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Lepidurus
Temporal range: Early Jurassic–Present[1]
Lepidurus arcticus
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Branchiopoda
Order: Notostraca
Family: Triopsidae
Genus: Lepidurus
Leach, 1819

Lepidurus is a genus of small crustaceans in the order Notostraca (tadpole shrimp). It is the larger of the two extant genera of the tadpole shrimps, the other being Triops. They are commonly found in vernal pools and survive dry periods with the help of long lasting resting eggs.

Adult freshwater crustacean of the genus Lepidurus.

The genus contains the following species:[2]

References

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Lepidurus

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Lepidurus is a of tadpole shrimp comprising ancient branchiopod crustaceans in the order and family Triopsidae, distinguished by a broad, flattened, shield-like that covers the head and , 35–70 pairs of trunk limbs used for swimming and respiration, and an elongated, segmented terminating in two long, tail-like cercopods with a supra-anal plate. These "living fossils," with morphology largely unchanged for over 70 million years, typically measure 10–58 mm in length as adults and inhabit ephemeral freshwater bodies such as vernal pools and temporary ponds worldwide, from arctic regions to arid southwestern . The genus includes approximately 12 described species and subspecies, such as L. apus (widespread in Europe, North Africa, and Asia), L. packardi (endangered vernal pool specialist in California's Central Valley), L. lemmoni (common in western North America), and L. arcticus (circumpolar in cold habitats). Taxonomically, Lepidurus differs from its sister genus Triops by the presence of a median abdominal appendage and a central keel on the caudal lamina, though the two genera rarely co-occur as adults due to overlapping but partitioned ecological niches. Ecologically, Lepidurus species are opportunistic benthic feeders, consuming detritus, algae, and smaller invertebrates like fairy shrimp, while actively swimming in a face-down orientation to stir sediments. Reproduction in Lepidurus is versatile, involving amphimixis (), , or hermaphroditism, with females producing over 1,000 drought-resistant cysts (resting eggs) in their lifetime that enter to endure drying and extreme conditions, hatching as nauplii upon reflooding—often in cooler early spring waters. This adaptation enables rapid population booms in fishless, seasonal habitats but renders many species vulnerable to habitat loss, invasive predators, and climate variability; for instance, L. packardi was federally listed as endangered in 1994 due to destruction of California's ecosystems. Overall, Lepidurus exemplifies the resilience and evolutionary stasis of , serving as key components in temporary food webs and subjects of ongoing molecular and phylogenetic to resolve taxonomic ambiguities.

Taxonomy

Classification

The genus Lepidurus belongs to the kingdom Animalia, phylum Arthropoda, class Branchiopoda, order Notostraca, and family Triopsidae. It was formally established as a distinct genus by William Elford Leach in 1819, distinguishing it from related notostracans based on key morphological traits. The name Lepidurus derives from the Greek words lepis (scale) and oura (tail), alluding to the scaled structure of the telson, the terminal abdominal appendage characteristic of the genus. Historically, early descriptions of species now assigned to Lepidurus appeared under various names, such as Monoculus apus described by Carl Linnaeus in 1758, which encompassed a broad group of phyllopod-like crustaceans. Subsequent revisions in the 19th and 20th centuries, including works by Longhurst (1955) and later systematists, clarified genus boundaries through detailed morphological and distributional analyses, separating Lepidurus from synonyms like Apus and refining its distinction from the congeneric Triops. Phylogenetically, Lepidurus is one of only two extant genera in the order , alongside Triops, forming a monophyletic within as confirmed by molecular analyses of mitochondrial and nuclear markers. This ancient lineage traces back to the Upper , with records of notostracans exhibiting similar morphologies from that period (approximately 365 million years ago), and estimates indicating divergence between Lepidurus and Triops occurred in the , approximately 150–250 million years ago, based on molecular and data. These findings underscore the "living " status of , with minimal morphological evolution over hundreds of millions of years despite significant genetic divergence.

Species

The genus Lepidurus comprises approximately 12 recognized species and subspecies of tadpole shrimps, distributed across temporary freshwater habitats worldwide, with the type species L. apus serving as a cosmopolitan representative. These taxa are distinguished primarily by features of the , supra-anal plate, , and caudal lamina, as detailed in key taxonomic revisions.
Species/SubspeciesAuthor and YearType LocalityDistributionKey Distinguishing Traits
L. apus (type species)Linnaeus, 1758Cosmopolitan (Holarctic, temporary pools in , , )Smooth ; caudal lamina 3–4 times longer than with 20–100 medial spines on strong central ; 35–40 pairs of legs.
L. arcticusPallas, 1793Ooglamie, Circumboreal ( regions, , )Short supra-anal plate (7–13% of length); no central ; 41–46 pairs of legs; body rings total 26–28.
L. lubbocki (often as L. apus lubbocki)Brauer, 1873Lake of Mediterranean basin and (temporary wetlands)Caudal lamina 3–4 times longer than ; 3–25 medial spines on weak central ; debated as valid versus cryptic variant of L. apus.
L. batesoniLonghurst, 1955Balkhash region, (saline temporary pools)Caudal lamina at least twice as long as broad (length/width ratio ~2.3); elongated .
L. mongolicusVekhov, 1992, (arid temporary waters)Broadly explanate caudal lamina (length/width ratio 0.8–1.5); adapted to high-salinity conditions.
L. packardiSimon, 1886, , Endemic to (vernal pools)Nuchal plate with 8 dorsal spines; supra-anal plate ~20% of length; ~35 pairs of legs; body rings total 27.
L. couesii, 1875, Western (temporary lakes, ditches)Strong central on supra-anal plate with 20–100 spines; short, broad ; 35–40 pairs of legs; body rings total 25–27.
L. bilobatusHolmes, 1894Po Canyon, Vermillion River, , region (high-altitude temporary pools)Long abdomen with ~62 pairs of legs; slightly bilobed supra-anal plate with 4–6 dorsal spines; body rings total 32.
L. lynchiLonghurst, 1952Upper , Washington, Western (alkaline temporary lakes)Long ; often bilobed supra-anal plate (7–35% of length); 60–71 pairs of legs; body rings total 30–34.
L. lemmoniHolmes, 1894Western (specific locality unclear)Western (temporary alkaline waters from to )Similar to L. couesii in leg count and shape; taxonomic validity debated, with some records reidentified as L. couesii.
L. cryptusRogers, 2001Nearctic region (specifics from molecular surveys) (temporary pools)Cryptic species distinguished by molecular markers; morphological traits overlap with L. packardi and others.
L. lynchi echinatus (/variety)Longhurst, 1952Goose Lake, , Western (temporary lakes)Large lateral spines on ; 67–68 pairs of legs; body rings total 31–33; considered a variant of L. lynchi.
Taxonomic controversies persist within Lepidurus, particularly regarding the validity of such as L. apus lubbocki, which some studies treat as a distinct entity while others subsume it under L. apus due to morphological overlap. Additionally, L. lemmoni has been proposed for synonymy with L. couesii based on reexamination of type material and lack of unique diagnostic characters. Molecular analyses further suggest the presence of undescribed cryptic species across the , challenging current classifications and indicating higher diversity than the recognized ~12 taxa; recent genomic studies (as of 2022) confirm cryptic lineages, potentially warranting additional species descriptions.

Description

Morphology

Lepidurus species exhibit an elongated, tadpole-like body form characteristic of the order , consisting of a head, trunk, and . The head bears a pair of sessile dorsal compound eyes and small, uniramous antennules that are poorly segmented and directed anteriorly. The trunk is partially enclosed by a large, dorsoventrally flattened that covers the head and , often extending to cover a significant portion of the trunk; this is broad and flat, typically dark green or brown in adults but translucent in immature individuals, and may feature a dorsal node or marginal spines in certain species. The trunk possesses 35–70 pairs of foliaceous, biramous appendages known as phyllopods, which decrease in size posteriorly and serve functions including , respiration, feeding, and substrate manipulation; each appendage includes endites equipped with setae and spines for food handling. The is long and scaled, terminating in two thin cercopods flanking a medial extension called the supra-anal plate or caudal lamina, which bears varying numbers of medial spines and a central . Internally, Lepidurus features an open with a dorsal heart that pumps through arteries into the hemocoel. The digestive tract includes a straight , a with associated midgut glands () for nutrient absorption, and a leading to the anus near the base; food is processed via a shallow ventral groove without specialized . The comprises a () connected to paired ventral nerve cords along the trunk, with abundant sensillae on the appendages enhancing sensory capabilities.

Size and variation

Adult individuals of the genus Lepidurus typically range from 20 to 50 mm in total body length, though some species can attain lengths up to 86 mm, as in L. packardi. Juveniles emerge from cysts as metanaupliar larvae measuring approximately 2-3 mm in length shortly after hatching. Growth is indeterminate, with individuals continuing to increase in size through multiple molts throughout their lifespan in ephemeral aquatic environments. Sexual dimorphism is evident in Lepidurus, with males generally smaller than females and possessing specialized claspers on the first pair of trunk limbs used for transfer during . Females are larger on average and typically bear a brood pouch on the , formed by modifications to the eleventh pair of thoracopods, which serves to incubate developing embryos. Hermaphroditism occurs rarely in certain populations, contributing to androdioecious reproductive strategies alongside gonochoristic in some . Intraspecific variation within Lepidurus includes differences in coloration, ranging from translucent or buff in turbid waters to reddish-brown or in clearer conditions. The number of spines on the also exhibits variability, with even asymmetry between left and right sides in individuals. Post-hatching growth is rapid in temporary pools, driven by frequent molting—often every few days—to accommodate the short lifespan and environmental constraints of these habitats.

Habitat and distribution

Preferred habitats

Lepidurus species primarily inhabit temporary freshwater pools, such as vernal pools, playas, and melt ponds, favoring astatic waters that dry out seasonally. These environments provide predator-free conditions during their active aquatic phase, with the genus exhibiting broad tolerances to environmental stressors including low oxygen levels, up to approximately 2-7 ppt (varying by species), and temperatures ranging from near 0°C to 40°C (varying by species). Within these habitats, Lepidurus prefers shallow depths of 2-15 cm (varying by ), often utilizing vegetated edges for cover and foraging amid aquatic plants or algal mats. The substrate typically consists of mud or clay, which facilitates egg burial and retention of moisture during dry periods. pH in favored microhabitats is generally alkaline to neutral, ranging from 7 to 9, supporting optimal physiological functions. A key to the temporality of these pools is the rapid colonization enabled by wind-dispersed resting eggs, allowing Lepidurus to exploit newly flooded sites efficiently. Unlike the related Triops, which thrives in warmer lowland temporary waters, Lepidurus species are more commonly associated with cooler, higher-altitude pools.

Geographic range

The genus Lepidurus exhibits a nearly , primarily in Holarctic and temperate regions, inhabiting ephemeral freshwater bodies such as temporary pools and ponds, but it is largely absent from tropical zones and permanent lakes. Fossils of notostracans assignable to Lepidurus and related forms indicate a wider historical range, with records dating back to the and earlier, suggesting greater past ubiquity across continents before modern biogeographic constraints. Species distributions vary regionally. L. apus, the most widespread, occurs across , , and , including records in temporary wetlands from to . In the , L. arcticus spans circumboreal areas from to and . Australian populations, often attributed to L. angasi or related taxa, are found in southern and inland temporary waters. In , endemics include L. packardi, restricted to vernal pools in California's Central Valley, and L. lemmoni, primarily in the region across , , and adjacent states. Dispersal is predominantly passive, facilitated by waterfowl transporting resting eggs, wind carrying dried cysts, and human activities introducing them to new sites, such as agricultural disturbances. Recent expansions have been documented in altered landscapes, including new L. lemmoni occurrences in California's Central Valley, likely due to modification. Biogeographic patterns show higher species diversity in western , with over five recognized (e.g., L. packardi, L. lemmoni, L. couesii) in the and Sierra Nevada, compared to , where L. apus dominates with minimal . This disparity reflects regional in arid, ephemeral habitats versus broader Palearctic ranges.

Biology

Diet and feeding

Lepidurus species are omnivorous filter-feeders and that employ their phyllopodial trunk limbs to generate currents, facilitating the capture of suspended particles while also sifting through benthic sediments for . These limbs, equipped with endites bearing setae, enable efficient of fine particles from the and substrate. occurs primarily in the , supported by glandular tubules of the that secrete enzymes to break down ingested material. The diet of Lepidurus primarily consists of , , , and , supplemented opportunistically by small such as rotifers, copepods, and fairy shrimp, as well as carrion. In dense populations, individuals may engage in , consuming smaller conspecifics, which serves as an additional protein source. Daily food intake can reach substantial levels relative to body mass, supporting rapid growth in ephemeral habitats, though exact rates vary with environmental conditions and prey availability. As key consumers in temporary pools, Lepidurus play a vital trophic role in cycling by processing and bioturbating sediments, which enhances the release of nutrients into the water column and promotes productivity. This activity influences microbial communities and supports higher trophic levels through efficient and detrital breakdown.

Predators and interactions

Lepidurus species face predation from a variety of vertebrates and primarily during the active phase of temporary pools when individuals are and at the surface or in shallow waters. Wading birds such as , avocets, and plovers, along with waterfowl like , consume both adult Lepidurus and their diapausing eggs, aiding in egg dispersal while exerting top-down pressure on populations. Amphibians, including tadpoles, prey on juveniles and smaller adults in vernal pools. In semi-permanent pools supporting , such as redband or tui chub, Lepidurus are highly vulnerable due to their swimming behavior, though they typically inhabit fish-free environments to minimize this risk. Invertebrate predators include backswimmers (Notonecta spp.) and predaceous diving beetle larvae (Dytiscus spp.), which target smaller or injured individuals. Lepidurus co-occur with competitors such as tadpole shrimp, fairy shrimp (, e.g., Branchinecta spp.), and (Spinicaudata) in temporary wetlands, where resource overlap in and prey can limit population growth. Niche partitioning occurs through differences in hatching timing, with Lepidurus often emerging later than faster-hatching fairy shrimp to reduce early competition, or via spatial separation by depth in deeper pools. Ecological interactions of Lepidurus include their role as key prey in food webs, supporting migratory shorebirds and waterfowl in regions like the . Bioturbation through burrowing and sediment disturbance enhances sediment oxygenation and nutrient release, indirectly benefiting algal growth by increasing concentrations and , which favors over competitors like macrophytes. Occasional aggressive interactions occur among conspecifics, including on juveniles or injured adults. Defensive adaptations encompass inducible morphological changes, such as the development of spines on the and cercopods in response to injury or temperature cues, along with burrowing into sediments to evade predators and rapid escape swimming powered by undulating phyllopods.

Reproduction

Life cycle

The life cycle of Lepidurus begins with from resistant cysts, triggered by environmental cues including flooding that wets the dry eggs, exposure to light, and suitable temperatures such as around 20°C for species like L. couesii. These cues signal the onset of favorable conditions in temporary pools, allowing the non-feeding nauplius-like larvae (often metanauplii in notostracans) to emerge. Post-hatching, the larvae undergo rapid through multiple instars—typically 10–15, as observed in like Lepidurus apus with up to 13 documented instars—to reach the adult form. This development occurs in 2–4 weeks under optimal conditions, with early instars being non-feeding and miniature adult-like, transitioning to active feeding by the third stage in such as L. arcticus. Growth is exponential initially, driven by high food availability and temperatures around 10–20°C, though it slows in later stages; size can increase substantially within weeks, influenced by factors like and nutrient levels. Sexual maturity is attained after 10–20 days in many species, enabling reproduction before pools dry; for example, Lepidurus packardi matures in about 38 days on average. The active lifespan in inundated pools lasts 1–3 months, up to around 144 days in longer-lasting habitats, during which multiple generations may overlap if conditions persist. As pools evaporate, adults produce resting eggs that enter to survive , awaiting future wetting events.

Resting eggs and dormancy

In species of the Lepidurus, such as L. packardi and L. arcticus, females produce resting eggs, also known as cysts, which serve as the primary mechanism for surviving unfavorable conditions in ephemeral aquatic habitats. These eggs are laid in clutches ranging from 8 to 61 per brood, with larger females capable of producing up to six such broods during a single , resulting in hundreds of cysts per individual over its lifespan. The cysts develop thick, multilayered shells that encapsulate the , providing resistance to , freezing temperatures down to -20°C, radiation, and even predation or mechanical damage during dry periods. The resting eggs enter a state of diapause, a programmed dormancy that arrests embryonic development and can last from several months to over a decade, with documented viability exceeding two years under dry, room-temperature conditions in species like L. couesii. This diapause phase is typically terminated by environmental cues such as rehydration upon pool refilling, low temperatures (e.g., freezing for 24 hours), or specific light and oxygen levels, ensuring hatching aligns with the onset of favorable wetland conditions. Cysts remain dormant in sediment layers, forming an "egg bank" analogous to seed banks in plants, which buffers populations against annual variability in rainfall. Hatching success of these cysts varies from 10% to 80% depending on cues like (optimal at 10–20°C) and illumination, with synchronized often occurring within 1 hour to 3 weeks after inundation; for instance, studies show 64–77% viability for rehydrated cysts post-diapause breakage. This variable success helps regulate while maintaining through mechanisms such as in gonochoristic populations or self-fertilization in hermaphroditic ones, preventing in isolated habitats. The production and dormancy of resting eggs represent a critical evolutionary for Lepidurus, an ancient lineage dating back over 250 million years, enabling persistence in unpredictable temporary pools where active life stages would otherwise perish during seasonal droughts. This strategy not only ensures recolonization of refilled habitats but also facilitates dispersal via wind, water, or animal vectors, sustaining metapopulations across fragmented landscapes.

Conservation

Status of key species

Lepidurus packardi, known as the vernal pool tadpole shrimp, is federally listed as endangered under the Endangered Species Act since September 19, 1994, due to severe habitat loss and restricted range. It is also classified as Endangered on the , reflecting its vulnerability from ongoing degradation of ephemeral freshwater habitats in California's Central Valley. Less than 10% of the original habitat remains, primarily converted to and urban development, severely limiting population viability. Among other notable species, Lepidurus apus is widespread across and , and while not formally assessed on the , it is considered of Least Concern due to its broad distribution in temporary ponds. Similarly, Lepidurus arcticus, the Arctic tadpole shrimp, holds a global rank of G5 (secure) from NatureServe, indicating Least Concern status, though populations are monitored for potential climate change impacts in high-latitude wetlands. In , several endemic species face heightened risks; for example, Lepidurus bilobatus (Great Basin tadpole shrimp) is ranked G2 (imperiled) by NatureServe owing to its occurrence in only seven widely separated localities across the , making it Vulnerable to local extinctions from habitat loss. Population trends across the genus show declines in many species attributable to , which isolates small populations and reduces , particularly in ephemeral pool systems dependent on seasonal flooding. However, some populations remain stable within protected areas, such as national wildlife refuges in where conservation efforts preserve core complexes. Legal protections vary by region and species; in the United States, the Endangered Species Act provides safeguards for L. packardi through habitat conservation plans and critical habitat designations spanning over 800,000 acres in the Central Valley. In Europe, L. apus benefits indirectly from the EU , which designates Mediterranean temporary ponds as priority habitats requiring protection and restoration to support associated branchiopod communities.

Threats and protection

Lepidurus species, particularly the endangered L. packardi, face significant threats from anthropogenic activities that degrade their ephemeral wetland habitats. Urban development and agricultural conversion have resulted in the loss of approximately 90% of habitats in 's Central Valley, fragmenting populations and reducing available breeding sites. Invasive non-native plants, such as grasses, compete for space and alter , while introduced predators like bullfrogs (Lithobates catesbeianus) and (Gambusia affinis) prey on adults and juveniles in altered pools. exacerbates these pressures by intensifying droughts and shortening pool inundation periods, which are critical for the species' 25- to 54-day maturation cycle. from pesticides, herbicides, and further contaminates pool waters, with applying over 175 million pounds of pesticides annually, many of which leach into seasonal wetlands. overdraft disrupts natural by lowering water tables and altering recharge patterns, leading to inconsistent pool filling. Conservation efforts for Lepidurus emphasize habitat protection and restoration to mitigate these threats. In California, vernal pool preserves, such as those managed by the Sacramento Valley Conservancy, safeguard over 1,700 acres of critical habitat, including swales and pools supporting L. packardi. The U.S. Fish and Wildlife Service's 2005 Recovery Plan outlines strategies like protecting 95% of high-priority Zone 1 core areas and implementing adaptive management to maintain ecosystem function through controlled grazing and invasive species removal. Legal protections under the Endangered Species Act (ESA), with L. packardi listed as endangered since 1994, include designated critical habitat spanning 811,552 acres and incidental take permits that allow development while requiring mitigation. Vernal pools also benefit indirectly from the Ramsar Convention on Wetlands, which promotes international conservation of such ecosystems. Research on cyst banks—dormant egg reserves in sediments—supports reintroduction efforts, with studies showing cysts can remain viable for years and serve as sources for repopulating extirpated sites. Although formal captive breeding programs are limited, permits enable collection and laboratory rearing of cysts for genetic studies and potential augmentation. Challenges persist in conserving Lepidurus due to the cryptic nature of their life cycle and ongoing land-use conflicts. Monitoring resting eggs (cysts) is difficult, as they are buried in sediments and require specific cues like and to hatch, complicating population assessments. Development pressures often necessitate incidental take permits, such as those under the East Contra Costa County Habitat Conservation Plan, which balance economic needs with species protection but can lead to if mitigation sites underperform. Successes include population recoveries in restored habitats, such as Montana's Northwestern Glaciated Plains, where L. bilobatus has persisted in protected temporary pools amid broader efforts, demonstrating the efficacy of ecosystem-level management. In , preserves like the Prairie City State Vehicular Recreation Area have sustained L. packardi through restoration, with monitoring showing viable banks and annual hatches post-rehabilitation.

References

  1. https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/lepidurus
  2. https://www.fws.gov/species/vernal-pool-tadpole-shrimp-lepidurus-packardi
  3. https://www.researchgate.net/publication/351771073_Tadpole_Shrimps_-_A_General_Review_of_the_Little_Known_Crustaceans_of_Ephemeral_Waterbodies
  4. https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=83605
  5. http://www.irmng.org/aphia.php?p=taxdetails&id=1365188
  6. https://www.fishbiopedia.com/wp-content/uploads/2022/09/1.pdf
  7. https://www.gbif.org/species/4667735
  8. https://biodiversity.org.au/afd/taxa/Lepidurus
  9. https://decapoda.nhm.org/pdfs/38896/38896.pdf
  10. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0034998
  11. https://bmcecolevol.biomedcentral.com/articles/10.1186/1471-2148-13-30
  12. https://www.sciencedirect.com/science/article/abs/pii/S105579031300314X
  13. https://www.researchgate.net/publication/232679280_Revision_of_the_Nearctic_Lepidurus_Notostraca
  14. https://repository.si.edu/bitstream/handle/10088/16553/USNMP-102_3291_1952.pdf
  15. https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.815828/Lepidurus_cryptus
  16. https://www.researchgate.net/publication/235955541_Lepidurus_apus
  17. https://academic.oup.com/jhered/article/113/6/706/6694764
  18. https://royalsocietypublishing.org/doi/10.1098/rstb.1988.0091
  19. https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/aquatic-arthropods
  20. https://decapoda.nhm.org/pdfs/174/174-001.pdf
  21. https://research.nhm.org/pdfs/3308/3308.pdf
  22. https://academic.oup.com/jcb/article/35/3/319/2547844
  23. https://academic.oup.com/jcb/article/21/4/991/2679840
  24. https://www.kmkjournals.com/upload/PDF/ArthropodaSelecta/28/28_1_065_072_Saganovich_et_al_for_Inet.pdf
  25. https://objects.lib.uidaho.edu/etd/pdf/Hill_idaho_0089N_10619.pdf
  26. https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.108639/Lepidurus_packardi
  27. https://www.jstor.org/stable/20103525
  28. https://pdfs.semanticscholar.org/01cf/fd568875bdc60237ba0f33b29e7a93590cc9.pdf
  29. https://www.sciencedirect.com/science/article/abs/pii/S0044523123000669
  30. https://repository.royalholloway.ac.uk/items/0244c440-a44b-4cf8-bc0c-7c7016e37627/1/10098541.pdf
  31. https://journal.wildlife.ca.gov/2025/03/23/first-record-of-lepidurus-lemmoni-holmes-1894-crustacea-notostraca-in-californias-central-valley/
  32. https://journal.wildlife.ca.gov/2025/03/23/first-record-of-lepidurus-lemmoni-holmes-1894-crustacea-notostraca-in-californias-central-valley/?print=print
  33. https://www.epa.gov/system/files/documents/2025-10/vernal-pool-tadpole-shrimp-documentation.pdf
  34. https://www.researchgate.net/publication/226996217_Ecosystem-level_effects_of_bioturbation_by_the_tadpole_shrimp_Lepidurus_packardi_in_temporary_pond_mesocosms
  35. https://animaldiversity.org/accounts/Lepidurus_packardi/
  36. https://www.cocohcp.org/DocumentCenter/View/851/Vernal-Pool-Tadpole-Shrimp-Lepidurus-packardi-Species-Profile-PDF
  37. https://www.journals.uchicago.edu/doi/abs/10.1086/283684
  38. https://scholars.csus.edu/view/pdfCoverPage?instCode=01CALS_USL&filePid=13268015170001671&download=true
  39. https://www.researchgate.net/publication/227267711_Influence_of_temperature_on_hatching_of_eggs_of_Lepidurus_couesii_Crustacea_Notostraca
  40. https://usercontent.one/wp/www.learningarcticbiology.info/wp-content/uploads/2023/09/Pasquali-et-al-2019.pdf
  41. https://www.researchgate.net/publication/263350475_7_Notostraca
  42. https://usercontent.one/wp/www.learningarcticbiology.info/wp-content/uploads/2023/09/Lakka-2013.pdf
  43. http://sitesreservoirproject.riptideweb.com/references/REF21/_Ch10_WildlifeResources/Ahl_1991_tadpole_shrimp_egg_reserves.pdf
  44. https://academic.oup.com/plankt/article/35/4/707/1528340
  45. https://ecosphere-documents-production-public.s3.amazonaws.com/sams/public_docs/species_nonpublish/1126.pdf
  46. https://eunis.eea.europa.eu/species/314818
  47. https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.115316/Lepidurus_arcticus
  48. https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.118681/Lepidurus_bilobatus
  49. https://ecos.fws.gov/ecp/species/2246
  50. https://wildlife.ca.gov/Conservation/Plants/Vernal-Pools
  51. https://sacramentovalleyconservancy.org/1000acresspvpp/
  52. https://www.ramsar.org/sites/default/files/documents/library/sitelist.pdf
  53. https://ecos.fws.gov/ecp/report/conservation-plan?plan_id=546
  54. https://fieldguide.mt.gov/speciesDetail.aspx?elcode=ICBRA10030
  55. https://ohv.parks.ca.gov/?page_id=27452
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