Mantis

Mantises are an order (Mantodea) of insects that contains over 2,400 species in about 460 genera in 33 families. The largest family is the Mantidae ("mantids"). Mantises are distributed worldwide in temperate and tropical habitats. They have triangular heads with bulging eyes supported on flexible necks. Their elongated bodies may or may not have wings, but all mantodeans have forelegs that are greatly enlarged and adapted for catching and gripping prey; their upright posture, while remaining stationary with forearms folded, resembling a praying posture, has led to the common name praying mantis.

The closest relatives of mantises are termites and cockroaches (Blattodea), which are all within the superorder Dictyoptera. Mantises are sometimes confused with stick insects (Phasmatodea), other elongated insects such as grasshoppers (Orthoptera), or other more distantly related insects with raptorial forelegs such as mantisflies (Mantispidae). Mantises are mostly ambush predators, but a few ground-dwelling species are found actively pursuing their prey. They normally live for about a year. In cooler climates, the adults lay eggs in autumn, then die. The eggs are protected by their hard capsules and hatch in the spring. Females sometimes practice sexual cannibalism, eating their mates after copulation.

Mantises were considered to have supernatural powers by early civilizations, including ancient Greece, ancient Egypt, and Assyria. A cultural trope popular in cartoons imagines the female mantis as a femme fatale. Mantises are among the insects most commonly kept as pets.

The name mantodea is formed from the Ancient Greek words μάντις (mantis) meaning "prophet", and εἶδος (eidos) meaning "form" or "type". It was coined in 1838 by the German entomologist Hermann Burmeister. The name "mantid" properly refers only to members of the family Mantidae, which was, historically, the only family in the order. The other common name, praying mantis, applied to any species in the order (though in Europe mainly to Mantis religiosa), comes from the typical prayer-like posture these mantises adopt when their forelegs are folded. The vernacular plural "mantises" (used in this article) was originally confined largely to the US, with "mantids" predominantly used as the plural in the UK and elsewhere, until the family Mantidae was further split in 2002; at present, only some 75 out of 430 known genera are mantids, the rest are in 28 other families, and therefore no longer "mantids".

Over 2,400 species of mantis in about 430 genera are recognized. They are predominantly found in tropical regions, but some live in temperate areas. The systematics of mantises have long been disputed. Mantises, along with stick insects (Phasmatodea), were once placed in the order Orthoptera with the cockroaches (now Blattodea) and ice crawlers (now Grylloblattodea). Kristensen (1991) combined the Mantodea with the cockroaches and termites into the order Dictyoptera, suborder Mantodea.

Evolutionary relationships based on Evangelista et al. 2019 are shown in the cladogram:

One of the earliest classifications splitting an all-inclusive Mantidae into multiple families was that proposed by Beier in 1968, recognizing eight families, though it was not until Ehrmann's reclassification into 15 families in 2002 that a multiple-family classification became universally adopted. Klass, in 1997, studied the external male genitalia and postulated that the families Chaeteessidae and Metallyticidae diverged from the other families at an early date. However, as previously configured, the Mantidae and Thespidae especially were considered polyphyletic, so the Mantodea have been revised substantially as of 2019 and now includes 29 families.

Mantises are thought to have evolved from cockroach-like ancestors. Some of the earliest confidently identified mantis fossils date to the Early Cretaceous, although the Jurassic taxon Lovec was identified in 2024 from the Karabastau Formation. Fossils of the group are rare: by 2022, 37 fossil species are known. Fossil mantises, including one from Japan with spines on the front legs as in modern mantises, have been found in Cretaceous amber. Most fossils in amber are nymphs; compression fossils (in rock) include adults. Fossil mantises from the Crato Formation in Brazil include the 10 mm (0.39 in) long Santanmantis axelrodi, described in 2003; as in modern mantises, the front legs were adapted for catching prey. Well-preserved specimens yield details as small as 5 μm through X-ray computed tomography. Extinct families and genera include: