The order with the most numerous species, the coleoptera make up about 40% of all insect species. Known commonly as beetles their body plan doesn’t vary drastically within the order however homologous structures are often put to different uses. This chart shows adult forms (5, 10, 14, 15 & 17) highlighting the segmentation of the body into the head (I), prothorax (II), mesothorax (III), metathorax (IV) and abdomen (V). Two forms of larva are also illustrated; the scarabeiform larva (1) which usually reside within their food (eg. within a tree trunk) and the highly mobile elateriform larva (16) usually associated with ground dwelling and predatory forms.
The order with the most numerous species, the coleoptera make up about 40% of all insect species. Known commonly as beetles their body plan doesn’t vary drastically within the order however homologous structures are often put to different uses. This chart shows the development (1) of the potato beetle (Leptinotarsa decemlineata) from eggs (a) through the four instars of larvae (b I-IV) and the inactive pre-pupal larva (bV) before skipping the pupal stage to show the adult form (c). The pre-pupa (2), pupa(3 & 4) and adult (5) are also shown enlarged. Sketches of an antennae (6), leg (7) and mouthparts (8) are also illustrated.
Internal and external morphological features of a female oriental cockroach. A subset of the abbreviations are as follows: mandible (Mn), maxilla (Mx), labial palp (Lbi.p), maxillary palp (Mx.p), eye (E), cerebral ganglion (C.G), salivary glands (S.Gl), ventral ganglion (V.G), crop (Cr), gizzard (Gz), pyloric caeca (Py.C), malpighian tubule (M.Tb), rectum (R), ovipositor (O), vagina (Va), oviduct (Ovd).
Adult (1, 2, 9, 10 & 11) and larval (12 & 13) representatives of plant parasitising wasps and ants of Hymenoptera. Structures on plants are galls which are large deformations of plant tissue induced to grow once a female lays eggs into the plant tissue. These galls provide nutrients and protection for larvae however, these larvae are often hyper-parasitised by other hymenopterans, sometimes of the same family.
External appearances through complete metamorphosis of more derived Hymenopteran representatives showing: Maggot-like larval stages (1, 5 & 6), an inactive pupal stage (2), adult forms (3, 4 & 7) and early developmental stages (9-13). The parasatoid life history of many Hymenopteran wasps is represented (6).