Qu’est-ce qu’un épipleurite ? Une contribution à la théorie subcoxale appliquée à l’abdomen des Insectes
| Autor: | Thierry Deuve |
|---|---|
| Přispěvatelé: | Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Insecta Arthropoda media_common.quotation_subject 010607 zoology Zoology morphogenesis pleurite Morphology (biology) Insect wings 010603 evolutionary biology 01 natural sciences Hexapoda ectodermal genitalia subcoxa morphology precoxa Ecology Evolution Behavior and Systematics media_common limb Larva biology [SDV.BDD.MOR]Life Sciences [q-bio]/Development Biology/Morphogenesis Insect morphology biology.organism_classification [SDV.BA.ZI]Life Sciences [q-bio]/Animal biology/Invertebrate Zoology Insect Science segment Imago sternite |
| Zdroj: | Annales de la Société Entomologique de France Annales de la Société Entomologique de France, Taylor & Francis, 2018, 54 (1), pp.1-26. ⟨10.1080/00379271.2018.1431568⟩ |
| ISSN: | 0037-9271 2168-6351 |
| DOI: | 10.1080/00379271.2018.1431568⟩ |
| Popis: | International audience; The epipleurites were originally described by Hopkins in 1909 on the imago and larva of a beetle. Then this term was widely used in insect morphology, mainly for larvae, to designate certain sclerites of the pleural region. They have recently been interpreted as tergopleural (i.e. pleural but not strictly appendicular) by Deuve in 2001, but a study of embryonic development by Kobayashi et al. in 2013 has shown that they are instead eupleural (i.e. appendicular) and correspond to a dorsal part of the subcoxa. Their presence in the abdominal segments of insects illustrates the fundamental importance of the subcoxa in segmental structure, with a function of anchoring and supporting the appendage when the latter is present. However, the epipleurites are normally separated and functionally dissociated from the coxosternum, which integrates the ventral component of the subcoxa. In females, the epipleurite of segment IX of the abdomen corresponds to the gonangulum, as already pointed out by Deuve in 1994 and 2001, and it is involved in gonopod articulation. At segments VIII and IX of both males and females of holometabolans, the formation process of the genital ducts leads to an internalisation of the whole subcoxosternum (i.e. the coxosternum with the exception of the coxal and telopodal territories), and it is the two flanking epipleurites that ventrally close the abdomen in relation to the rearward displacement of the gonopore. This model may be generalised, in its broad lines, to a large part of the hemimetabolans. The body plan of the insect abdomen underlines the morphological and functional importance of the subcoxa in its fundamental structure, but the study of the Hexapoda in general also indicates the presence of a more proximal segment, the precoxa, which would belong to the groundplan but is more cryptic because it is often closely associated with the subcoxa and/or the paranotal lobe. Its location, which is sometimes on the ventral flank of the paranotal lobe, is in line with the hypothesis of a dual origin of the pterygote wing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|