Larval head structures of Omoglymmius hamatus and their implications for the relationships of Rhysodidae (Coleoptera: Adephaga)

in Insect Systematics & Evolution
No Access
Get Access to Full Text
Rent on DeepDyve

Have an Access Token?



Enter your access token to activate and access content online.

Please login and go to your personal user account to enter your access token.



Help

Have Institutional Access?



Access content through your institution. Any other coaching guidance?



Connect

Abstract

Internal and external features of the head of larvae of Rhysodidae were analyzed phylogenetically. A detailed description of the head of the larva of Omoglymmius hamatus (LeConte) is given. Omoglymmius and Rhysodes belong to a monophyletic unit which is characterized by an isolated submental sclerite and a strongly elongated prementum. The presence of a broad, undivided submental plate is a possible synapomorphy of Rhyzodiastes and Clinidium. The following features are considered autapomorphies of Rhysodidae: head extremely widened posteriorly, stemmata absent, frontoclypeolabral apotome strongly extended posteriorly, snout-like nasal projection, maxillolabial complex retracted, galea extremely modified, caudal premental apotome, labial palpi 1-segmented. Significant features indicate a sister-group relationship between Gyrinidae and the remaining Adephaga. Rhysodidae belong to a monophyletic group which comprises Geadephaga excl. Trachypachini. A sistergroup relationship between Rhysodidae and all other taxa of this monophylum is proposed as a working hypothesis. The wood-boring, xylophagous-fungivorous habits of Rhysodidae are almost certainly a secondary feature as indicated by the absence of the mandibular mola and other features. The hypothesis of a close relationship between Rhysodidae and Scaritini does not accord with the results of this study.

Larval head structures of Omoglymmius hamatus and their implications for the relationships of Rhysodidae (Coleoptera: Adephaga)

in Insect Systematics & Evolution

Sections

Information

Content Metrics

Content Metrics

All Time Past Year Past 30 Days
Abstract Views 16 16 3
Full Text Views 65 65 30
PDF Downloads 7 7 0
EPUB Downloads 0 0 0