Translator Disclaimer
25 March 2020 Larval Morphology of Megaporus Brinck, 1943 (Coleoptera: Dytiscidae): Descriptions of M. Hamatus (Clark, 1862) and M. Gardnerii (Clark, 1862) and Phylogenetic Considerations
Author Affiliations +
Abstract

The larvae of the Australian endemic species Megaporus gardnerii (Clark, 1862) and M. hamatus (Clark, 1862) are described and illustrated for the first time, with detailed morphometric and chaetotaxic analyses of the cephalic capsule, head appendages, legs, last abdominal segment, and urogomphi. We explore implications for understanding the evolution of larval morphological traits amongst selected Sternopriscina genera. A parsimony analysis based on 84 larval characteristics of seven species in five genera was conducted using the program TNT. Larvae of Megaporus Brinck are characterized by the primary seta AB3 articulated distad of seta AB2, a very elongate siphon, and predominantly elongate and hair-like secondary setae on the urogomphi. Megaporus is postulated to be closely related phylogenetically to Chostonectes Sharp in the context of this study, which reinforces previous hypotheses based on adult and molecular data sets. These results provide a phylogenetic framework for future studies of the larvae of the Sternopriscina.

Yves Alarie, Mariano C. Michat, and Chris H. S. Watts "Larval Morphology of Megaporus Brinck, 1943 (Coleoptera: Dytiscidae): Descriptions of M. Hamatus (Clark, 1862) and M. Gardnerii (Clark, 1862) and Phylogenetic Considerations," The Coleopterists Bulletin 74(1), 139-160, (25 March 2020). https://doi.org/10.1649/0010-065X-74.1.139
Received: 29 June 2019; Accepted: 15 January 2020; Published: 25 March 2020
JOURNAL ARTICLE
22 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top