The third instars of Coelhydrus brevicollis Sharp and Darwinhydrus solidus Sharp 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. A key for the identification of the third instars of the genera of Hyphydrini known in detail is provided. A parsimony analysis based on 49 informative larval characteristics was conducted using the program TNT. The consensus tree supports a placement of Coelhydrus Sharp and Darwinhydrus Sharp within the tribe Hyphydrini. Within the Hyphydrini, Coelhydrus is postulated to share a monophyletic origin with Hyphydrus Illiger and Desmopachria Babington. The phylogenetic placement of Darwinhydrus, however, remains contentious as our study found it part of an unresolved polytomy with Andex Sharp and Primospes Sharp.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.