An Inquiry Into the Natural Classification of the Dryopoidea, Based Partly on a Study of Their Internal Anatomy (Col.)

Abstract

CONTENTS.Introduction Acknowledgments . Method A comparison between the DRYOPIDAE and ELMIDAE . Larvae . (1) External anatomy . (2) Internal anatomy . (1) External anatomy . (2) Internal anatomy . Pupae . Adults . Summary . Larvae . The systematic position of the PELONOMINAE The systematic position of the LARINAE . . (1) External anatomy . (2) Internal anatomy . Pupae . Adults . (1) External anatomy . (2) Internal anatomy . Summary . A comparison between the LIMNICHIDAE and BYRRHIDAE Larvae .Adults .The systematic position of Lutrochus Er. and allied genera .(1) External anatomy .(2) Internal anatomy . Summary. Larvae . Adults .A comparison between the LIMNICHIDAE and DRYOPIDAE (1) External anatomy .(2) Internal anatomy . Summary .The systematic position of Psephelzoides Gahan.A comparison with the family PSEPHENIDAE .Larvae .(1) External anatomy .(2) Internal anatomy .(1) External anatomy .(2) Internal anatomy .Pupae . Adults . Summary. Larvae . A comparison between the PSEPHENIDAE and DRYOPIDAE(1) External anatomy .(2) Internal anatomy .(1) Externalanatomy . (2) Internal anatomy . Pupae . Adults . Summary . Appendix A. Description of Phanoceroides apuaticus &en. et sp. Appendix B. Description of larva of Lutrochus Er. References . . , n.

A revision of the Larainae (Coleoptera, Elmidae) of Venezuela, with description of nine new species

“…Phanoceroides species have unique habitat requirements in the subfamily Larainae, in that they remain fully submerged and are found in the benthos of streams, as opposed to water-splashed surfaces in streams as others in Larainae (Hinton 1939). …”

18. Byrrhoidea. Teil 2

“…They breathe dissolved oxygen using spiracular gills (Hinton 1955(Hinton , 1966Jäch 1984). Streamlined larvae usually pupate on the smooth underside of stones or logs nearby streams.…”

“…The respiratory systems of the psephenid larvae are of particular interest, since they include nearly as many fundamentally different types of respiratory structures as are to be found in all other beetle larvae together (Hinton 1955). The tracheal system of Eubrianacinae and Psepheninae is amphipneustic in all instars, and both mesothoracic spiracles and those of abdominal segment VIII are biforous.…”

“…Eubriinae are metapneustic (e. g., Eubria) or apneustic (Microeubria, earlier instars of Sclerocyphon and Tychepsephus). Anal papillae ab-Brought to you by | Stockholms Universitet Authenticated Download Date | 8/24/15 9:31 PM sent in the species with ventral abdominal gills but a single pair is present in all those with anal tracheal gills (Hinton 1955). 21) found on anterior corners of abdominal segment IX interacts with the spiracles (of abdominal segment VIII) in Eubriinae (Fig.…”

“…Central nervous system: pro-and mesothoracic ganglia widely separated, metathoracic and abdominal ganglia more or less completely fused (Hinton 1939).…”