In the family Helotrephidae, the sister family to Pleidae, Papacek (2002, 2008) showed that the 1st gonapophysis is taxonomically informative at the genus level.
Drake & Chapman (1953) noted that there was a large amount of overlap in the morphological characters being used to identify species in the family Pleidae.
Herein, we also expand on the description of the 1st gonapophysis of Pleidae given by Scudder (1959), with a concentration on the species of the genus Neoplea.
The sclerotized external genitalia of Pleidae are all part of abdominal segments VIII and IX (Fig.
A new genus and species of Pleidae (Hemipera) from Venezuela, with notes on the genera of Pleidae.
Preliminary report on the Pleidae (Hemiptera) of the Americas.
New records of aquatic Heteroptera for Colorado: Notonectidae, Pleidae, Corixidae.
Plea piccanina Hutchinson, 1925 Plea pullula Stal, 1855 Insecta: Diptera (all larvae) Culicidae Anopheles sp.
C4, C6 Trepobates pictus (Herrich-Schaeffer): B1, B3, C1 Trepobates subnitidus Esaki: B2, C2, C3 Family Mesoveliidae Mesovelia mulsanti White: A12, C4 Family Nepidae Ranatrafusca Palisot: A2, A8, A13 Family Notonectidae Notonecta irrorata Uhler: A11, B3, B4, C10 Family Pleidae
Neoplea striola (Fieber): A2, B2, C5 Family Veliidae Microvelia spp.
Examples of very different overwintering strategies include some corixids (water boatmen) that overwinter in air bubbles in ice, some Pleidae
(pygmy backswimmers) that switch to plastron respiration to overwinter on the bottom of ponds, some ochterids (velvety shore bugs) that overwinter as nymphs on moss on soil, some hydrometrids (marsh treaders) that overwinter as adults on land far from water, and some veliids (broad-shouldered water striders) that are active in the warmer days in winter.
The Family Pleidae (pygmy backswimmers) was identified to Plea at NPS2.
Hydropsyche simulans pupae Hydroptilidae Neotrichia X Orthotrichia X Leptoceridae Anthripsodes X Leptocerus X Nectopsyche X Oecetis X Polycentropodidae Cyrnellus fraternus Neureclipsis Hemiptera Belostomatidae Lethocerus X Corixidae Sigara X Pleidae Plea X Coleoptera Dysticidae Dytiscus Laccophilus X Gyrinidae Dineutus X Gyrinus?