Gattung in ColKat anzeigen Genus Hydrophilus - New World Coleoptera - Hydrophilidae
  By Arved Lompe (after Short & McIntosh and others)
If you find any errors or omissions please mail me at mailbox@lompe.de 		 References =>
#1 Abdomen with glabrous region limited to the medial line of ventrites 3-5 [fig.1]. Prosternum divided into lateral halves for the reception of the anterior portion of the sternal keel. Dorsal surface sometimes appearing greenish. Subgenus

   ...Dibolocelus
HYDROPHILUS OVATUS
fig.1		 
-- Abdomen with glabrous region not limited to medial line of ventrites 3-5. Prosternum strongly emarginated posteriorly bul not divided into lateral halves. Dorsal surface never appearing greenish. Hydrophilus s.str.

   ...2

  
#2 Habitus [fig.2]. Specimens usually smaller (<32 mm). Collectively, the glabrous regions of ventrites 2-5 from a distinctive "kite" shaped glabrous region [fig.3]. Aedoeagus [fig.4]. Widespread from Mexico to Argentina, but not yet known from the Nearctic region.

     ...ensifer Brullé, 1837
HYDROPHILUS ENSIFER
fig.2		HYDROPHILUS ENSIFER
fig.3
HYDROPHILUS ENSIFER
fig.4		 
-- Specimens usually larger (>34 mm). Abdominal pubescence broad, nol forming a "kite" shaped glabrous region on ventrites 2-5.

   ...3

  
#3 Habitus [fig.5]. Antenna! cupule with little to moderate elongation ca. l.2-2x as long as wide. Abdominal glabrous region as in [fig.6]. Fifth protarsomere of the male expanded [fig.7], but with a distinctly obtuse angle. Aedoeagus [fig.8]. Continental United States, southern half of Canada, and northern Mexico.

     ...triangularis Say, 1823
HYDROPHILUS TRIANGULUS
fig.5		HYDROPHILUS TRIANGULARIS
fig.6
HYDROPHILUS TRIANGULARIS
fig.7		HYDROPHILUS TRIANGULUS
fig.8
-- Habitus [fig.9]. Antennal cupule greatly elongated ca. three times as long as wide. Abdominal glabrous region as in [fig.10]. Fifth protarsornere in males greatly expanded [fig.11], the plate exhibiting a nearly right angle. Aedoeagus [fig.12]. Arizona, California, Texas, and Florida in the United States, Mexico, Central America, West Indies, and northern South America.

     ...insularis Castelnau, 1840
HYDROPHILUS INSULARIS
fig.9		HYDROPHILUS INSULARIS
fig.10
HYDROPHILUS INSULARIS
fig.11		HYDROPHILUS INSULARIS
fig.12
  ensifer
insularis
 triangularis
Dibolocelus
Bachmann, A.O. (1964): El genero Dibolocelus in Argentina (Coleoptera, Hydrophilidae - Revista de la Sociedad Entomológica Argentina 27:65-72 Private Datei: F:\taxa\coleo\scans\_Neue Welt\Bachmann1964 Dibolocelus Argentinien.pdf
Arce-Pérez, R. & Morón, M. (2013): El género Hydrophilus (Coleoptera: Hydrophilidae: Hydrophilina) en México y Centroamérica - Revista Mexicana de Biodiversidad 84: 140-152 Private Datei: F:\TAXA\coleo\Scans\_Neue Welt\Arce-Perez&Moron2013 Hydrophilus Zentralamerika.pdf
Short, A:E:Z & McIntosh IV, C.E. (2014): Review of the Giant Water Scavenger Beetle Genus Hydrophilus Geoffroy (Coleoptera: Hydrophilidae) of the United States and Canada - The Coleopterists Bulletin 68(2): 137-198 Private Datei: F:\TAXA\coleo\Scans\_Neue Welt\Short&McIntosh2014 Hydrophilus NA Key.pdf
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First prepared: 25.02.2022
Latest edit: 26.02.2022 - 00:52:56
Version: 4.2.2 by: Arved Lompe
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