Gattung in ColKat anzeigen Genus Hydrophilus - New World Coleoptera - Hydrophilidae
  By Arved Lompe (rearranged after Short & McIntosh)
If you find any errors or omissions please mail me at mailbox@lompe.de 		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
#1 Abdomen with glabrous region limited to the medial line of ventrites 3-5 [Abb.1]. Prosternum divided into lateral halves for the reception of the anterior portion of the sternal keel. Dorsal surface sometimes appearing greenish. Eastern United States. eastern coast of Mexico, and extreme southeastem Canada. (Dibolocelus).

     ...ovatus
HYDROPHILUS OVATUS
Abb.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.

   ...2

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

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

   ...3

  
#3 Antenna! cupule with little to moderate elongation ca. l.2-2x as long as wide. Abdominal glabrous region as in [Abb.3]. Fifth protarsomere of the male expanded [Abb.4], but with a distinctly obtuse angle. Continental United States, southern half of Canada, and northern Mexico.

     ...triangularis
HYDROPHILUS TRIANGULARIS
Abb.3		HYDROPHILUS TRIANGULARIS
Abb.4
-- Antennal cupule greatly elongated ca. three times as long as wide. Abdominal glabrous region as in [Abb.5]. Fifth protarsornere in males greatly expanded [Abb.6], the plate exhibiting a nearly right angle. Arizona, California, Texas, and Florida in the United States, Mexico, Central America, West Indies, and northern South America.

     ...insularis
HYDROPHILUS INSULARIS
Abb.5		HYDROPHILUS INSULARIS
Abb.6
  ensifer
insularis
 ovatus
triangularis
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First prepared: 4.2.1 Latest edit: 25.02.2022 - 11:37:46 Arved Lompe
Latest edit: 25.02.2022 - 11:39:06
Version: 4.2.1 by: Arved Lompe
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