Gattung in ColKat anzeigen Genus Hydrophilus subgenus Dibolocelus Coleoptera - Hydrophilidae
  By Arved Lompe (after A.O. Bachmann)
If you find any errors or omissions please mail me at mailbox@lompe.de 		 References =>
#1 Wide shape [fig.1], generally black color, with greenish, non-metallic reflections.

   ...2
HYDROPHILUS PURPURASCENS
fig.1		 
-- Narrower shape, tarsi II, in both sexes, approximately 1.5 times the tibia. ♂: labial palp not triangular; anterior tibial spurs like figuras 2 and 5. ♀: femurs II with dense stippling.

   ...4

  
#2 ♂: Maxillar palpes [fig.2]. 2nd part of the labial palp expanded in a triangle [fig.3]; tarsi II disproportionately long (twice as the tibia); genitalia as [fig.4]; tarsus I and tibial spurs as [fig.5]. ♀: labial palp as [fig.3]; 2nd article 4/5 of the 1st; femurs II with sparse stippling. South America.

     ...masculinus Régimbart
HYDROPHILUS MASCULINUS
fig.2		HYDROPHILUS MASCULINUS
fig.3
HYDROPHILUS MASCULINUS
fig.4		HYDROPHILUS MASCULINUS
fig.5
-- Palpes different. Central and North America

   ...3

  
#3 Maxillary palpes of males modified with third segment flattend and widened. Protarsal claws of ♂ enlarged but subequal in size and shape. Fifth protarsal segment slightly widened in ♂. Eastern United States. eastern coast of Mexico, and extreme southeastern Canada. 30-35 mm.

     ...ovatus Gemminger & Harold, 1868


This species is not mentioned for Mexico by Arce-Pérez & Moron (l.c.) 		 
-- Habitus [fig.1]. Maxillary palps of ♂ with second and third inflated segments (globose); the third deeply excavated ventrally; abdomen with ventrite 4 raised on the center as a thick, glabrous keel, the fifth sharply raised and with a broad subtriangular glabrous area; the keel of 4th ventrite projects slightly over 5th. Aedoeagus [fig.6]. Overall length 35-38mm.

     ...purpurascens Régimbart, 1901
HYDROPHILUS PURPURASCENS
fig.1		HYDROPHILUS PURPURASCENS
fig.6
#4 Shape pointed behind, generally green color with iridescent reflections (sometimes almost black). ♂: Tarsus I [fig.7]. Maxillar palpes [fig.8]. 2nd labial palp joint clubbed [fig.9]; last segment of maxillary palp approximately 4/5 of the previous one, the latter little less than the 2nd; genitalia as [fig.10]. ♀: 2nd labial palp segment obliquely truncated [fig.9], 3rd segment 2/3 of the 2nd.

     ...iricolor Régimbart
HYDROPHILUS IRICOLOR
fig.7		HYDROPHILUS IRICOLOR
fig.8
HYDROPHILUS IRICOLOR
fig.9		HYDROPHILUS IRICOLOR
fig.10
-- Shape less sharp behind, color generally black, sometimes with greenish, non-metallic reflections. ♂: Tarsus I [fig.11]. Maxillar palpes [fig.12]. 2nd subparallel labial palp segment [fig.13]; last segment of maxillary palp a little more than half of the penultimate, the latter clearly smaller than the 2nd; genitalia as [fig.14]. ♀: 2nd subparallel labial palp joint [fig.13], 3rd segment 4/5 of the 2nd.

     ...palpalis (Brullé)
HYDROPHILUS PALPALIS
fig.11		HYDROPHILUS PALPALIS
fig.12
HYDROPHILUS PALPALIS
fig.13		HYDROPHILUS PALPALIS
fig.14
  iricolor
masculinus
 ovatus
palpalis
purpurascens
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 - 00:52:34
Version: 4.2.1 by: Arved Lompe
Vorherige Version
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