Synonyms and other taxonomic changes
Includes the former Agabus seriatus
. The following Nearctic Agabus
species are now classified under Ilybiosoma
: A. perplexus
, A. ilybiiformis
, A. pandurus
, A. brevicollis
, A. regularis
, A. lugens
, A. roguus
, A. minnesotensis
, and A. seriatus
(as I. seriatum
). See Nilsson (2001) for more details.
With the exception of I. seriatum, it is generally difficult to separate the species based on external characters alone- dissection and examination of male genitalia are usually needed.
Mainly western with center of diversity in the southwest (1)
; only I. seriatum
is transcontinental and thus the only one found in the east (1)
Lotic, in streams and springs (1)
Nilsson, Anders N. 2001. World Catalogue of Insects, volume 3: Dytiscidae (Coleoptera) Apollo Books, 395 pp.