Dibolocelus Bedel, 1891: 309
Giant water scavenger beetles Hydrophilus subgenus Dibolocelus (Coleoptera Hydrophilidae) from Mexico with description of two new species
Arce-Pérez, Roberto
Arriaga-Varela, Emmanuel
Novelo-Gutiérrez, Rodolfo
Navarrete-Heredia, José L.
Zootaxa
2021
2021-09-01
5027
3
387
407
Bedel, 1891
Bedel
1891
[151,624,1757,1784]
Liliopsida
Restionaceae
Hydrophilus
Plantae
Poales
1
388
Tracheophyta
subGenus
Dibolocelus
Dibolocelus Bedel, 1891: 309.
Typespecies: Hydrophilus palpalis Brullé, 1837 .
Diagnosis.In addition to the characters for the genus ( Short 2010), adult Hydrophilus( Dibolocelus)can be differen- tiated from those of Hydrophilus( s. str.) by a more convex and robust body shape; maxillary palps usually modified being generally longer, broadened and curved towards apex, sometimes inflated and curved at mid-length, with third palpomere with deep and wide ventral excavation or flat and slightly widened towards the apex; labial palp widely triangular and inflated, clavate or subparallel in shape, with or without setae on lateral margins; fifth protarsomere wide and longer than any of the previous ones, sometimes slightly flattened and with a ventral laminar expansion, never as large as those in Hydrophilus( s.str.); internal spur of anterior tibia flat, sub-rectangular or rounded, with straight or curved external margins, if sub-rectangular then it can be short or long with its apex straight, irregular or clearly bifid; abdominal ventrites 3 and 4 have slight to well-marked oval, glabrous area at mid-line, and ventrite 5 has a wide oblong or sub-triangular glabrous area; ventrites 3 to 5 slightly raised at midline, flattened or forming a keel, slightly projected above ventrite posterior margin.