Table 1 in Review of Coelostoma of the Indian subcontinent (Coleoptera: Hydrophilidae) Part 1: Coelostoma s. str. and Holocoelostoma

Table 1. Characters defining the subgenera of Coelostoma Brullé, 1935 as used in this study. Only the subgenera Lachnocoelostoma Mouchamps, 1958, Coelostoma s. str. and Holocoelostoma Mouchamps, 1958 occur in the Indian subcontinent.
CharacterLachnocoelostomaCoelostoma s. str.HolocoelostomaHammacoelostomathick and stronglysclerotized (resemblingEmpodial setaefine, hair-likefine, hair-likefine, hair-likean additional pairof massive spinesbetween tarsal claws)with dense pubescencepresent on the wholecompletelycompletelyMesofemursurface or at least in the anterior part of the mesofemur (i.e., mesofemur can bewithout dense long pubescence, only with sparsely arranged shortwithout dense long pubescence, only with sparsely arranged shortwith dense pubescence present on anterior two thirdslargely bare in somesetaesetaespecies!)Abdominal ventrite 1with or without median carinanever with median carinanever with median carinawithout median carinaAbdominal apex: stout setaeusually present, absent in few speciesalways absentalways presentabsent or presentAbdominal apex: emarginationpresent or absentalways absentpresent or absentabsent