Coelostoma
Coelostoma is a genus of beetles belonging to the family Hydrophilidae. The genus was first described by Brullé in 1835. The genus has cosmopolitan distribution, with 111 described species, representing one of the most diverse genera of Hydrophilidae.
Description
Body rather convex, brown to black. Eyes are medium in size, and deeply excised internally. Antenna consists with 9 antennomeres, and loosely segmented antennal club. Mesoventrite consists with an arrow-head shaped median elevation. Metaventrite is longer than mesoventral elevation. There are strongly raised median portion in Metaventrite broadly projecting anteriorly which become abutted to mesoventral process. Elytra lacking serial punctures.
Species
These 123 species belong to the genus Coelostoma:Coelostoma aeneolum Régimbart, 1903Coelostoma aethiopicum Orchymont, 1936Coelostoma afflatum Knisch, 1922Coelostoma alluaudi Mouchamps, 1958Coelostoma anthracinum J.Balfour-Browne, 1939Coelostoma assinicum Mouchamps, 1958Coelostoma austrine Mouchamps, 1958Coelostoma balfourbrownei M.Hansen, 1999Coelostoma bannanicum Mai et al., 2022Coelostoma basilewskyi Mouchamps, 1958Coelostoma bechynei J.Balfour-Browne, 1959Coelostoma bhutanicum Jayaswal, 1972Coelostoma bibilense Hebauer, 2000Coelostoma bifidum Jia et al., 2014Coelostoma bipunctatum Jayaswal, 1972Coelostoma brachaurum Mouchamps, 1958Coelostoma brownei Mouchamps, 1958Coelostoma brunneum Mouchamps, 1958Coelostoma bullosum Mouchamps, 1958Coelostoma camerunense Mouchamps, 1958Coelostoma centrale Mouchamps, 1958Coelostoma collarti Mouchamps, 1958Coelostoma conradsi Orchymont, 1936Coelostoma coomani Orchymont, 1932Coelostoma cooptatum Orchymont, 1932Coelostoma coortum Orchymont, 1932Coelostoma dactylopunctum Mai et al., 2022Coelostoma dentatum Knisch, 1924Coelostoma deplexum J.Balfour-Browne, 1950Coelostoma diversum Orchymont, 1932Coelostoma dolum J.Balfour-Browne, 1950Coelostoma ealanum Orchymont, 1941Coelostoma edwardsi J.Balfour-Browne, 1940Coelostoma erinna J.Balfour-Browne, 1950Coelostoma escalerai Hernando, 1997Coelostoma fabricii Coelostoma fallaciosum Orchymont, 1936Coelostoma fortunum Mai et al., 2022Coelostoma freudei Mouchamps, 1958Coelostoma freyi Mouchamps, 1958Coelostoma gentilii Jia et al., 2014Coelostoma hajeki Jia et al., 2014Coelostoma himalayanum Hebauer, 2002Coelostoma hirsutum Mouchamps, 1958Coelostoma hispanicum Coelostoma homalinum Hebauer, 2002Coelostoma hongkongense Jia et al., 2014Coelostoma horni Coelostoma huangi Jia et al., 2014Coelostoma injuratum J.Balfour-Browne, 1952Coelostoma insidiosum Mouchamps, 1958Coelostoma insolitum Orchymont, 1936Coelostoma irregulare Hebauer, 2001Coelostoma jaculum Jia et al., 2019Coelostoma jaechi Jia et al., 2017Coelostoma jeanneli Mouchamps, 1958Coelostoma kantnerorum Hebauer, 2006Coelostoma lamottei J.Balfour-Browne, 1958Coelostoma lazarense Orchymont, 1925Coelostoma lemuriense Mouchamps, 1958Coelostoma leonense J.Balfour-Browne, 1939Coelostoma lesnei Orchymont, 1936Coelostoma lyratum Sheth, Ghate & Fikáček, 2020Coelostoma marshalli J.Balfour-Browne, 1950Coelostoma martensi Hebauer, 2002Coelostoma medianum Hebauer, 2002Coelostoma mixtum Mai et al., 2022Coelostoma mocquerysi Orchymont, 1936Coelostoma montanum Mouchamps, 1958Coelostoma mouchampsi M.Hansen, 1999Coelostoma nankunshanense Mai et al., 2022Coelostoma neavei J.Balfour-Browne, 1950Coelostoma nostocinum Sheth, Ghate & Fikáček, 2020Coelostoma oceanicum Mouchamps, 1958Coelostoma optatum J.Balfour-Browne, 1952Coelostoma orbiculare Coelostoma orchymonti Mouchamps, 1958Coelostoma orientale Mouchamps, 1958Coelostoma parkeri Mouchamps, 1958Coelostoma phalacroides Régimbart, 1903Coelostoma phallicum Orchymont, 1940Coelostoma phototropicum Jia et al., 2019Coelostoma picturatum Orchymont, 1936Coelostoma protervum J.Balfour-Browne, 1959Coelostoma proximum Mouchamps, 1958Coelostoma pseudomartensi Mai et al., 2022Coelostoma punctulatum Coelostoma remotum Mouchamps, 1958Coelostoma rhodesiense J.Balfour-Browne, 1950Coelostoma rhomphea Orchymont, 1936Coelostoma rohani Orchymont, 1931Coelostoma rubens Hebauer, 2002Coelostoma rubiginosum J.Balfour-Browne, 1950Coelostoma rufitarse Coelostoma rusticum Orchymont, 1936Coelostoma rutarum Orchymont, 1936Coelostoma salvazai Orchymont, 1919Coelostoma segne J.Balfour-Browne, 1952Coelostoma simulans Orchymont, 1925Coelostoma solitarium Mouchamps, 1958Coelostoma stultum Coelostoma subditum Orchymont, 1936Coelostoma subsphaeroides Coelostoma subtile Orchymont, 1936Coelostoma sulcatum Pu & Zhe-Long, 1963Coelostoma surkhetense Hebauer, 2002Coelostoma syriacum Orchymont, 1936Coelostoma taiwanense Liu et al., 2020Coelostoma tangliangi Jia et al., 2017Coelostoma thienemanni Orchymont, 1932Coelostoma tina Spangler & Steiner, 2003Coelostoma togoense Hebauer, 2003Coelostoma tortuosum J.Balfour-Browne, 1959Coelostoma transcaspicum Reitter, 1906Coelostoma trilobum G.Müller, 1942Coelostoma turnai Hebauer, 2006Coelostoma vagum Orchymont, 1940Coelostoma vitalisi Orchymont, 1923Coelostoma vividum Orchymont, 1936Coelostoma waterstradti Orchymont, 1936Coelostoma wittei J.Balfour-Browne, 1950Coelostoma wui Orchymont, 1940Coelostoma zumpti Orchymont, 1937