Profil taxonu
Obrázky
Autor: Robba et al.
Popis
(As Gabbia wykoffi)
A single fossil specimen characterized by 1) broadly ovate shell 4.2 mm high, 2) spire low-conical, whorls convex, meeting at slightly impressed sutures, 3) body whorl large, oval, about 75% of total height, base convex with exceedingly narrow umbilical chink, 4) aperture oval, angular adapically, peristome rather thick, 5) operculum with paucispiral nucleus and concentric growth markings, 6) outer surface bearing growth lines and very faint spiral striation. The related Gabbia pygmaea (Preston, 1908) differs in being smaller with more deeply impressed sutures and lacking the spiral striation.
A single fossil specimen characterized by 1) broadly ovate shell 4.2 mm high, 2) spire low-conical, whorls convex, meeting at slightly impressed sutures, 3) body whorl large, oval, about 75% of total height, base convex with exceedingly narrow umbilical chink, 4) aperture oval, angular adapically, peristome rather thick, 5) operculum with paucispiral nucleus and concentric growth markings, 6) outer surface bearing growth lines and very faint spiral striation. The related Gabbia pygmaea (Preston, 1908) differs in being smaller with more deeply impressed sutures and lacking the spiral striation.
Robba et al, 2003. Holocene and Recent shallow soft-bottom mollusks from the northern Gulf of Thailand area: Scaphopoda, Gastropoda, additions to Bivalvia.
Rozšíření
DISTRIBUTION AND HABITAT. The species is restricted to Thailand. It dwells in mud in freshwater swamps and rice fields.
Robba et al, 2003. Holocene and Recent shallow soft-bottom mollusks from the northern Gulf of Thailand area: Scaphopoda, Gastropoda, additions to Bivalvia.
Autor: Jan Delsing
Odkazy a literatura
IUCN Red List of Threatened Species 2024-1 [184866]
IUCN Red List of Threatened Species [http://www.iucnredlist.org/] [jako Bithynia wykoffi Brandt, 1968]
Datum citace: 29. leden 2024
Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [jako Bithynia wykoffi Brandt, 1968]Datum citace: 22. listopad 2013