Taxon profile
subspecies
Opisthostoma brachyacrum tatauense J.J. Vermeulen, 1994
kingdom Animalia - animals » phylum Mollusca - mollusks » class Gastropoda - gastropods » order Architaenioglossa » family Diplommatinidae » genus Opisthostoma » species Opisthostoma brachyacrum
ID: 1652705
pID: 1652657
Taxonomic rank: 153
Author of the record: Delsing Jan
Created: 2021-06-07 10:35:57 - User Delsing Jan
Data last updated: 2021-06-07 10:36:00
URL: https://www.biolib.cz/en/taxon/id1652705/
Text function: [[t:1652705;<em>Opisthostoma brachyacrum tatauense</em>]]
[[t:1652705;<em>Opisthostoma brachyacrum tatauense</em>]] J.J. Vermeulen, 1994
Reference: <a href="https://www.biolib.cz/en/taxon/id1652705/"><em>Opisthostoma brachyacrum tatauense</em></a>
pID: 1652657
Taxonomic rank: 153
Author of the record: Delsing Jan
Created: 2021-06-07 10:35:57 - User Delsing Jan
Data last updated: 2021-06-07 10:36:00
URL: https://www.biolib.cz/en/taxon/id1652705/
Text function: [[t:1652705;<em>Opisthostoma brachyacrum tatauense</em>]]
[[t:1652705;<em>Opisthostoma brachyacrum tatauense</em>]] J.J. Vermeulen, 1994
Reference: <a href="https://www.biolib.cz/en/taxon/id1652705/"><em>Opisthostoma brachyacrum tatauense</em></a>
Data source: World Wide Mollusc Species Data Base.
Images
Author: Vermeulen, J.J.
Description
Author: Jan Delsing
Text ID: 109581
Text Type: 1
Page: 0
Created: 2021-06-07 10:48:29 - User Delsing Jan
Language: EN
Text function: [[t:1652705,textblock=109581,elang=EN;Description]]
Text ID: 109581
Text Type: 1
Page: 0
Created: 2021-06-07 10:48:29 - User Delsing Jan
Language: EN
Text function: [[t:1652705,textblock=109581,elang=EN;Description]]
Material seen. — SARAWAK. 4th Div.: Bt. Sarang, Tatau Valley (leg. Bong, UF 194756/2; do. 194757/8; do. 194772/MO, incl. HOLOTYPE; do. 194921/1; do. 194922/MO; do. 194923/6; do. 194924/1; do. 194925/1).
As the type subspecies, but constriction usually with a parietalis which continues up to or slightly beyond the sharp inner curve of the tuba, and which is low and incon¬spicuous, (or even absent) at the constriction, but high and distinct half-way the tuba, without an angularis. Spire with 6 radial ribs/0.5 mm on the penultimate whorl; tuba with 5-20 ribs/0.5 mm half-way. Umbilicus closed, or open, up to 0.05 mm wide. Spire: height 0.7-0.8 mm; width 0.7 mm; index 1.0-1.2. Total width 1.0-1.1 mm. Height and width aperture 0.30 mm.
Distribution. — Sarawak. 4th Div. Tatau River basin.
Notes: — In the type subspecies the umbilicus is usually wider, being 0.05-0.25 mm across.
As the type subspecies, but constriction usually with a parietalis which continues up to or slightly beyond the sharp inner curve of the tuba, and which is low and incon¬spicuous, (or even absent) at the constriction, but high and distinct half-way the tuba, without an angularis. Spire with 6 radial ribs/0.5 mm on the penultimate whorl; tuba with 5-20 ribs/0.5 mm half-way. Umbilicus closed, or open, up to 0.05 mm wide. Spire: height 0.7-0.8 mm; width 0.7 mm; index 1.0-1.2. Total width 1.0-1.1 mm. Height and width aperture 0.30 mm.
Distribution. — Sarawak. 4th Div. Tatau River basin.
Notes: — In the type subspecies the umbilicus is usually wider, being 0.05-0.25 mm across.
Vermeulen, J.J., 1994. Notes on the non-marine molluscs of the island of Borneo 6. The genus Opisthostoma (Gastropoda Prosobranchia: Diplommatinidae), part 2
Author: Jan Delsing