Taxon profile
species
Opisthostoma ballorum J.J. Vermeulen, 1991
kingdom Animalia - animals » phylum Mollusca - mollusks » class Gastropoda - gastropods » order Architaenioglossa » family Diplommatinidae » genus Opisthostoma
ID: 1652672
pID: 653058
Taxonomic rank: 150
Author of the record: Delsing Jan
Created: 2021-06-06 22:12:55 - User Delsing Jan
Data last updated: 2021-06-06 22:12:57
URL: https://www.biolib.cz/en/taxon/id1652672/
Text function: [[t:1652672;<em>Opisthostoma ballorum</em>]]
[[t:1652672;<em>Opisthostoma ballorum</em>]] J.J. Vermeulen, 1991
Reference: <a href="https://www.biolib.cz/en/taxon/id1652672/"><em>Opisthostoma ballorum</em></a>
pID: 653058
Taxonomic rank: 150
Author of the record: Delsing Jan
Created: 2021-06-06 22:12:55 - User Delsing Jan
Data last updated: 2021-06-06 22:12:57
URL: https://www.biolib.cz/en/taxon/id1652672/
Text function: [[t:1652672;<em>Opisthostoma ballorum</em>]]
[[t:1652672;<em>Opisthostoma ballorum</em>]] J.J. Vermeulen, 1991
Reference: <a href="https://www.biolib.cz/en/taxon/id1652672/"><em>Opisthostoma ballorum</em></a>
Data source: World Wide Mollusc Species Data Base.
Interchangeable taxa
Author: Jan Delsing
Text ID: 109584
Text Type: 19
Page: 0
Created: 2021-06-07 11:06:30 - User Delsing Jan
Language: EN
Text function: [[t:1652672,textblock=109584,elang=EN;Interchangeable taxa]]
Text ID: 109584
Text Type: 19
Page: 0
Created: 2021-06-07 11:06:30 - User Delsing Jan
Language: EN
Text function: [[t:1652672,textblock=109584,elang=EN;Interchangeable taxa]]
1. Specimens from the 1st. Divison of Sarawak differ from sympatric specimens of O. brachyacrum lambii without a longitudinal parietalis in having the radial ribs on the portion of the spire ending on the constriction much wider spaced (2-6 radial ribs/0.5 mm in 0. ballorum; 8-15 in O. brachyacrum lambii).
2. Specimens of 0. ballorum from the 4th. Division of Sarawak, excluding Batu Gading, differ from those from the 1st. Division, and from those from Batu Gading in the 4th. Division, in having the radial ribs on the penultimate whorl of the spire somewhat wider spaced: 7-12 radial ribs/0.5 mm in the 1st. Div.; 5-7 radial ribs/0.5 mm in the 4th. Div. 0. brachyacrum brachyacrum from the 4th. Division with a relatively low spire and a narrow umbilicus is very similar to sympatric specimens of 0. ballorum. It is possible that these specimens of 0. ballorum represent in fact a form of 0. brachyacrum brachyacrum lacking the longitudinal parietalis.
3. 0. javanicum may look similar; see the notes under that species.
2. Specimens of 0. ballorum from the 4th. Division of Sarawak, excluding Batu Gading, differ from those from the 1st. Division, and from those from Batu Gading in the 4th. Division, in having the radial ribs on the penultimate whorl of the spire somewhat wider spaced: 7-12 radial ribs/0.5 mm in the 1st. Div.; 5-7 radial ribs/0.5 mm in the 4th. Div. 0. brachyacrum brachyacrum from the 4th. Division with a relatively low spire and a narrow umbilicus is very similar to sympatric specimens of 0. ballorum. It is possible that these specimens of 0. ballorum represent in fact a form of 0. brachyacrum brachyacrum lacking the longitudinal parietalis.
3. 0. javanicum may look similar; see the notes under that species.
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
Links and literature
bin Marzuki ME, Liew T-S, Mohd-Azlan J (2021): Land snails and slugs of Bau limestone hills, Sarawak (Malaysia, Borneo), with the descriptions of 13 new species, ZooKeys 1035: 1-113 [as Opisthostoma ballorum Vermeulen, 1991]