Geotrochus Van Hasselt, 1823

Vermeulen, Jaap J., Liew, Thor-Seng & Schilthuizen, Menno, 2015, Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species, ZooKeys 531, pp. 1-139: 100

publication ID

http://dx.doi.org/10.3897/zookeys.531.6097

publication LSID

lsid:zoobank.org:pub:C845838E-C912-4BD8-AB4E-07980F91959E

persistent identifier

http://treatment.plazi.org/id/80B7189E-BEDE-846E-AA33-2DE6D6C7002E

treatment provided by

ZooKeys by Pensoft

scientific name

Geotrochus Van Hasselt, 1823
status

 

Taxon classification Animalia Stylommatophora Trochomorphidae

Genus Geotrochus Van Hasselt, 1823 

Geotrochus  Van Hasselt, 1823: 233.

Diagnosis for the Sabah species.

Shell rather small to medium-sized, (pale) corneous to (yellowish) brown, without any colour patterns, or with brown spiral bands ( Geotrochus spilokeiria  with additional white spots and stains); (low) conical with concave, flat or convex sides, apex protruding or not. Radial sculpture above the periphery inconspicuous to distinct growth lines, raised at irregular intervals or not. Spiral sculpture consisting of thin threads, at least some spiral threads close to the periphery usually slightly coarser, the others very fine, often inconspicuous or absent; no spiral sculpture below the periphery. Umbilicus closed, entirely covered by an extension of the parietal callus of the peristome.

Remarks.

We provide a review of the Sabah species of Geotrochus  . We divide the genus into three informal groups.