A new Pseudovertagus (Cerithiidae; Caenogastropoda; Mollusca) from the Lower Pleistocene of the Philippines, with notes on Sabia-hermit crab associations

抄録

Pseudovertagus canudai sp. nov. is described on the basis of a single specimen from the Pleistocene Tuktuk Formation in Leyte, Philippines. This represents the second extinct species of Pseudovertagus. Pseudovertagus canudai sp. nov. most closely resembles the rare living species Pseudovertagus phylarchus but can be distinguished by its smaller shell, the presence of finely incised spiral grooves on the last three whorls, and the slightly prosoclinal axial ribs on the early spire whorls. The shell bears rounded pits, which were most likely excavated by the co-occurring hipponicid gastropod Sabia while it was occupied by a hermit crab. This is the second fossil example of a Sabia-hermit crab association from an offshore soft-bottom environment.

ZooBank registration: urn:lsid:zoobank.org:pub:1DAECF2A-8B12-43D5-BD47-14F7F915F787