Bivalvia - Cardiidia - Sanguinolitidae

Alternative combination: Goniomya singaporensis

Synonyms: Allorisma insolitum Thomas 1928, Goniomya scrivenori Newton 1906, Goniomya uhligi Holdhaus 1913, Sanguinolites insolitus Thomas 1928, Undulomya pleiopleura Fletcher 1946

Full reference: R. B. Newton. 1906. Notice of some fossils from Singapore discovered by John B. Scrivenor, FGS, geologist to the Federated Malay States. Geological Magazine, New Series, Decade V 3:487-496

Belongs to Undulomya according to N. J. Morris et al. 1991

Sister taxon: Undulomya rugulata

Type specimens:

• Undulomya singaporensis: BM L19154. Its type locality is Mount Guthrie, Tanjong Pagar, which is in an Artinskian/Roadian marine mudstone in Singapore.
• Allorisma insolitum:
• Goniomya scrivenori: Its type locality is Mount Guthrie, Tanjong Pagar, which is in an Artinskian/Roadian marine mudstone in Singapore.
• Goniomya uhligi:
• Undulomya pleiopleura: UWA WF10.1A, a valve (Right valve). Its type locality is UWA WF10.1, Coolkilya Flat, Wandagee Hill, which is in a Roadian coastal siliciclastic in the Coolkilya Formation of Australia.

Ecology: facultatively mobile infaunal suspension feeder

Average measurements (in mm): shell 55.8 x 16.4, valve 81.5 x 30.0