Bivalvia - Nuculida - Nuculidae
Alternative combination: Nucula decisa
Synonyms: Acila gabbiana Dickerson 1916, Acila lajollaensis Hanna 1927, Nucula (Acila) stillwaterensis Weaver and Palmer 1922
Full reference: T. A. Conrad. 1855. Report Of Mr. T. A. Conrad On The Fossil Shells Collected In California By Wm. P. Blake, Geologist Of The Expedition Under The Command Of Lieutenant R. S. Williamson, United States Topographical Engineers. Description of the fossils and shells collected in California by William P. Blake, Geologist of the United States Pacific Railroad Survey in California. under the command of Lieut. R. S. Williamson, In 1853-54. Article 1 of Appendix to the Preliminary Geological Report of WIlliam P. Blake, Geologist of the Survey in California Under the Command of Lieut. R. S. Williamson. Palæontology 5-21
Belongs to Acila (Truncacila) according to E. J. Moore 1983
See also Conrad 1855, Hanna 1927, Squires 1984, Squires 1987, Squires 1988, Squires 1999, Turner 1938, Vokes 1939 and Weaver and Palmer 1922
Sister taxa: Acila (Truncacila) allisoni, Acila (Truncacila) bellula, Acila (Truncacila) bivirgata, Acila (Truncacila) blancoensis, Acila (Truncacila) castrensis, Acila (Truncacila) cobboldae, Acila (Truncacila) conradi, Acila (Truncacila) dalli, Acila (Truncacila) demessa, Acila (Truncacila) galinae, Acila (Truncacila) grahami, Acila (Truncacila) haidana, Acila (Truncacila) hokkaidoensis, Acila (Truncacila) jucunda, Acila (Truncacila) moneronica, Acila (Truncacila) muta, Acila (Truncacila) nagaoi, Acila (Truncacila) osugii, Acila (Truncacila) princeps, Acila (Truncacila) rosaria, Acila (Truncacila) schencki, Acila (Truncacila) shumardi
Type specimens:
- Acila (Truncacila) decisa: UCMP 31132 (neotype)
- Acila gabbiana: Its type locality is UCMP 1817, Urruttia Canyon-Salt Creek, which is in a Ypresian deep-water shale in the Lodo Formation of California.
- Acila lajollaensis: UCMP 31132 (neotype), a valve. Its type locality is UCR loc. 4922, which is in a Lutetian deep subtidal shelf shale in the Ardath Formation of California.
- Nucula (Acila) stillwaterensis: UW (unknown number), a shell. Its type locality is UW 319, which is in a Bartonian marine horizon in the Cowlitz Formation of Washington.
Distribution:
• Eocene of the Russian Federation (2 collections), United States (39: California, Oregon, Washigton, Washington)
• Paleocene of the Russian Federation (1), United States (6: California)
Total: 48 collections including 49 occurrences
Specimen images are retrieved through the ePANDDA API.
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