ERATOTRIVIA CRESCENTENSIS

Groves, Lindsey & Squires, Richard L., 2023, Revision of northeast Pacific Paleogene cypraeoidean gastropods, including recognition of three new species: implications for paleobiogeographic distribution and faunal turnover, PaleoBios 40 (10), pp. 1-52 : 37-38

publication ID	https://doi.org/ 10.5070/P9401057774
publication LSID	lsid:zoobank.org:pub:11600574-2B0E-4C13-BC08-A3A5EF9EE562
persistent identifier	https://treatment.plazi.org/id/921FD94C-FFF5-FF8F-FC4C-FBA5FE91FBE3
treatment provided by	Felipe
scientific name	ERATOTRIVIA CRESCENTENSIS
status

Treatment

( WEAVER AND PALMER, 1922)

FIGS. 10G–I

Eratopsis crescentensis Weaver and Palmer, 1922 View in CoL . p. 36, 37, pl. 11, figs. 10, 22. Weaver, 1942 [1943]. p. 393, 645 (table), pl. 76, fig. 21.

Eratotrivia crescentensis (Weaver and Palmer) View in CoL . Schil- der, 1932. p. 81 [as E. crescentensis View in CoL ]. Schilder, 1933. p. 276. Schilder, 1961. p. 149. Schilder and Schilder, 1971. p. 12, 108. Squires and Goedert, 1994. p. 16, 18, figs. 37, 38.

Holotype and Type Locality — CASG 7587 [ex UWBM 201 View Materials ] (Figs. 10G–I), length 6 mm, width 4 mm, height 3.5 mm. UWBM Locality 358, Crescent Formation , at Cres- cent Bay, Clallam County, northern Olympic Peninsula , Washington ( Weaver 1942 [1943]: p. 393).

Referred Specimens—Hypotype (of Squires and Goedert, 1994) LACMIP 16657.24 , LACMIP Type 12162 [not 12228, as reported by Squires and Goedert (1994: pp. 16, 18)], length 4.86 mm, width 3.55 mm, and two additional specimens, LACMIP 16657 [= LACMIP Local- ity 41553; ex CSUN Locality 1553], Crescent Formation, Little River area , Grays Harbor County, Washington. Two specimens ( LACMIP 41563.1 , LACMIP Type 14947) from LACMIP Locality 41563 [ex CSUN Locality 1563], Crescent Formation , Larch Mountain area , Black Hills , Thurston County, southwestern Washington and one specimen ( LACMIP 41553.1 , LACMIP Type 14948) from LACMIP Locality 41553 [ex CSUN Locality 1553], also from the Larch Mountain area , Black Hills , Thurston County, Washington. Hypotypes UWBM IP 98539 View Materials (two specimens) .

Occurrence— Lower Eocene, Washington. “Capay Stage”: Crescent Formation, Crescent Bay, Washington ( Weaver and Palmer 1922); Crescent Formation, Little River, Grays Harbor County, southern Olympic Peninsula, Washington ( Squires and Goedert 1994).

Etymology— Originally named for the Eocene Cres- cent Formation, Clallam County, northwestern Wash- ington.

Description —Shell small and entirely covered with numerous oblique spiral ribs uniform in strength and extending into both lips; moderate convexity; posterior end flattish, anterior end protruding and tapered. Aper- ture moderately straight, widest just anterior to middle of shell. Outer lip inflated.

Remarks— Eratotrivia crescentensis is the only known trivid in the Paleogene deposits of the NEP region. Speci- mens are small and uncommon. They show reasonably good preservation.