Neocrassina californica ( Stanton, 1895 ),

Kaim, Andrzej, Jenkins, Robert G., Tanabe, Kazushige & Kiel, Steffen, 2014, Mollusks from late Mesozoic seep deposits, chiefly in California, Zootaxa 3861 (5), pp. 401-440: 429

publication ID

http://dx.doi.org/10.11646/zootaxa.3861.5.1

publication LSID

lsid:zoobank.org:pub:E62DB6C3-0C5F-4898-99C4-1BEC70DD1734

persistent identifier

http://treatment.plazi.org/id/03F4372E-FFFA-6853-FF34-0081FE79FE88

treatment provided by

Plazi

scientific name

Neocrassina californica ( Stanton, 1895 )
status

 

Neocrassina californica ( Stanton, 1895) 

( Fig. 15View FIGURE 15)

Astarte californica Stanton, 1895  , p. 57, pl. 6, figs. 19–21.

Supplementary description. Escutcheon symmetrical, broad lanceolate, bounded by sharp ridge, commarginal sculpture of shell surface continues only faintly inside the escutcheon; lunule deep, lenticular, bounded by ridge; anterior adductor muscle scar oval in outline and most deeply impressed posteriorly; two thick cardinal teeth that radiate inward in left valve, one thick cardinal in right valve; posterior tooth elongate and well developed.

Material and occurrence. 4 specimens from Bear Creek (Valanginian, Early Cretaceous); Stanton’s (1895) type material from Cold Fork of Cottonwood Creek (Albian, Early Cretaceous) was also seen ( USNM 23053).

Remarks. Our four specimens from the Bear Creek site reach only 17 mm in length and are thus smaller than Stanton’s (1895) type specimens from CFCC. No additional specimens were found at CFCC during a visit in 2011. The genus Neocrassina  was widely distributed during the Jurassic when it preferred fine to medium grained sands and thus middle shelf settings ( Gardner & Campbell 2002). Most Cretaceous records appear to be restricted to the northern Hemisphere [Siberia ( Saks 1975) and northern Japan ( Hayami 1975)]; although Chavan (1969) reports a range into the Turonian.

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Mollusca

Class

Bivalvia

Order

Veneroida

Family

Astartidae

Genus

Neocrassina

Loc

Neocrassina californica ( Stanton, 1895 )

Kaim, Andrzej, Jenkins, Robert G., Tanabe, Kazushige & Kiel, Steffen 2014
2014
Loc

Astarte californica

Stanton 1895
1895