LUCINIDAE FLEMING, 1828

Charles L. Powell, Ii, Clites, Erica C. & Poust, Ashley W., 2022, Miocene marine macropaleontology of the fourth bore Caldecott Tunnel excavation, Berkeley Hills, Oakland, California, USA, PaleoBios 36, pp. 1-34 : 9

LUCINIDAE FLEMING, 1828

We identify specimens attributable to two lucinid taxa in the Tsm Caldecott Tunnel fauna. The first, represented by specimen, UCMP 218741, has a diamond shape outline and sculpture most similar to Lucinoma but may represent a new genus ( Fig. 13 ) with a well-defined posterior sulcus instead of weak to sometimes nearly absent sulcus as in L. acutilineata , L. annulata , and L. hannibali ( Clark, 1925) . The second lucinid-type specimens may also represent another new genus that is similar in outline to the genus Tehamatea ( Myrteinae Chavan, 1969 ) ( Fig. 14 ) but sculptured like the previous undetermined taxon with fine co-marginal lirae.

Figures

Figure 13. Indeterminate Propeamussiidae from the Tsm Caldecott Tunnel fauna, possibly right valve. Hypotype from UCMP locality IP13004, UCMP 412704.

Figure 14.aff. Lucinoma? n. sp. from the Tsm Caldecott Tunnel fauna, left valve. Hypotype from UCMP locality IP13005, UCMP 218741.