MYRTEINAE CHAVAN, 1969

Charles L. Powell, Ii, Clites, Erica C. & Poust, Ashley W., 2019, Miocene marine macropaleontology of the fourth bore Caldecott Tunnel excavation, Berkeley Hills, Oakland, California, USA, PaleoBios 36, pp. 1-34 : 10

MYRTEINAE CHAVAN, 1969 (?)

FIG. 15

The second lucinid in the Tsm Caldecott Tunnel fauna is similar to the previous one in having widely-spaced co-marginal lamellae, but differs in its low, broad umbo, wide, oval shape, and weak anterior dorsal sulcus. This lucinid is very similar in shape to genus Tehamatea recently described by Kiel (2013). However, Tehamatea has a more prominent umbo and co-marginal lamellae only on its early shell after which the sculpture becomes irregular co-marginal growth lines. Also Tehamatea is only known from the Late Jurassic to Early Cretaceous of central California (Kiel 2013). Interestingly, Tehamatea is also found in ancient methane seeps. We assign this species to aff. Tehamatea until additional specimens can be found and studied in depth.

Figures

Figure 15. aff. Tehamatea n. sp., from the Tsm Caldecott Tunnel fauna, right valve. Hypotype from UCMP locality IP13001, UCMP 410562.