339 Neogene paleontology in the northern Dominican Republic 12-13

Neogene paleontology in the northern Dominican Republic: 12-13 - BAP #339

12. The genus Spondylus (Bivalvia: Spondylidae) written by H.E. Vokes and E.H. Vokes

Only three species of Spondylus have been collected in the Neogene strata of the northern Dominican Republic. Theses include: S. bostrychites Guppy, which is largely confined to the more shallow facies of the late Miocene- early Pliocene Gurabo formation; and S. gumanomocon Brown and Pilsbry, which is largely confined to the coralline facies of the Gurabo Formation and the Mao Formation. The third species is represented by a single specimen of S. lucasi Maury from the Gurabo Formation. No specimens are known from the early Miocene Baitoa Formation and only three specimens (one of S. bostrychites and two of S. gumanomocon) have been collected in the late Miocene Cercado formation.

13. The class Echinoidea (Echinodermata) written by P.M. Kier

Nine echinoid species are reported from the Miocene and Pliocene of the Dominican Republic. Four species are still living in the Caribbean and two of the others closely resemble living species. For this reason it is suggested that living conditions in the Miocene and Pliocene were very similar to those now present in the region. One new species is described from the early Pliocene: Clypeaster maoadentroensis.