NMITA: Neogene Marine Biota of Tropical America

Bifurcium canae (Jung, 1986)

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Photograph: (Jung, 1989, Fig. 332.1) Scale bar is 1 mm. Image of NMB H17042. Paratype. NMB locality 16837: Río Cana, Dominican Republic; Cercado fm. Height: 7.8 mm; width: 3.9 mm.

Synonyms: Strombina (Bifurcium) canae Jung, 1986, p. 23, pl. 13, figs. 10, 11, pl. 14, figs. 1-9, text-figs. 19-21.

Morphologic Description: Of small size, stout. Protoconch consists of 1 3/4 volutions. Outer lip of protoconch slightly sigmoid. Teleoconch whorls up to 5 1/2. Spire whorls straight in profile, sculptured by orthocline axial ribs. Axial sculpture on last spire whorl may be faint. There are 13 to 16 axial ribs per whorl. Outer lip strongly thickened, extended adapically, usually with prominent denticles on its inner surface. Body whorl moderately inflated, with a varying number of spiral cords near its constricted base, and with 3 conspicuous axial swellings on its left side. Columellar a ridge forming the left margin of the posterior canal. Anterior canal moderately long, recurved.

Holotype: NMB H 17041 (NMB 16837: Río Cana, Dominican Republic, upper part of Cercado Formation, late Miocene).

Distribution: Late Miocene: upper part of Cercado Formation of the Río Cana section, northern Dominican Republic; the Gurabo Formation of the Río Gurabo section, northern Dominican Republic.

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