CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia marksi Martin 1943
This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.
Original Description "Test rotaliform, strongly convex ventrally, flat tolightly convex dorsally; wall calcareous, perforate, completely covered with fine protuberances, giving a granular appearance; periphery subacute, not keeled, lobulate along two or three chambers; complete whorl visible dorsally, early chambers somewhat indistinct; only last whorl of five or six chambers visible ventrally; chambers inflated, increasing gradually in size as added; dorsal sutures slightly curved, almost tangential, usually indistinct, slightly if at all depressed; ventrall sutures depressed, distinct, straight; umbilicus on ventral side open; aperture an indistinct slit in plane of ventral sutures at base of last-formed chamber, extending up to the umbilicus, commonly filled with extraneous material. Size: Maximum diameter 0.44 mm.; minimum diameter 0.39 mm.; thickness 0.3 mm. Etymology: Named in honor of Jay Glenn Marks. Extra details from original publication Remarks.-This species is similar to Globorotalia crassata var. densa (Cushman) of Cushman & Barksdale (1930) but differs in being typically larger, more compact, more strongly convex ventrally, less distinctly papillate, and with the chambers less distinctly lobulate.
Range.-Samples I-S2 through I-Sll-54.
References:
Martin, L. T. (1943). Eocene foraminifera from the type Lodo Formation, Fresno County, California. Stanford University Publications, Geological Sciences. 3(3): 1-35. gs
Globorotalia marksi compiled by the pforams@mikrotax project teamviewed: 16-10-2024
holotype illus_863.jpg
holotype illus_863.jpg
