صفحه اصلى به روز رسانى در :  شنبه 1 خرداد 1395
ديگر گونه ها
راستهFORAMINIFERIDA
زير راستهTEXTULARIINA
رو خانوادهSPIROPLECTAMMINACEA
خانوادهSPIROPLECTAMMINIDAE
زير خانوادهVULVULININAE
جنس AMMOSPIRATA


AMMOSPIRATA Cushman, 1933

 

Type species: Pavonina mexicana Cushman, 1926 (*733), p. 22; OD.

Ammospirata Cushman, 1933 (*769), p. 32.

Test free, palmate, compressed; globular proloculus followed by small planispiral coil of a few narrow elongate chambers in a single whorl, then a short biserial stage of a few pair of very broad low chambers that curve back at the periphery to nearly surround the early whorl, adult test with well-developed series of as many as fourteen broad, low, and strongly arched uniserial chambers, sutures thickened and elevated; wall finely agglutinated, smoothly finished; aperture terminal, multiple in the adult, consisting of a row of small pores in an elongate narrow depression on the upper margin of the final chamber. U. Eocene?; Oligocene; Mexico; USA: Texas, Florida.

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