GORDIOSPIRA Heron-Allen and Earland, 1932

 

 

Type species: Gordiospira fragilis Heron-Allen and Earland, 1932; OD(M).

Gordiospira Heron-Allen and Earland, 1932 (*1479), p. 254.

Test discoidal, proloculus followed by enrolled undivided tubular second chamber, early coiling streptospiral, later planispiral, second chamber not a complete tube, as the lateral walls overlap the preceding whorl that becomes the chamber floor; wall calcareous, imperforate, milky white, porcelaneous, thin, and delicate, surface with transverse growth wrinkles; aperture a broad arch at the open end of the tube. Holocene; S. Atlantic; Arc-tic; Antarctic.