Description
Author: Jan Delsing
Text ID: 128252
Text Type: 1
Page: 0
Created: 2023-10-16 13:48:16 - User Delsing Jan
Language: EN
Text function: [[t:606339,textblock=128252,elang=EN;Description]]
As Microsetia halia:
Shell small, broadly ovate, light brown. Nuclear whorls not differentiated from the postnuclear turns. Postnuclear whorls well rounded, appressed at the summit, through which the preceding whorl can be seen, which lends the shell the appearance of having a rather broad brown band at the summit; surface of the shell marked by numerous, decidedly retractive, incremental lines and exceedingly fine spiral striations. Sutures moderately impressed; periphery of the last whorl inflated, well rounded; base short, narrowly umbilicated, well rounded. Aperture subcircular; posterior angle obtuse; outer lip thin; inner lip strongly curved and partly reflected over the umbilicus, continuing as a thin callus over the parietal wall.
The type and seven specimens, Cat. No. 187072, U.S.N.M., came from Port Alfred (Coll. No. 610). The type has a little more than five whorls, and measures: Length, 2.1 mm.; diameter, 1.1 mm. Cat-No. 227745, U.S.N.M., contains three specimens from the same locality (Coll. Xo. 840). Another specimen, Cat. No. 250428, U.S.N.M., also comes from Port Alfred (Coll. Xo. 1301).
Bartsch, P., 1915. Report on the Turton Collection of South African marine mollusks, with additional notes on other South African shells contained in the United States National Museum.