CHALAROSCHWAGERINA Skinner and Wilde, 1965

 

 

Type species: Chalaroschwagerina inflata Skinner and Wilde, 1965; OD.

Chalaroschwagerina Skinner and Wilde, 1965 (*2997), p. 72.

Test small to large, up to 11 mm in length, fusiform to subspherical, poles rounded to bluntly pointed, large proloculus followed by four to eight whorls, with first one and a half to two volutions tightly coiled, later whorls expand rapidly although the change is not abrupt, final one or two whorls again of reduced height, septa strongly fluted in the lower part but only slightly wavy in the upper part, opposed folds of adjacent septa commonly meeting to divide the lower part of the chamber into small chamberlets but do not form cuniculi, phrenothecae present; wall thick, of tectum and coarsely alveolar keriotheca, tunnel commonly low and narrow, weak chomata on the proloculus and may be pres­ent on the first whorl but absent from later whorls, axial filling formed by secondary depos­its on the septa. L. Permian (Sakmarian), Wolfcampian; USA: California, Nevada, Oregon; S. Chile: Isla Tarlton.