Genus Lituola Lamarck
Type species – Litulites nautiloidea Lamarck, 1816.
Lituola senoniensis (Hofker, 1949)
Pl. 1, fig. 10.
Description – Test planispiral with somewhat protruding chamber walls. Three to four tight, involute whorls, leaving a broad umbillicus. Chambers numerous, up to 24 in the last whorl, long and narrow. No canal system, agglutinated walls thick, microgranular. Diameter 0.3-0.8 mm, thickness 0.10-0.22 mm.
Stratigraphy – First appears in the Nekum Member and is more abundant in the Meersen Member. This species has also been found in Paleocene sedimentary rocks, but this occurrence probably represents reworked specimens.
Remarks – When first described, this species was placed in the genus Peneroplis because of the very similar internal and external morphology. In the original description, Hofker (1949) even considered that his new species was synonymous with an extant species, Peneroplis pertusus (Forskål). Only when better-preserved specimens became available did the micro-granular texture of the (agglutinated) test walls become clear.