| Measurements | D mm | H/D | T/D | O/D | H/T |
|---|---|---|---|---|---|
| CP-328 | 34.3 | 0.39 | 0.46 | 0.39 | 0.84 |
| Spath 1933 pl.41 fig.2 | 37 | 0.33 | 0.33 | 0.45 | 0.82 |
| Age | Origin |
|---|---|
|
Base of Pénzeskút marls Condensed Upper Albian rostratum to perinflatum zones |
Tilos forest Village of Pénzesgyõr Bakony Hills, Hungary |
Description. A small, evolute ammonite with whorls 20% covered and widening with growth, belonging to an assemblage on a limestone block from Pénzesgyör. Rectangular section, slightly depressed, bearing a continuous, smooth ventral keel with a triangular section. Umbilicus broad, sloping at 80°. The coarse, radial, and closely spaced ribs originate at the umbilical suture and bear three tubercles shaped like small, protruding pimples: one umbilical, where some ribs bifurcate, one at mid-flank, and one ventrolateral. These ribs are straight on the profile view but project forward on venter, forming rounded terminations that do not quite reach the carina. There are a total of 26 ribs on venter. Some portions of suture visible under magnification show the L1 typical of Cantabrigites: shorter than the ventral lobe, with a rectangular trunk ending in three teeth and with an additional tooth on the ventral side.
Remarks. In Cantabrigites minor the median tubercles are not always present. The robusta variety has stronger, distinctly trituberculate ribs. Based on the shape of its ribs on the flanks and venter, CP-328 closely resembles the robusta of pl. 41, fig. 2 of Spath (1933), except that it is thicker. C. minor is known from condensed levels, and its vertical range is uncertain. Jattiot et al. (2021) mention it at Salazac (Gard) in an association of the Mortoniceras fallax zone. In Hungary, where our specimen comes from, it is found in a condensation of the M. rostratum and M. perinflatum zones (Szives et al., 2017).