Stroborineceras felis, Korn & Bockwinkel, 2022

Korn, Dieter & Bockwinkel, Jürgen, 2022, Early Carboniferous nautiloids from the Central Sahara, southern Algeria, European Journal of Taxonomy 831, pp. 67-108 : 78-79

Stroborineceras felis gen. et sp. nov.

urn:lsid:zoobank.org:act:406664D9-FD31-430B-8988-AD7510B6B36A

Fig. 8 , Table 3

Diagnosis

Species of Stroborineceras gen. nov. with weakly depressed, rounded-pentagonal whorl profile (ww/wh ~1.20), venter concave, ventrolateral shoulder angular. Whorls not embracing. Ornament with five faint spiral ridges located on the flank.

Etymology

From the Latin ‘ felis ’, meaning ‘cat’ and referring to the characteristic whorl profile resembling a cat’s head.

Type material

Holotype ALGERIA • Mouydir , south of Oued Temertasset (locality MOU-D1); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 8A ; MB.C.30454 .

Description

Holotype MB.C.30454 is a phragmocone fragment of slightly less than 90 degrees in length ( Fig. 8A ). It reaches a whorl height of 13 mm and the profile is weakly depressed (ww/wh = 1.22). The characteristic whorl profile has the outline of a cat’s head shape ( Fig. 8B ); its general shape is rounded-pentagonal. The venter is concavely incurved and is bordered by the very prominent, angular ventrolateral shoulder. The profile is widest at the middle of the whorl height; from here the flanks converge with a slight concave incurvation. The dorsum is broadly rounded. On the flank about five spiral lines are visible; they become weaker towards the dorsum. The suture line shows a deep, almost semicircular external lobe, a subacute ventrolateral saddle, a shallow, very broadly rounded lateral lobe and a very broad, low internal saddle ( Fig. 8C ).

Remarks

Stroborineceras felis gen. et sp. nov. differs from S. insalahensis gen. et sp. nov. by the less depressed whorl profile (ww/wh ~ 1.25 in S. felis gen. et sp. nov. but ~ 1.55 in S. insalahensis gen. et sp. nov.), by the concave venter (flattened or weakly convex in S. felis gen. et sp. nov.) and by the considerably weaker spiral lines (coarse and sharp in S. insalahensis gen. et sp. nov.).

Figures

Fig. 8. Stroborineceras felis gen. et sp. nov., holotype MB.C.30454 (Korn et al. 2002 Coll.) from Oued Temertasset. A. Ventral and lateral views. B. Whorl profile. C. Suture line, at ww =15.6 mm, wh=12.7 mm. Scale bar units =1 mm.

Tables

Table 3. Conch dimensions (in mm) and ratios of Stroborineceras felis gen. et sp. nov.

Specimen	dm	ww	wh	uw	ah	ww/dm	ww/wh	uw/dm	WER	IZW
MB.C.30454	–	16.0	13.1	–	–	–	1.22	–	–	–