Hildoglochiceras kobelli (Oppel, 1863b) morphotype kobelliforme (Bonarelli, 1894) (m)

Figs 6P-T, 8F, G, 9A-C, G, H

Harpoceras kobelli Oppel, 1875 - Waagen: 72, pl. 13, fig. 12a, b (non figs 11, 13 by Bonarelli 1894).

Hecticoceras (Lunuloceras) kobelliforme sp. nov., 1894 - Bonarelli: 95, 96.

Hildoglochiceras kobelliforme (Bonarelli), 1928 - Spath: 159, pl. 13, fig. 17.

Hildoglochiceras kobelli Oppel, 1960 - Collignon: pl. 143, figs 547-550.

Hildoglochiceras sp. aff. kobelliforme (Bonarelli), 2009 - Énay: 84, pl. 1, fig. 6a, b.

Material.

23 specimens, Hildoglochiceras Bed of Jara Dome ( Lower Tithonian); KSKV2019 Jara /1-9, 21, 26, 32, 41, 45, 46, 48-51, 54, 55, 74, 75, KSKV2020 Jara /15 .

Description.

Shell small consting of both phragmocone and body chamber with maximum shell diameter of ca. 50 mm (KSKV2020Jara/15), nearly complete, discoidal, compressed and evolute. Whorl section narrow subtrigonal to oval with narrow venter. Lateral sulcus at lower one-third of lateral height to mid-lateral height, wide, and terminates just above the base of the ventral branch of the peristome. Lateral surface flat, ornamented with faint sickle-shaped (falciform) ribs on the body chamber (e.g., KSKV2019Jara/1). A shallow spiral groove situated at one-third to one-half of the flank height of both phragmocone and body chamber. Spiral groove gradually changing in width with growth. Lower boundary of spiral groove higher than upper boundary (Fig. 6R, S), coinciding with maximum shell thickness. Inner, dorsal one-third of body chamber, i.e. area below the spiral groove, sloping towards umbilical seam with broadly arched umbilical shoulder region and steep umbilical wall. Peristome with lappets preserved. Suture lines well preserved, with denticulated lobes and saddles. Lobes slightly narrower than saddles (Fig. 6Q). First lateral lobe deep, moderately broad, with three short branches at the end. Second lateral lobe much shorter. At least two auxiliary lobes above the umbilical suture. First (external) saddle broad and short, with small secondary lobes. The last two suture lines are very close, almost touching.