Calliphylloceras benacense ( Catullo, 1847 )

Cecca, Fabrizio & Savary, Bérengère, 2007, Palaeontological study of Middle Oxfordian- Early Kimmeridgian (Late Jurassic) ammonites from the Rosso Ammonitico of Monte Inici (north-western Sicily, Italy), Geodiversitas 29 (4), pp. 507-548 : 514

Calliphylloceras benacense ( Catullo, 1847) ( Fig. 4A )

Ammonites benacensis Catullo, 1847: 9, pl. 13, fig. 1.

Phylloceras benacense – Neumayr 1871: 336, pl. 15, fig. 3. — Gemmellaro 1878: 165, pl. 1, fig. 1, pl. 3, fig. 1; 1882: 180, pl. 15, figs 1, 2, pl. 17, fig. 1.

Calliphylloceras benacense – Joly 1977: 192, pl. 10, fig. 1, pl. 44, fig. 1, synonymy list. — Cecca 2002: 44, fig. 13.

MATERIAL EXAMINED. — MI4N 8b/2, MI4W 8b/c/2 ( C. cf. benacense ).

STRATIGRAPHIC DISTRIBUTION. — Beds 8b and 8c of section Monte Inici East, which have been assigned to the Late Oxfordian Bimammatum Zone. The species is commonly reported from Oxfordian-Kimmeridgian strata.

DESCRIPTION

Inner mold of an involute shell with elliptical whorl section, rounded flanks and a relatively wide and

strongly convex venter. The last whorl bears five to six furrows, which are shallow and rectiradiate in the upper half of the flank, gently prorsiradiate and deeper in the lower half of the flank. No test remains are preserved. The poor preservation of the suture lines does not allow the observation of their details. Measurements: see Table 1.

DISCUSSION

The studied specimens are rather similar to those identified by Gemmellaro (1878, 1882) with C. benacense .

Figures

FIG. 4. — A, Calliphylloceras benacense (Catullo,1847),specimen MI4N 8b/2 from bed 8b of section Monte Inici East;B, Sowerbyceras tortisulcatum (d’Orbigny,1841),specimen MI4N 6c/1 from bed 6c of section Monte Inici East;C, Holcophylloceras polyolcum (Benecke, 1866), specimen MI4W 8b/c/1 from bed 8c of section Monte Inici East; D, Tornquistes (T.) cf. romani (Douvillé, 1912), specimen MI3 9/7 from bed 9 of section Castello Inici; E, Streblites frotho (Oppel, 1863), specimen MI4N 8b/1 from bed 8b of section Monte Inici East. All figures natural size. Arrows indicate the beginning of the body chamber.