PTYGMATIDIDAE Pchelintsev, 1960

Kollmann, Heinz A., 2014, The extinct Nerineoidea and Acteonelloidea (Heterobranchia, Gastropoda): a palaeobiological approach, Geodiversitas 36 (3), pp. 349-383 : 356

Family PTYGMATIDIDAE Pchelintsev, 1960 ( Fig. 3 A-I)

Ptygmatisidae Pchelintsev, 1960: 51 .

Ptygmatisinae Pchelintsev, 1960: 51.

INCLUDED SUBFAMILIES. — Ptygmatidinae Pchelintsev, 1960 , Umboneinae Lyssenko & Aliev, 1987 and Cryptoplocinae Pchelintsev, 1960 (see Kollmann & Peza 1997 a).

FAMILY CHARACTERS . — Whorls rhombic to triangular in cross section with siphonal notch. Columella hollow to solid. Two columellar plaits extending to detached columellar inductura. Parietal and palatal plait developing inside last whorl, thin and protruding strongly into the whorl interior. External end of plaits inflated, truncated or bifurcate in earlier whorls, incisions between columellar plaits deep and bent.

Figures

FIG. 3. — Ptygmatididae Pchelintsev, 1960: A, Ptygmatis nodosa (Voltz, 1835) (= Pt. ferruginea Cossmann,1898), Oxfordian, Vieil-St.- Remy (Ardennes,France),MNHN.F.B12828; B, Bactroptyxis trachea (Deslongchamps,1841), Bathonian,Rumigny (Ardennes,France), MNHN.F.A49008; C, Cryptoplocus salomoniana Cotteau,1854,Kimmeridgian,Thury (Yonne,France),MNHN.F.R00331; D, E, Ptygmatis carpathica (Zeuschner,1849),Kimmeridgian,La Combe de Vaux (Ain,France),MNHN.F.A49002; F, Bactroptyxis trachea, Late Bathonian, Poix (Ardennes,France),MNHN.F.A49009; G, Pchelintsevia salinensis (d’Orbigny,1850),Portlandian,Doubs (France);NHMW 1874-LI- 864;H, Ptygmatis pseudobruntrutana (Gemmelaro,1865),axial section,recrystallized shell partly preserved,Kimmeridgian,Ernstbrunn