Cryptaulax cf. damboreneae, Ferrari, 2009

Ferrari, S. Mariel, 2009, Cosmopolitan Early Jurassic marine gastropods from west-central Patagonia, Argentina, Acta Palaeontologica Polonica 54 (3), pp. 449-461 : 454-457

publication ID

https://doi.org/ 10.4202/app.2008.0070

persistent identifier

https://treatment.plazi.org/id/03B7967C-5C50-AA2F-655F-F8FB86AD160C

treatment provided by

Felipe

scientific name

Cryptaulax cf. damboreneae
status

sp. nov.

Cryptaulax cf. damboreneae sp. nov.

Fig. 3E View Fig .

Material.—MLP 18742, MLP 18743, MLP 18744; poorly preserved teleoconch fragments from Cerro Puchenque locality (Mendoza) ( Fig. 1 View Fig ), Neuquén Basin, Argentina. Dactylioceras hoelderi Zone , Lower Toarcian, Lower Jurassic.

Description.—Small−sized and high−spired shell, slender and turriculate. Protoconch is not preserved. Teleoconch comprises five whorls with a straight outline. Sutures are deeply incised. Ornament consists of spiral and axial ribs with conspicuous nodes at intersections. Axial ribs are predominant and consists of orthocline to slightly prosocline axial ribs running from suture to suture. Axial ribs are regularly spaced and show no marked change during ontogeny. Seven distinct regularly spaced spiral ribs appear on mature teleoconch whorls (fewer in juvenile growth stages). A second order of spiral ribs is not developed. Basal and apertural features are not preserved.

Remarks.—The present material strongly resembles Cryptaulax damboreneae sp. nov. However, Cryptaulax cf. damboreneae sp. nov. has larger shells, orthocline to slightly opistocline axial ribs, seven stronger spiral ribs intersecting the axial elements, and a weakly developed second order of spiral ribs. The present material probably represents a new Cryptaulax species but the specimens are too poorly preserved for such proposal.

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