- Biplex cretaceous Abdel-Gawad, 1986
might belong to Spinigeropsis
Original Description of Biplex cretaceus by Abdel-Gawad, 1986, p. 115:
- Diagnosis: A Biplex of high spire, with two laterally expanded spinose varices; last whorl bicarinate with a relatively long siphonal canal.
- Description: The shell is large, fusiform, with a high spire. The spire contains about five carinate whorls, with expanded spinose varices on both sides. The suture is impressed. The kast whorl is bicarinate, and relatively inflated with a faint spiral cord developed on its basal part and forming the faint lower carination. The shell is ornamented with obscure nodular axial costae crossed by numerous spiral lines. The siphonal canal is moderately elongated. The aperture is unknown.
- remarks: The new species displays an elongated spire with laterally expanded varices and nodular axial costae. These features agree with those of the genus Biplex Perry, particularly of the Recent species Biplex perca Perry and Biplex aculeatus (Schepman) from the Indo-Pacific (see Habe 1968). The genus Biplex has not yet been reported in the Cretaceous strata; it is known from the Miocene of Japan to the Recent Indo-Pacific, as mentioned by Wenz (1941, p. 1061).
- Holotype: The specimen presented in Pl. 15, Fig. 1.
- Type Locality: Nasilow.
- Type Horizon: Topmost part of the Belemnella kazimiroviensis Zone (hardground).
- Derivation of the Name: Latin cretaceus - referring to the first occurence of this genus in the Cretaceous strata.
Beplix[sic] cretaceus Abdel-Gawad, 1986, pl. 15, fig. 1
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