Operclipygus carinistrius (Lewis, 1908) Lewis, 1908

Caterino, Michael S. & Tishechkin, Alexey K., 2013, A systematic revision of Operclipygus Marseul (Coleoptera, Histeridae, Exosternini), ZooKeys 271, pp. 1-401 : 44-45

Operclipygus carinistrius (Lewis, 1908) comb. n. Fig. 8CMap 2

Phelister carinistrius Lewis, 1908: 159.

Type locality.

Not specified beyond Bahia State, Brazil.

Type material.

Lectotype female, here designated: "Bahia, A.G." [ Lewis’ description says only Brazil] / “Type” / " Phelister carinistrius Lewis Type" / "G. Lewis Coll. B.M.1926-369" / "LECTOTYPE Phelister carinistrius Lewis, 1908 M.S. Caterino & A.K.Tishechkin des. 2010" (BMNH); Paralectotype female: same data as lectotype (BMNH). This species was described from an unspecified number of specimens, and the lectotype designation fixes primary type status on one of two known syntypes.

Diagnosis.

Operclipygus carinistrius is very similar to Operclipygus mutuca ,differing only in the following characters: anterior submarginal pronotal stria recurved more distinctly straight posterad; prosternal keel very weakly emarginate at base, with carinal striae complete, united in narrow anterior arch; outer subhumeral stria complete, inner subhumeral stria present in apical two-thirds, dorsal striae 1-5 and sutural complete; 5th and sutural striae connected by a basal arch; elytral disk with scattered punctures near apex; propygidial punctures small, separated by about their diameters; pygidium smooth, apical marginal sulcus well developed, especially at sides as series of close, subcontiguous punctures. Male not known.

Remarks.

Operclipygus carinistrius is only known from its type specimens, both females. But based on numerous characters it can be placed in the Operclipygus mirabilis group, very close to the preceding species, Operclipygus mutuca . They differ primarily in the presence in Operclipygus carinistrius of a distinct pygicial sulcus, which is absent or at most very faint in Operclipygus mutuca .