Discoderus cyaneopacus (Darlington)

Shpeley, Danny, Hunting, Wesley & Ball, George E., 2017, A taxonomic review of the Selenophori group (Coleoptera, Carabidae, Harpalini) in the West Indies, with descriptions of new species and notes about classification and biogeography, ZooKeys 690, pp. 1-195 : 89-92

Discoderus cyaneopacus (Darlington) Figs 66C, 68 A–C, 69C, 71

Selenophorus cyaneopacus Darlington, 1934: 107. HOLOTYPE male: Cap Haitien, W.M. Mann (MCZC). One male, two female PARATYPES: Jean Rabel, E.C. & G.M. Leonard (USNM). One female PARATYPE: Port-au-Prince, Aug., G.N. Wolcott (USNM).- Blackwelder 1944: 49.- Erwin and Sims 1984: 440.- Lorenz 1998: 355.- Lorenz 2005: 377.- Perez-Gelabert 2008: 79.

Discoderus cyaneopacus ; Ball 1992: 85.

Type locality.

Cap Haitien, Nord Department, Haiti, Hispaniola.

Diagnosis.

The larger size, violaceous to bluish metallic luster of the dorsum and piceous legs readily separates the members of this species from those of the three other Discoderus species.

Descriptive notes.

Data for SBL in Table 1. Habitus as in Fig. 66C. Clypeus with anterior margin markedly concave, basal membrane of labrum visible in most specimens. Anterior margin of labrum with markedly deep V-shaped notch. Antennae and mouthparts rufo-testaceous to dark rufous. Ventral surface and legs piceous. Pronotum and elytra violaceous to bluish, with hints of green; head with less metallic reflection. Head, posterio lateral surface of pronotum and elytra with mesh pattern isodiametric; pronotal disc with mesh pattern slightly transverse, sculpticells about 2 × wide as long. Elytral striae impunctate, except the standard setigerous punctures in striae 2, 5 and 7. Males with two terminal setae and females with four terminal setae near the posterior margin on sternum VII.

Male genitalia. Fig. 68 A–C. Apical portion of phallic median lobe moderately long, narrowly triangular, symmetrically rounded in ventral/dorsal aspects; endophallus without spines or darkened microtrichial fields; without lamina.

Ovipositor and female reproductive tract. Fig. 69C. Very similar to that of D. beauvoisii . For details, see this topic for D. beauvoisii , above.

Geographical distribution.

Fig. 71. This species is only known from the Greater Antillean island of Hispaniola.

Chorological affinities and relationships.

The range of this species is overlapped by the ranges of D. beauvoisii and D. thoracicus . The bright metallic luster of the dorsal surface of the body shared by members of D. cyaneopacus and D. beauvoisii may indicate close relationship between these two species.

Material examined.

In addition to type material, we have seen a total of 14 specimens (3 males, 11 females). See Appendix for details.