Ocyolinus rugatus Sharp, 1884

Chatzimanolis, Stylianos & Ashe, James S., 2009, A revision of the neotropical genus Ocyolinus (Coleoptera: Staphylinidae: Staphylinini), Zootaxa 2162, pp. 1-23 : 18-21

Ocyolinus rugatus Sharp, 1884

( Figs. 2 , 9 , 15, 45–48, 49)

Ocyolinus rugatus Sharp, 1884: 363 .

Ocyolinus vulneratus Bernhauer, 1906: 199 , new synonymy.

Type material. Lectotype of O. rugatus , here designated: female, on card with D. Sharp’s handwriting “ Ocyolinus rugatus . Type D. S. Venezuela. (Higgins)”, and with labels as follows: “ Type ” / “ Venezuela ” / “Sharp Coll. 1905 – 313.” / “ Venezuela ” / “ Lectotype Ocyolinus rugatus Sharp des. Chatzimanolis 2009” ( BMNH). Paralectotype: female with labels: “ Venezuela ” / “Sharp Coll. 1905 – 313.” / “ Ocyolinus rugatus Shp. BM drawer 681” / “ Paralectotype Ocyolinus rugatus Sharp des. Chatzimanolis 2009” ( BMNH).

Lectotype of O. vulneratus , here designated: female with labels: “ Venezuela, Schmidt 1858” / “ vulneratus Brh., Typ. ” / “ vulneratus Bernhauer Typus ” / “Chicago NHMus M. Bernhauer Collection” / “ Lectotype Ocyolinus vulneratus Bernhauer des. Chatzimanolis 2009” ( FMNH). Paralectotype: female with labels: “D. Moritz 1858 Venezuela ” / “co-Typus” / “ vulneratus Brh. Det. Bernhauer ” / “ Paralectotype Ocyolinus vulneratus Bernhauer des. Chatzimanolis 2009” ( NMW).

Additional material. C OLOMBIA: 6185 / Columb. Mont. (1 ZMHB). VENEZUELA: Aragua, Rancho Grande Biol. Stn., 10°21’N, 67°41’W, 1450 m, 1–8.iii.1995, Robert W. Brooks, #047, ex: flight intercept trap, barcode labels SM0058232 (1 SEMC); same locality, date and collector, 1370 m, #046, barcode labels SM0058230, SM0058231, SM0058233, SM0058235 (4 SEMC); same locality, 1300 m, 12–14.v.1998, J. Ashe, R. Brooks, R. Hanley, VEN1ABH098 0 27, ex: flight intercept trap, barcode label SM0123206 (1 SEMC); same locality, Portachuelo Pass, 1100 m, 14.v.1998, J. Ashe, R. Brooks, R. Hanley, VEN1ABH98 0 41, barcode label SM0121667 (1 SEMC); Aragua, Rancho Grande Biol. Stn., Pico Periquitos, 1250 m, 10°21’32”N, 67°41’46”W, 12–14.v.1998, J. Ashe, R. Brooks, R. Hanley, VEN1ABH98 0 30, ex: flight intercept trap, barcode label SM0123328 (1 SEMC); Aragua, Rancho Grande Biol. Stn., 1550 m, 10°21’38”N, 67°41’38”W, 12–14.v.1998, J. Ashe, R. Brooks, R. Hanley, VEN1ABH98 0 29, ex: flight intercept trap, barcode label SM0123246 (1 SEMC); D. Moritz 1858 / rugatus det. Bernhauer (1 NMW, 1 FMNH); c. Epplsh. Steinc. d. / Ocyolinus rugatus Shr. Venezuela (1 NMW); Mérida / Venezuela / Ocyolinus rugatus / ex. coll. Scheerpeltz (1 NMW); “Veneza. 55.89” (1 BMNH).

Diagnosis. Ocyolinus rugatus and O. ganglbaueri can be distinguished from all other known species of Ocyolinus by the dark brown metallic coloration of the head and pronotum (dark metallic purple in other species), the presence of a subbasal carina on tergum III, and the transverse microsculpture on the head and pronotum (rounded in other species). Ocyolinus rugatus can be easily distinguished from O. ganglbaueri because it has rugose sculpture of the head and pronotum that is absent in O. ganglbaueri ; by the presence of a complete subbasal carina on tergum IV (only medially in O. ganglbaueri ); and by the shape of the aedeagus ( Figs. 45–48 ): in O. rugatus the apical hook-like tooth of the medial lobe is larger than in O. ganglbaueri .

Description. Body length 10.5–15.5 mm.

Coloration. Head and pronotum shining metallic brown with green overtones. Ventral surface of head and pronotum dark brown. Antennomeres dark orange. Mesoscutellum dark brown. Elytra dark metallic brown with blue overtones. Abdomen brown to dark brown. Legs brown, except tarsi dark orange.

Head slightly transverse, width: length ratio = 1.28. Surface of epicranium shining, rugose, with micropunctures and with transverse microsculpture visible at> 70X; with medium sized umbilicate setose punctures covering the epicranium, distance between puncture varies. Frons area near antennae appearing slightly elevated. Eyes medium, length of eyes / length of head = 0.44, distance between eyes as wide as twice length of eye. Postgena with medium, shallow punctures (about 1–2 punctures / 0.5 mm), punctures not uniformly distributed. Mandibles ( Fig. 9 ) with broad triangular medial tooth, left mandible with slightly convex triangular tooth, right mandible with convex triangular tooth slightly constricted at tip, distal part of mandible strongly curved. Antennomeres with long macrosetae, antennomeres 1–11 longer than wide, but antennomere 10 only slightly longer than wide, antennomere 1 slightly curved, about 2.5 times as long as antennomere 2, antennomere 3 1.5 times as long as antennomere 2, antennomere 4 0.63 times as long as antennomere 3, antennomeres 6 slightly shorter than antennomere 5, antennomeres 6–10 gradually becoming shorter, antennomere 11 longer than antennomere 10. Neck dorsally with micropunctures and transverse microsculpture, laterally with no punctures.

Pronotum quadrate, width: length ratio = 0.98; antero-lateral angles obtusely rounded, curved downwards. Lateral margins of pronotum almost parallel-sided in dorsal aspect, pronotum broadest in apical 1/3 and narrower at basal angles. Surface of pronotum rugose, with elevated ridges; shining with transverse microsculpture and micropunctures. Medium sized punctures throughout the pronotum, irregularly arranged. Large setose punctures present around the margin of pronotum. Pronotum with long yellow macrosetae along borders. Mesoscutellum prominent with transverse microsculpture throughout and punctures medially.

Elytra subequal to pronotum, with large setose uniform punctures (about 7 punctures / 0.5 mm), punctures confluent; with long yellow macrosetae along borders of elytra. Elytra appearing glossy, without microsculpture but with tiny micropunctures between larger punctures visible only at> 70X.

Legs: Protarsus enlarged, with yellow setae; meso- and metatarsi not enlarged. Legs almost completely covered with long yellow and brown setae.

Abdominal tergum III–IV with tergal basal and subbasal (arch-like) carina; terga V–VII with basal and no subbasal carina. Terga III–VII with uniform punctation patterns, densely covered with punctures and yellowish brown setae, with polygon-shaped microsculpture on antero-lateral angles. Setae on abdominal terga and sterna appearing strongly iridescent. Sterna III–VII densely punctuated, with rounded microsculpture anteriorly, except VIII throughout. Lateral tergal sclerites of the abdominal segment IX long and straight, covered with long brown macrosetae.

Secondary sexual structures. Male: distal margin of sternum VII with slight broad emargination medially; sternum VIII with deep V-shaped emargination medially; sternum IX with deep V-shaped emargination medially. Female without obvious sexual structures.

Aedeagus as in Figs. 45–48 ; paramere in dorsal view converging to rounded apex, shorter than median lobe; in lateral view paramere slightly concave, straight; with sensory spinules as shown in Figs. 48 . Median lobe in dorsal view wide, converging to rounded apex, with a pair of small dorsal teeth medially and hook-like tooth apically; in lateral view becoming narrower from middle to apex.

Distribution. Known from elevations of 1100–1550 m in Colombia and Venezuela ( Fig. 49 ).

Habitat. Unknown, collected in flight intercept traps.

Synonymy. The series of type specimens for O. rugatus and O. vulneratus are similar in almost all respects. Bernhauer probably described the specimens he had as O. vulneratus because they are somewhat smaller in size than O. rugatus , and there is some variation in the density of the punctation on the head between the type specimens. Bernhauer was aware of O. rugatus , but it is not clear if he had seen the type series of O. rugatus . However, after examining the type series and several other specimens, the first author concluded that the two previously described species refer to a single species.

Figures

FIGURE 49. Distribution map of Ocyolinus.

FIGURES 1 – 3. Habitus photographs of Ocyolinus. 1. O. amethystinus, holotype. 2. O. rugatus, lectotype. 3. O. nebulosus, paratype.

FIGURES 4 – 9. Head of Ocyolinus. 4. O. amethystinus. 5. O. astenos. 6. O. dimoui. 7. O. ganglbaueri. 8. O. nebulosus. 9. O. rugatus.

FIGURES 45 – 48. Aedeagus of O. rugatus. 45. Dorsal view. 46. Lateral view. 47. Detail of median lobe, lateral view. 48. Detail of paramere, ventral view.