Ocyolinus ganglbaueri Bernhauer, 1906

Chatzimanolis, Stylianos & Ashe, James S., 2009, A revision of the neotropical genus Ocyolinus (Coleoptera: Staphylinidae: Staphylinini), Zootaxa 2162, pp. 1-23 : 14-16

Ocyolinus ganglbaueri Bernhauer, 1906

( Figs. 7 , 13, 16–24, 37–40, 49)

Ocyolinus ganglbaueri Bernhauer, 1906: 199 .

Type material. Holotype: female, with labels: “D. Moritz 1858 Venezuela ” / “ ganglbaueri Brh. Typ. unic.” / “ ganglbaueri Bernh. Typus ” / “ Typus ” ( NMW). Bernhauer (1906) specifically states in the original description that he had available only a single specimen; that specimen is therefore the holotype for the species.

Additional material. VENEZUELA: Aragua, Rancho Grande Biol. Stn., 10°21’N, 67°41’W, 1450 m, 25–28.ii.1995, Robert W. Brooks, #013, ex: flight intercept trap, barcode labels SM0058237, SM0058236, SM0058239 (3 SEMC); same locality and collector, 1–8.iii.1995, #047, barcode label SM0058238 (1 SEMC); same locality and collector, 1–8.iii.1995, 1370 m, #046, barcode labels SM0058234, SM0058240 (2 SEMC); Lara Sanaré, 17.4 km SE Yacambú N.P., 1510 m, 9°42’26”N, 69°34’34”W, 16–18.v.1998, J. Ashe, R. Brooks, R. Hanley, VEN1ABH98 0 62, ex: flight intercept trap, barcode label SM00338031 (1 SEMC); COUNTRY UNKNOWN: South America (1 BMNH).

Diagnosis. Ocyolinus ganglbaueri and O. rugatus 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 ganglbaueri can be easily distinguished from O. rugatus because it lacks the rugose sculpture of the head and pronotum present in O. rugatus ; by the presence of subbasal carina only medially on tergum IV (complete in O. rugatus ); and by the shape of the aedeagus ( Figs. 37–40 ): in O. ganglbaueri the apical hook-like tooth of the medial lobe is smaller than in O. rugatus .

Description. Body length 11.5–13.5 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 transverse, width: length ratio = 1.35. Surface of epicranium shining; with micropunctures and with transverse microsculpture visible at> 70X; with several medium umbilicate setose punctures, distance between puncture 0.5–1 width of puncture; medially without any punctures. Frons area near antennae appearing slightly elevated. Eyes medium, length of eyes / length of head ratio = 0.51, 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 ( Figs. 7 , 16 ) with broad triangular medial tooth, left mandible with slightly convex triangular tooth, right mandible with flat triangular tooth not constricted at tip, distal part of mandible slightly curved. Antennomeres with long macrosetae, antennomeres 1–11 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 0.58 times as long as antennomere 3, antennomeres 6 slightly shorter than antennomere 5, antennomeres 6–10 gradually becoming shorter, antennomere 11 slightly longer than antennomere 10. Neck dorsally with micropunctures and transverse microsculpture, laterally with no punctures.

Pronotum subquadrate, 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 flat; shining with transverse microsculpture and micropunctures. Medium sized punctures throughout the pronotum, irregularly arranged, but distance between punctures typically 1–2 width of puncture. 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 slightly shorter than 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 with tergal basal and subbasal (arch-like) carina; tergum IV with basal and medial only subbasal 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 rounded microsculpture on anterolateral angles. Setae on abdominal terga and sterna appearing strongly iridescent. Sterna III–VII densely punctuated, with polygon-shaped 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. 22 , 37–40 ; 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. 27 , 40 . Median lobe in dorsal view wide, converging to rounded apex, with a pair of dorsal teeth medially and hooklike tooth apically; in lateral view becoming narrower from middle to apex.

Distribution. Known from elevations of 1370–1510 m in Venezuela ( Fig. 49 ).

Habitat. Unknown, collected in flight intercept traps.

Figures

FIGURE 49. Distribution map of Ocyolinus.

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 37 – 40. Aedeagus of O. ganglbaueri. 37. Dorsal view. 38. Lateral view. 39. Detail of median lobe, lateral view. 40. Detail of paramere, ventral view.

FIGURES 16 – 22. Ocyolinus ganglbaueri. 16. Ventral view of left mandible, showing the prostheca, scale bar = 1 mm. 17. Antenna, scale bar = 1.6 mm. 18. Protibia, scale bar = 1 mm. 19. Right maxilla, scale bar = 0.7 mm. 20. Hypopharynx and labial palpi, scale bar = 0.8 mm. 21. Labrum, scale bar = 0.6 mm. 22. Ventral view of paramere showing the sensory spinules (peg setae), scale bar = 0.2 mm.

FIGURES 25 – 28. Aedeagus of O. amethystinus. 25. Dorsal view. 26. Lateral view. 27. Detail of median lobe, lateral view. 28. Detail of paramere, ventral view.