Omniops fasciatus, Perkins, P. D. & Short, A. E. Z., 2004

Perkins, P. D. & Short, A. E. Z., 2004, Omniops gen. n. and two new species of Hydrophilini from Papua New Guinea (Coleoptera: Hydrophilidae), Zootaxa 494, pp. 1-14 : 3-4

Omniops fasciatus sp. n.

Figs. 1–5 , 7–11

Material Examined. Holotype male: “ PNG, W. Highlands,/ 8000’, 30mi. W./ Hagen/ 7­ 12.VII.1974 / S. Peck”. Deposited in the CNC.

Description. Size: Holotype (length/width, mm): Body 2.33/1.34; head 0.48/0.78; pronotum 0.48/1.26; elytra 1.60/1.34. Color: Dorsum of head dark brown except yellow on clypeus in front of eyes, yellow area not attaining level of medial margin of eye; maxillary palpi and antennae light brown to yellow; legs medium brown; pronotum dark brown on disc, yellow laterally, color transition gradual, at about level of medial margin of eye; each elytron with seven dark brown longitudinal bands (including sutural band) on light brown to yellow background, yellow lateral border width about equal to length of eye ( Figs. 1–5 ). Dorsal sculpture: Punctures on head and pronotum very shallow, microreticulate, dull; microreticulation of punctures confluent for some punctures on clypeus basomedially and laterally in front of eye, and on frons at medial margin of eye. Punctures small and microreticulation not confluent in anteromedial triangular area. Punctures on disc of pronotum separated by about puncture diameter; laterally, at about level of medial margin of eye, microreticulation of many punctures becoming confluent, area dull. Scutellum with a few microreticulate punctures, otherwise shining. Elytra serial punctures on disc indistinguishable from surrounding punctation; over posterior one­third serial punctures evident but very indistinct, widely separated within each row and only very slightly larger and deeper than surrounding punctation. Venter: Metasternum with large punctures in transverse row anteromedially, lacking peg­like process ( Fig. 7 ); triangular area between mesocoxae flat, micropunctulate and dull; hydrofuge pubesence longer on disc than laterally, absent from small area basomedially and narrow band basally in front of metacoxae. Fifth ventrite (slide mount) arcuate posteromedially, marginal setae larger than other pubescence on ventrites ( Fig. 11 ). Aedeagus: Length 0.48 mm, width 0.17 mm, paramere length 0.26 mm; parameres rounded apically, extended slightly beyond level of median lobe apex; median lobe rather sharply acute apically, slightly wider in lateral than dorsal view; basal lobe suboval, as wide as greatest width across parameres ( Fig. 10 ).

Etymology. Latin, fasciatus , named in reference to the bands of color on the elytra.

Figures

FIGURE 7. Omniops fasciatus holotype. Pro­, meso­, and metasternum.

FIGURES 8 – 9. Omniops fasciatus holotype. — 8. Dorsum of head. — 9. Divided eye.

FIGURES 10 – 11. Omniops fasciatus holotype. — 10. Aedeagus. — 11. Fifth ventrite.

FIGURES 1 ­ 2. Omniops fasciatus holotype. Dorsal and lateral habitus.

FIGURES 3 – 4. Omniops fasciatus holotype. Oblique and ventral habitus.

FIGURES 5 – 6. Frontal habitus of holotypes. — 5. Omniops fasciatus. — 6. Omniops hanseni.