A monograph of the Australopacific Saprininae (Coleoptera, Histeridae) Author Lackner, Tomas Author Leschen, Richard A. B. text ZooKeys 2017 689 1 263 http://dx.doi.org/10.3897/zookeys.689.12021 journal article http://dx.doi.org/10.3897/zookeys.689.12021 1313-2970-689-1 2F40BF4AD35F4CC697D5976EC201E652 2F40BF4AD35F4CC697D5976EC201E652 Saprinus (Saprinus) pacificus sp. n. Figs 494, 495-503, 504-509, 751 Type locality. Kiribati: Bikinibeu. Figure 494. Saprinus (Saprinus) pacificus sp. n. habitus, dorsal view. Type material examined. Holotype, ♂, side-mounted on a triangular card, with propygidium and pygidium detached, glued to the same triangular card as specimen, terminalia also glued to the same triangular card as specimen, with the following labels: "KIRIBATI / Bikenibeu / N. 1977 / P.J. Simmonds" (written); followed by: "Assoc. with / poultry / dung" (written); followed by: "SAPRINUS / sp. 2 / Det. T. Lackner 2009" (printed-written); followed by: " Saprinus / nitiduloides / Det. S. Mazur" (printed-written); followed by: "09-078" (yellow label, pencil-written); followed by: " Saprinus (Saprinus) / pacificus sp. n. / HOLOTYPE / Lackner&Leschen 2010" (red label, printed) (NZAC). Paratypes, 1 ♂ & 4 specs., with the following labels: "KIRIBATI / Bikenibeu / N. 1977 / P.J. Simmonds" (written); followed by: "Assoc. with / poultry / dung" (written); followed by: " Saprinus (Saprinus) / pacificus sp. n./ PARATYPE / Lackner&Leschen 2010" (red label, printed) (NZAC; 1 PT in coll. TLAN). Distribution. Kiribati atoll (Fig. 751). Biology. Collected in association with poultry dung. Remarks. Because the following newly described species, S. pacificus sp. n., is in its general appearance rather similar to the preceding species S. nitiduloides we provide it with only diagnostic description. The figures, as well as male genitalia drawings are kept, for the sake of easier identification of the Australopacific taxa. Diagnostic description. This species is in its general outlook rather similar to S. nitiduloides (compare Figs 477 and 494); body length: PEL: 3.25-4.00 mm; EL: 2.00-2.35 mm; APW: 1.15-1.40 mm; PPW: 2.40-3.00 mm; EW: 2.75-3.25 mm. Antennae (Fig. 495-496) similar to other congeners, e.g. S. cyaneus (Fig. 409) or S. nitiduloides (Fig. 478). Mouthparts similar to congeners; mentum (Fig. 497) with deep median notch on anterior margin, surface around it with two long setae and several much shorter setae, lateral margins with two rows of short ramose setae, disc of mentum finely imbricate, with sparse short setae. Clypeus and frons (Fig. 495) similar to those of S. nitiduloides (compare Fig. 478 with Fig. 495); frontal stria prolonged onto clypeus and also almost complete along anterior frontal margin (occasionally intermittent). Pronotal sides moderately narrowing anteriorly, pronotal depressions deeper and apical angles more prominent than with S. nitiduloides (compare Figs 477 and 494). Elytral structure and configuration of elytral striae similar to those of S. nitiduloides , but punctation even sparser, punctures separated by several times their diameter (compare Figs 477 and 494). Propygidium and pygidium very similar between the two species (compare Figs 479 and 498). Prosternum structurally similar to that of S. nitiduloides , but the course of carinal prosternal striae differ between the two species: while sub-parallel and slightly narrowing before apex in S. nitiduloides (Fig. 480) they are slightly widening anteriorly with S. pacificus (Fig. 499). Mesoventrites similar between the two species, but that of S. pacificus slightly wider than that of S. nitiduloides and its punctation finer; furthermore the lateral mesoventral stria almost complete with S. pacificus while shortened apically with S. nitiduloides (compare Figs 481 and 500). Metaventrites and metepisternal similar between the two species (compare Figs 482 and 501). Protibia (Fig. 502) similar to that of S. nitiduloides (Figs 483-484); mesotibia (Fig. 503) and metatibia similar to other congeners (e.g. S. artensis ). Male genitalia. Eighth sternite (Figs 504-505) with pseudo-pores, weakly separated on apical third, otherwise fused, apex with velum adorned with dense rows of brush-like setae; laterally apex of eighth sternite with a single row of microscopic sparse setae; eighth tergite and eighth sternite fused laterally (Fig. 506). Ninth tergite (Figs 507-508) typical for the subfamily; anterior margin of tenth tergite straight, apical angles strongly sclerotized, bent; spiculum gastrale (Fig. 507) abruptly dilated on apical third; apical end strongly sclerotized, with protruding horn-like structures and tiny median notch; basal end only slightly dilated, outwardly arcuate. Aedeagus (Figs 509-510) parallel-sided, with parameres fused along their basal half (roughly); basal piece of aedeagus short, ratio of its length: length of parameres 1: 4; aedeagus slightly curved from lateral view (Fig. 510). Male terminalia of S. pacificus sp. n. are similar to those of S. artensis , S. cyaneus cyaneus , and S. nitiduloides especially regarding strongly sclerotized apices of tenth tergite. Although the structure of spiculum gastrale or ninth tergite is also similar between the four species, they differ in the structure of eighth tergite. Their aedeagi, on the other hand, are strikingly similar indicating their recent common ancestry (compare Figs 330-336; 415-412; 487-493; 504-510). Figures 495-503. 495 Saprinus (Saprinus) pacificus sp. n. head, dorsal view 496 antennal club, dorsal view 497 mentum, ventral view 498 propygidium + pygidium 499 prosternum 500 mesoventrite 501 lateral disc of metaventrite + metepisternum 502 protibia, ventral view 503 mesotibia, dorsal view. Figures 504-510. 504 Saprinus (Saprinus) pacificus sp. n. male terminalia: 8th sternite + 8th tergite, ventral view 505 ditto, dorsal view 506 ditto, lateral view 507 male terminalia: 9th + 10th tergites, dorsal view; spiculum gastrale, ventral view 508 male terminalia: 9th + 10th tergites; spiculum gastrale, lateral view 509 male terminalia: aedeagus, dorsal view 510 ditto, lateral view.