© Biologiezentrum Linz, download www.zobodat.at Linzer biol. Beitr. 47/1 513-528 31.7.2015 A new species of the Acupalpus subgenus Stenolophidius JEANNEL, 1948 from Papua New Guinea, and redescriptions of Acupalpus (Stenolophidius) papua DARLINGTON, 1968 and Anthracus furvinus DARLINGTON, 1968 (Coleoptera, Carabidae, Harpalini, Stenolophina) Bernd JAEGER Abstract: Acupalpus (Stenolophidius) papua DARLINGTON, 1968 and Anthracus furvinus DARLINGTON, 1968 are redescribed. Acupalpus (Stenolophidius) quadrisetosus nov.sp. is described from Papua New Guinea (type locality: Papua New Guinea: Oro Prov.: Dobodura, ca. 08°45'S, 148°21'E). New distribution data are presented for Anthracus furvinus and Acupalpus papua. K ey w ords: Stenolophina, Acupalpus, subgenus Stenolophidius, Anthracus, redescriptions, new species, Papua New Guinea. Introduction The Acupalpus subgenus Stenolophidius JEANNEL, 1948 comprises 25 species which are mainly distributed in the Afrotropical and Oriental Regions. Only few species reach the southern limits of the Palaeartic Region, and three species are known from the Australian region. A revision of the Afrotropical species was provided by BASILEWSKY (1951) supplemented by descriptions of BASILEWSKY (1967) and BRUNEAU DE MIRÉ (1990), and the Oriental and East Palaeartic species have been revised recently by JAEGER (2013). The fauna of New Guinea comprises three species of the subgenus which were described or recorded by DARLINGTON (1968) from this island. Two of those, A. papua DARLINGTON, 1968 and A. ustus sensu DARLINGTON, 1968 (nec ANDREWES) represent closely related southern vicariants of Oriental taxa. The first part of this contribution provides a redescription for the former and a description for the latter species, which actually represents an undescribed species. The Anthracus annamensis group comprises 11 species from the East Palaeartic and Oriental Regions and a number of unrevised species from the Afrotropical region which are still placed in the genus Acupalpus. The only known representative from the Austra- lian region, A. furvinus was described by DARLINGTON (1968) from Papua New Guinea. This species, which was originally described as a member of the genus Acupalpus and subsequently transferred to the genus Anthracus by LORENZ (1998), belongs to the Anthracus furvus complex, whose East Palaearctic and Oriental members have been © Biologiezentrum Linz, download www.zobodat.at 514 revised recently (JAEGER 2012). The second part of this contribution provides a rede- scription of Anthracus furvinus. Material and Methods Types and material examined are deposited in the following institutions and private collections: ANIC.............................Australian National Insect Collection, CSIRO Entomology, Canberra, Australia, Dr. A. Slipinski and Ms. C. Leman BMNH..........................Natural History Museum, London, Great Britain, Ms. Chr. Taylor, Ms. Cl. Gent and Ms. B. Garner MCZ..............................Museum of Comparative Zoology, Harvard University, Cambridge, USA, Dr. Ph. D. Perkins RMNH..........................Nationaal Naturhistorische Museum „Naturalis“, Leiden, The Nether- lands, F. van Assen & H. Huijbregts cBAE.............................Working collection M. Baehr in Zoologische Staatsammlung, München, Germany, Dr. M. Baehr cJAE..............................Coll. B. Jaeger, Berlin, Germany Citations of label data, measurements, dissection procedures, preparation of images follow methods described in JAEGER (2009, 2012 and 2013). Results Acupalpus (Stenolophidius) papua DARLINGTON, 1968 (Figs 1-8) Acupalpus papua DARLINGTON, 1968: 75-76 (type locality: Papua New Guinea: Dobodura) Anthracus papua DARLINGTON: LORENZ 1998: 339 [world catalogue], 2005: 360 [world catalogue] Type material examined:Holotype:1(cid:2) (MCZ) labelled "Dobodura / Papua, N.G. / Mar-July, 1944 / Darlington"; "(cid:2)"; "det. Darlington / at B.M. 1947-48 / Notes p."; "Mers /(cid:2)" [hw]; "Holotype / Acupalpus / papua D" [hw on red paper]; "M.C.Z. / Holotype / 31392" [red paper, last line hw]; "Camera symbol / Aug-Dec 2006 / MCZ Image / Database". The holotype is in good condition, withouth missing appendages. Paratypes: 4(cid:2)(cid:2) (MCZ) labelled "Dobodura / Papua, N.G. / Mar-July, 1944 / Darlington"; "Paratype / Acupalpus / papua / Darl." [red paper] and "M.C.Z. / Paratype / 31392" [red paper, last line hw]. 1 specimen additionally with the label "Drawn 1966 / Mary Catron / no. 243". 1(cid:3) (MCZ) labelled "vic Hollandia / Dutch N.G. /July-Sept 1944 / Darlington"; "Mers / (cid:3)" [hw]; "Paratype / Acupalpus / papua / Darl."[red label] and "M.C.Z. / Paratype / 31392" [red paper, last line hw]. 1(cid:2) (BMNH) labelled “Para- / type" (circular label with yellow margin); "vic Hollandia / Dutch N.G. /July-Sept 1944 / Darlington"; "Brit. Mus. / 1975-567" [last three letters hw] and "Paratype / Acupalpus / papua / Darl."[red label]. 1(cid:2) (MCZ) labelled "Oro Bay / Papua, N.G. / Dec' 43 - Jan' 44 / Darlington"; "Paratype / Acupalpus / papua / Darl."[red label] and "M.C.Z. / Paratype / 31392" [red paper, last line hw]. All types additionally with my label "Acupalpus / (Stenolophidius) / papua / Darlington, 1968 / det. B. Jaeger 2012, 2013 or 2014". Redescr i pt i on: General appearance as figured (Fig. 1). Body length 3.6-4.2 mm (holotype 3.6 mm); width 1.6-1.8 mm. Head dark brown to blackish brown, with clypeus dark brown, labrum and mandibles © Biologiezentrum Linz, download www.zobodat.at 515 dark reddish brown, with inner margin and apices of the latter blackish. Pronotum paler than head, brown to dark brown, with lateral margin and area around hind angles yel- lowish brown. Elytra brown to dark brown, with apex, lateral margins, and sometimes also first interval indistinctly paler. Antennae with first two antennomeres dark yellow- ish, remaining ones brown. Palpi and legs paler to darker yellowish. Ventral surface mainly brown to dark brown, but pro- and metasternum often markedly paler reddish brown, and last, or last two abdominal sternites vaguely paler brown. Epipleura brown. Pronotum weakly, elytra clearly iridescent. Head (Figs 1-3) including eyes 0.79-0.83 times as wide as pronotum, with eyes large and markedly prominent (head 1.69-1.79 times as wide as head between eyes). Labrum, with apical margin weakly emarginate medially, not asymmetric. Left mandible moderately long, faintly obtuse at apex, not thickened or truncate. Antennae comparatively short, 2.50-2.65 times as long as pronotum and 0.80-0.87 times as long as elytra. Microsculp- ture distinct, on labrum with weakly transverse, on clypeus with almost isodiametric meshes, on frons and vertex with distinct isodiametric meshes becoming moderately transverse in front of pronotal apical margin. Pronotum (Figs 1-3) 1.42-1.49 times as wide as long, 1.21-1.26 times as wide as head, widest in second quarter, lateral seta inserted at beginning of second quarter. Apical margin almost rectilinear, faintly bordered laterally. Anterior angles narrowly rounded at tips, not or only weakly projecting forward. Sides convex in anterior half or two thirds and at posterior half or third rectilinearly converging to base, or very faintly sinuate in front of the latter. Posterior angles distinct and rather sharp at apices. Basal margin be- tween posterior angles about 1.08-1.13 times as wide as apical margin between anterior angles, and 0.80-0.84 times as wide as maximum pronotal width, arcuate medially and oblique to posterior angles, not bordered at sides. Lateral furrows evenly wide in anterior half, becoming markedly widened in posterior half or third where they are fused with baso-lateral impressions. Baso-lateral impressions rather large and deep, clearly sepa- rated from the convex pronotal disc and median part of base, flattened to the markedly reflexed basal and lateral margins. Base with rather coarse and close punctation in the lateral impressions, between impressions impunctate or with only few single punctures. Pronotal surface at anterior quarter without punctation. Median line fine and impunctate, disappearing before reaching apical and basal margins. Anterior transverse impression at least suggested. Microsculpture with very lightly impressed strongly transverse meshes on disc, and weakly transverse to almost isodiametric meshes at baso-lateral impressions. Macropterous. Elytra (Fig. 1) 1.38-1.48 times as long as wide, 3.04-3.16 times as long and 1.46-1.52 times as wide as pronotum. Surface moderately convex. Sides moderately enlarged posteriorly, widest just behind middle, subapical sinuation moderate to distinct. Elytral striae weakly impressed and impunctate, scutellar striole long. Intervals rather flat and wide on disc, becoming somewhat narrowed and weakly convex in front of apex. Basal pore at beginning of scutellar striole present, interval 3 in third quarter with one setiferous pore, adjoining stria 2. Microsculpture on elytral intervals nearly obliterated, only here and there very lightly impressed transverse meshes and line rudiments visible. Scutellum and its nearest surrounding with isodiametric meshes. © Biologiezentrum Linz, download www.zobodat.at 516 Figs. 1-3: Acupalpus (Stenolophidius) papua DARLINGTON. Habitus, head and pronotum. (1, 3) Paratypes, PNG, Dobodura, (2) Holotype. © Biologiezentrum Linz, download www.zobodat.at 517 Figs. 4-8: Acupalpus (Stenolophidius) papua DARLINGTON. Median lobe of aedoeagus, lateral and dorsal aspect. (4, 7) Paratype, PNG, Hollandia; (5, 6, 8) Paratypes, PNG, Dobodura. © Biologiezentrum Linz, download www.zobodat.at 518 Ventral side: Prosternum medially with 6-8 and in front of anterior margin with 3-4 long erect setae. Metepisterna at inner margin about 1.4 times as long as wide at basal margin. Abdominal sternite 2-3 medially, 4 at medial two quarters and 5-6 entirely with moderate pubescence. Last visible sternite in males with two and in females with four longer setae at apical margin. Legs: Pro- and mesotarsomeres 2-4 of males with biseriately arranged adhesive hairs on ventral surface. Aedoeagus (Figs 4-8) medium sized, with lateral sclerotization markedly reduced at medial portion and in some specimens replaced by a reddish swelling or dilatation typical for members of Stenolophidius. The internal sac shows the characteristic ground composition of structures for a Stenolophidius species (see JAEGER 2013) without signifi- cant specific modifications. Comparisons: A. papua is closely related to A. sinuellus BATES from continental SE Asia and represents probably a southern vicariant of the latter. Both species are rather similar in general appearance, colour and also in aedeagal features, the latter do not provide significant differences. However, though similar A. papua differs externally by the pronotal shape which is on average more transverse and has rather acute hind angles usually with sharp tips (in sinuellus more obtuse with tips usually narrowly rounded), the shorter elytra (EL/EW 1.38-1.48 in A. papua and 1.50-1.62 in A. sinuellus) and the microsculpture on head which is rather distinct on frons (instead of obliterated or represented by mesh rudiments in A. sinuellus). From A. quadrisetosus nov.sp. which occurs sympatrically at least at Dobodura, A. papua differs by its larger size, the darker antennae which leaves only the first or the first two antennomeres yellowish (in A. quadrisetosus entirely yellowish), larger and strongly produced eyes, the more transverse pronotum, and the elytra which are longer (EL/PL: in A. quadrisetosus 2.85-2.89) and broader (EW/PW: in A. quadrisetosus 1.43-1.45) rela- tive to pronotum. From A. brunnicolor (SLOANE) which is not treated here (one syntype deposited in ANIC, has been examined by me), but occurs also in New Guinea, A. papua can be easily separated by the different colour and shape of the pronotum (reddish yellow, with widely rounded hind angles in A. brunnicolor). Di st r i but i on: The species is so far known only from Papua New Guinea. In addition to the type material one male from the following locality has been studied: Papua New Guinea: Madang Province, Baiteta, canopy mission, light AR 27, VII. 1995, Missa (1 - cBAE) This specimen agrees with the members of the type series in size, colour, microsculpture and general appearance, but differs slightly by the shape of the pronotum which is weakly narrower and longer. Acupalpus (Stenolophidius) quadrisetosus nov.sp. (Figs 9-17) Acupalpus ustus ANDREWES: DARLINGTON 1968: 73, 75 [partim: specimens from Dobodura and Popondetta] Type material: Holotype: (cid:2) (MCZ) labelled "Dobodura / Papua N.G. / Mar-July, 1944 / Darlington", "(cid:2)", "ustus / det. Darlington / at B.M. 1947-48 / Notes p." [first line hw], "Mers (cid:2)" [hw], "Acupalpus / ustus Andr. / det. Darl. '66" and "HOLOTYPE (cid:2) / Acupalpus / (Stenolo- phidius) / quadrisetosus sp.n. / des. B. Jaeger 2013". The holotype is in good condition without missing body parts. © Biologiezentrum Linz, download www.zobodat.at 519 Figs. 9-11: Acupalpus (Stenolophidius) quadrisetosus nov.sp. Habitus, head and pronotum. (9) Holotype, (10, 11) Paratypes, PNG, Dobodura. © Biologiezentrum Linz, download www.zobodat.at 520 Paratypes: 9(cid:2)(cid:2), 15(cid:3)(cid:3) (MCZ, cJAE) labelled "Dobodura / Papua N.G. / Mar-July, 1944 / Darlington" and "Acupalpus / ustus Andr. / det. Darl. '66", 1(cid:2) additionally with "Mers. / (cid:3)". 1(cid:2) (RMNH) with same locality and identification labels, and additionally "Museum Leiden / ex. collection / C.J. Louwerens / rec. 1979" and "Acupalpus / (Stenolophidius) / ustus / Andrewes, 1930 / det. B. Jaeger 2011". 1(cid:2) (BMNH) labelled "Dobodura / Papua N.G. / Mar-July, 1944 / Darlington" and "Acupalpus / ustus Andr. / det. Darl. '66". 1(cid:2) (MCZ) labelled "NEW GUINEA: SE. / Popondetta, 60m / 30-31.VIII. '63" and "J. Sedlacek / Light Trap / BISHOP" and "Acupalpus / ustus Andr. / det. Darl. '69". 1(cid:3) (MCZ) labelled "NEW GUINEA: SE. / Popondetta, 60m / 31.VIII.-2.IX. '63" and "J. Sedlacek / Light Trap / BISHOP" and "Acupalpus / ustus A. / det. Darl. '69". All paratypes additionally labelled "PARATYPE (cid:2) or (cid:3) / Acupalpus / (Stenolophidius) / quadrisetosus sp.n. / des. B. Jaeger 2013". Descr i pt i on: General appearance as figured (Fig. 9). Body length 3.0-3.4 mm (HT 3.3); width 1.3-1.5 mm. Head blackish brown, with clypeus brown or dark yellowish brown, labrum and mandi- bles (tips darkened) paler to darker yellowish brown, palpi and antennae yellowish. The latter sometimes with antennomeres 4-11 with a thin longitudinal dark stripe. Pronotum dark brown or blackish brown, often paler than head and elytra, with apical margin and base laterally somewhat paler. Elytra blackish brown, with base, lateral margin and first interval paler reddish brown. Legs yellowish brown. Ventral surface mainly brown to dark yellowish brown, with head and proepisterna often darker brown. Pronotum weakly, elytra markedly iridescent. Head (Figs 9-11) including eyes, moderately wide, 0.75-0.80 times as wide as pronotum, with eyes moderately prominent (head 1.49-1.61 times as wide as head between eyes). Left mandible sharp to somewhat obtuse at apex, not thickened or truncate. Labrum at apical margin rounded, not asymmetric. Antennae rather short 2.33-2.50 times as long as pronotum and 0.81-0.86 times as long as elytra. Microsculpture on labrum with isodia- metric, on clypeus with isodiametric to moderately transverse meshes, on frons with isodiametric meshes becoming somewhat transverse laterad, and on vertex posterior to eyes with faint and strongly transverse meshes. Pronotum (Figs 9-11) 1.34-1.41 times as wide as long, 1.26-1.33 times as wide as head, widest in second quarter, lateral seta inserted somewhat posterior to beginning of second quarter. Apical margin weakly to moderately emarginate, faintly bordered laterally. Anterior angles narrowly rounded at tips, weakly to moderately projecting forward. Sides convex in anterior two thirds, rectilinearly converging at posterior third, not or very faintly sinuate in front of pronotal base. Posterior angles distinct and sharp. Basal margin between posterior angles slightly wider as apical margin between anterior angles, and 0.78-0.81 times as wide as maximum pronotal width, weakly arcuate medially and almost straight or slightly oblique to posterior angles, not bordered at sides. Lateral fur- rows narrow, becoming widened and confluent with baso-lateral impression at basal half or third. Baso-lateral impressions rather large and deep, clearly delimited from the con- vex pronotal disc and the somewhat depressed middle portion of base, flattened to basal and lateral margin, which are weakly reflexed. Base with rather coarse, but not very close punctation in the baso-lateral impressions, sometimes extending somewhat forward along sides, between impressions impunctate or with few small punctures. Surface otherwise impunctate. Median line very fine, impunctate, disappearing before reaching apical and basal margins. Anterior transverse impression obsolete or only suggested. Microsculpture strongly obliterated, only here and there traces of fine transverse lines are visible, which are more distinct at baso-lateral impressions. © Biologiezentrum Linz, download www.zobodat.at 521 Figs. 12-17: Acupalpus (Stenolophidius) quadrisetosus nov.sp. Median lobe of aedoeagus lateral and dorsal aspect. (12) Holotype; (13-17) Paratypes, Dobodura. © Biologiezentrum Linz, download www.zobodat.at 522 Macropterous. Elytra (Fig 9) 1.38-1.44 times as long as wide, 2.80-2.95 times as long and 1.43-1.51 times as wide as pronotum. Sides weakly to moderately widened posteri- orly, widest behind middle, subapical sinuation moderate. Elytral striae weakly im- pressed and impunctate, scutellar striole long. Intervals rather flat and wide on disc, becoming narrowed and weakly convex in front of apex. Basal pore at beginning of scutellar striole present, interval 3 in third quarter with one setiferous pore, adjoining stria 2. Microsculpture on elytral intervals only with indistinct traces of transverse lines, scutellum with almost isodiametric meshes. Ventral side: Prosternum medially with six longer erect setae. Metepisterna compara- tively short, though distinctly narrowed posteriorly, at inner margin about 1.3 times longer as wide at basal margin. Abdominal sternite 4-6 usually moderately pubescent, in sternite 4 pubescense lacking laterally. Last visible sternite in males and females with four longer setae at apical margin. Legs: Protarsomeres 2-4 and mesotarsomeres 3-4 of males with biseriately arranged adhesive hairs on ventral surface. Aedoeagus (Figs 12-17): Comparatively small, with typical reduced lateral sclerotization which is replaced by a reddish swelling or dilatation in some specimens. Internal sac with no significant specific structures. Comparisons and remarks: A. quadrisetosus nov.sp. was reported as A. ustus ANDREWES from Papua New Guinea (specimens from Dobodura and Popondetta) by DARLINGTON (1968: 75) who noted "My identification is tentative, although based on comparison of specimens with the type." A. quadrisetosus is in general appearance actually rather similar to A. ustus ANDREWES from Sumatra and Kalimantan and repre- sents obviously a closely related southern vicariant of the latter. It differs from A. ustus by the generally darker body with head blackish instead of reddish or brown, pronotum dark brown instead of reddish or pale brown and elytra blackish brown instead of reddish to dark brown, the microsculpture on frons of head which is much more distinct (very lightly impressed and partly obliterated in A. ustus), the eyes which are weakly smaller (HW/HWbE in A. quadrisetosus mostly < 1.60 in A. ustus > 1.58), the pronotum which is broader relative to head (PW/HW > 1.25, in A. ustus < 1.26), the elytra which are broader and shorter (EL/EW < 1.45, in A. ustus > 1.43), and the chaetotaxy of the anal sternite, which is at apical margin quadrisetose in males of A. quadrisetosus instead of bisetose in males A. ustus. However, the latter character needs verification because it might be that in the two old paratype male specimens of A. ustus the outer two setae were broken, though I was not able to detect any insertion pore. The median lobe of the aedoeagus is rather similar in both taxa but in A. quadrisetosus it is more clearly curved ventrad. From A. brunnicolor and A. papua which also occur in New Guinea, the latter species even sympatrically at Dobodura, A. quadrisetosus differs by its smaller size, the colour of antennae with antennomeres 3-11 not darkened, the shape of the pronotum with sides almost rectilinearly narrowed to the sharp posterior angles, and the smaller and less produced eyes. It should be remarked that the single specimen from "vic. Hollandia" which DARLINGTON (1968) reported also as A. ustus does not belong to the new species described here. It represents probably an undescribed species close to A. papua DARLINGTON. D i s t r i b u t i o n : A. quadrisetosus nov.sp. is so far known only from Papua New Guinea.