Peltonotus gracilipodus Jameson and Wada, 2004

Jameson, Mary Liz & Wada, Kaoru, 2004, Revision of the genus Peltonotus Burmeister (Coleoptera: Scarabaeidae: Dynastinae) from Southeastern Asia, Zootaxa 502 (1), pp. 1-66 : 21-23

Peltonotus gracilipodus Jameson and Wada , n. sp.

( Figs. 20 , 41a–c , 53 , 65 )

Type material. Holotype male housed at WADA with following label data, male genitalia and mouthparts mounted beneath specimen: a) " Harau Valley Paya Kumbuh Near Bukit Tinggi Central Sumatra INDONESIA " (typeface), b) " X 1987 leg. Marlis Elis " (typeface and handwritten), c) "K. WADA Col No. 029" (typeface, yellow label), d) our holotype label . Allotype female at UNSM with identical label data and our allotype label. Ten paratypes (3 males, 7 females) housed at FUJI, NSMT, WADA, UNSM, BCRC, and MNHN with our paratype labels. One female paratype with label data identical to holotype and our paratype label. One female paratype with label data: a) "Harau Valley Paya Kumbuh C. SUMATRA III–IV 1992 leg. Sarimudanas " (typeface) and "Collection of Mary Liz Jameson" (typeface). One female paratype with identical locality and collector data, but date " VII–XII 1992." Two male paratypes with identical locality and collector data, but date " IV 1989 " and " Collection of Mary Liz Jameson " (typeface) or “Kaoru Wada Collection” (typeface). Two female paratypes with identical locality and collector data, but dates “XI, 1992­I, 1993” and “VI­VIII­1989” and “Kaoru Wada Collection 2002” (typeface). One male paratype at BCRC with label data: a) “BURMA, Tenasserim, 4­1995” (typeface and handwritten; locality data suspect), b) “ Peltonotus pruinosus Arrow Kabakov. det.” (handwritten), c) “incorrect locality? Congeners from Sumatra. Det. M.E. Jameson 2003” (handwritten and typeface), and our paratype label. One female paratype with label data: a) "[Pang Kavan] W. Sumatra Is. INDONESIA. VI.1995 leg." (typeface and handwritten), b) "KAORU WADA COLLECTION" (typeface), c) "Collection of Mary Liz Jameson" (typeface). One female paratype at MNHN with label data: a) “ Sumatra, Siboga, III.1903 ” (typeface), b) Peltonotus malayensis Arrow co­type ♀ ” (handwritten), c) “ G. J. Arrow vidit 1910” (typeface), d) “Museum Paris ex. Coll. R. Oberthur ” (typeface, yellow label), e) " Peltonotus malayensis Arrow ♀ Paralectotype " (our yellow paralectotype label), f) Peltonotus gracilipodus Jameson and Wada Paratype.

Description. Holotype male. Length 16.8 mm. Widest width 8.0 mm. Color: Head, pronotum, scutellum, pygidium, elytron, and venter castaneous. Elytra with weak iridescent bloom Head: Surface of frons with base impunctate (middle) to sparsely punctate (laterally), middle frons to apex moderately densely punctate; punctures simple, multisetigerous; setae minute (1–12+ per puncture) and moderately long adjacent to eye (0–1 per puncture). Surface of clypeus moderately densely punctate, more dense laterally; punctures simple, multisetigerous; setae minute (1–12+ per puncture) and short near margin (0– 1 per puncture). Clypeus laterally weakly bowed, apex truncate, corners square, beaded; bead not weakly arcuate posteriorly. Labrum broadly narrowly emarginate at middle. Mandible with external edge rounded, inner apex with 2 weak teeth. Mentum with apical half rounded ( Fig. 20 ), notched at middle; palpomere 2 dorsoventrally flattened, about 3 times width of palpomere 1, setose; setae dense, moderately long, rufous, weakly thickened, some curled. Maxilla: mala with dense lamellate setal brush; stipes with setae dense, long, flattened at apex, curled at apex; palpomere 2 with internomedial bump. Antennal club subequal to segments 2–7. Pronotum: Bead lacking anterior to scutellum. Surface moderately densely punctate; punctures simple, unisetigerous; setae short. Lateral margin lacking long setae. Elytral sutural length: About 4.5 times length of scutellum. Elytra: Surface with 7 poorly developed, punctate, longitudinal striae between suture and humerus; punctures ocellate, moderate in size, moderately dense, multisetigerous apically; setae minute (1–12+ per puncture). Intervals similarly sculptured. Propygidium: Surface shagreened and moderately densely punctate; punctures simple, unisetigerous, with a transverse row near apex; setae short, rufous. Pygidium: Surface densely punctate; punctures ocellate, multisetigerous; setae minute (7–12+ per puncture) and short (0–1 per puncture). Venter: Prosternal keel elongate; apex projecting anteriorly at about 90° with respect to ventral plane, produced to about 3/4 of protrochanter, truncate. Legs: Foretibia of male bidentate; lateral margin with short, dense setae. Foretarsomere 5 subequal in length to tarsomeres 1–4, greatly thickened; foretarsomeres 3–4 with apices expanded, dorsal and ventral apices of tarsomeres 1–4 clothed with small patch of dense, short setae. Foreclaws with inner claw broadly curved, about 3 times thicker than outer claw; outer claw elongate­arcuate, about 1/2 the length of inner claw; empodium bulbous at base. Meso­ and metatibial claws of male with 2 setae, claws angled toward venter, about 3/4 length of metatarsomere 5. Metatibia of male with apical spurs weakly curved; ventral spur produced to middle of metatarsomere 1, dorsal spur produced to middle of metatarsomere 2. Parameres: Fig. 41a–c .

Allotype Female. Differs from the holotype in the following respects. Length 16.4 mm. Widest width 8.1 mm. Color: Head, pronotum, scutellum, propygidium, pygidium, and venter black; elytra black with iridescent bloom. Head: Surface of frons with setae minute (1–12+ per puncture). Surface of clypeus with setae minute (1–12+ per puncture). Pronotum: Punctures lacking setae. Elytron: Surface at apex lacking minute setae. Epipleuron of female in ventral view expanded, broadly incised at sternite 4; in dorsal view expansion well­developed ( Fig. 53 ). Legs: Foreclaws 1/2 length of foretarsomere 5, angled toward the venter.

Paratypes (3 males, 7 females). Differ from the holotype and allotype in the following respects. Length 14.4–16.1 mm. Widest width 8.2– 7.5 mm. Head: Surface of frons and clypeus in female with multisetigerous punctures; setae minute (0–12 per puncture).

Etymology. The specific epithet “ gracilipodus ” refers to the slender fifth foretarsomere in the male (gracilis = slender, podus = foot). This is compared with the sister species, P. podocrassus , in which the males have an enlarged, robust fifth foretarsomere.

Diagnosis. Peltonotus gracilipodus closely resembles P. podocrassus . Males of P. gracilipodus and P. podocrassus are easily separated from other species of Peltonotus due to the metatibial spur that is subequal or slightly longer than metatarsomere 1 (the metatibial spur is usually subequal in length to metatarsomeres 1–2). Peltonotus gracilipodus differs from P. podocrassus by the form of the fifth foretarsomere in the male (slender in P. gracilipodus , robust in P. podocrassus ), palpomere 2 of the mentum that possesses curled setae ( Fig. 20 ), and palpomere 2 of mala that possesses curled setae curled and an internomedial bump.

Distribution ( Fig. 65 ). Central Sumatra, Indonesia.

Locality records (12 specimens) from BCRC, WADA, MLJC, MNHN .

INDONESIA (SUMATRA). West Sumatera Province (9): Harau Valley (Paya Kumbuh near Bukit Tinggi), Pang Kavan, Siboga .

Temporal Data. March (2), April (2), June (2), July (1), October (3), November (1).

Remarks. We suspect that the locality data on one male paratype from Myanmar (labeled as “ Burma ”) is incorrect because of its disjunct distribution (all other specimens are distributed in central Sumatra). In every respect, this unique male is conspecific with other specimens of P. gracilipodus .

Figures

FIGURE 65. Distribution of Peltonotus species in Southeast Asia and Sundaland.

FIGURES 19–28. Mentum, dorsal view of: 19) P. deltamentum, 20) P. gracilipodus, 21) P. kyojinus, 22) P. malayensis, 23) P. podocrassus, 24) P. nasutus, 25) P. nethis, 26) P. pruinosus, 27) P. similis, 28) P. sisyrus.

FIGURES 40–42. Male genitalia in dorsal (parameres only [a]) and lateral views (parameres and phallobase [b–c]) of: 40) P.fujiokai, 41) P. gracilipodus and P. podocrassus, 42) P.karubei.

FIGURES 51–55. Elytral epipleuron (gray, ventral view) with position of metacoxa of: 51) P. brunnipennis, 52) P. fujiokai, 53) P. gracilipodus, P. podocrassus, P. silvanus, 54) P. kyojinus, 55) P. malayensis.