Peltonotus vittatus Arrow

Jameson, Mary Liz & Wada, Kaoru, 2004, Revision of the genus Peltonotus Burmeister (Coleoptera: Scarabaeidae: Dynastinae) from Southeastern Asia, Zootaxa 502 (1), pp. 1-66 : 47-49

Peltonotus vittatus Arrow

( Figs. 12–13 , 18 , 50a–c , 64a–b , 66 )

Peltonotus vittatus Arrow 1910:157 . Holotype female at MNHN labeled: a) " North Borneo " (handwritten), b) " Peltonotus vittatus . type Arrow" (handwritten), c) "Ex Musaeo D. Sharp 1890" (typeface with scribed box), d) "G.J. Arrow Vidit 1910" (typeface), e) "Museum Paris ex Coll. R. Oberthur" (typeface, yellow label), f) " Holotype Peltonotus vittatus Arrow det M.L. Jameson and K. Wada 2002" (red label, typeface). Arrow (1910) stated that the original description was based on a single female specimen.

Description (males=3, females=4). Length 12.3–14.4 mm. Widest width 6.6–7.2 mm. Color ( Figs. 12–13 ): Head, scutellum, pygidium and venter black or castaneous; pronotum entirely reddish (female) or with black, discal macula (female) or with 3–5 vitae (male) (1 at midline, one laterad of midline, one small macula next to margin extending from apex to near base); elytron with 2 black, oblique vitae extending from near humerus to near apex, vitae of female not as pronounced as vitae of male; margins and suture dark. Dorsal surface with iridescent bloom. Head ( Fig. 18 ): Surface of frons with base impunctate, middle frons to apex moderately densely to densely punctate; punctures simple, multisetigerous; setae minute (0–5 per puncture) and moderate in length (0–1 per puncture), rufous. Surface of clypeus moderately densely punctate; punctures multisetigerous; setae minute (0–5 per puncture) and moderate in length (0–1 per puncture), rufous. Clypeus laterally weakly bowed, apex truncate, corners square, beaded; bead weakly arcuate posteriorly. Labrum broadly emarginate at middle. Mandible obliquely quadrate apicolaterally, inner apex lacking teeth (female with external edge more rounded). Mentum with apical half rounded, notched at middle; palpomere 2 simple, about 1.5 times width of palpomere 1, not dorsoventrally flattened, lacking abundant setae. Maxilla: mala lacking lamellate setal brush; stipes with setae moderately dense, long, not flattened, not curled at apex; palpomere 2 without internomedial bump. Antennal club slightly longer than segments 2–7. Pronotum: Bead lacking at base. Surface moderately densely punctate; punctures simple, unisetigerous on disc; setae minute. Lateral margin lacking long setae. Elytral sutural length: About 3.0 times length of scutellum. Elytra: Surface with 7–8 poorly developed, punctate, longitudinal striae between suture and humerus; punctures simple or ocellate, moderate in size, moderately dense. Intervals similarly sculptured. Epipleuron of female in ventral view ( Fig. 64a–b ) narrowly incised at apex; in dorsal view expansion welldeveloped, bulging slightly posterior to mid­elytra. Propygidium: Surface moderately densely punctate (disc) and rugopunctate (at basal margin); punctures simple and/or ocellate, lacking setae. Pygidium: Surface moderately densely punctate; punctures ocellate, unisetigerous or lacking setae; setae short, tawny. Venter: Prosternal keel elongate; apex projecting anteriorly at about 90° with respect to ventral plane, produced to about 1/3 of protrochanter, truncate. Legs: Foretibia of male tridentate (basal tooth poorly developed); lateral margin with short, dense setae. Foretarsomere 5 of male subequal in length to tarsomere 5; foretarsomeres 2–4 with apices weakly expanded, dorsal and ventral apices clothed with dense, short setae. Foreclaws of male with inner claw sickle­shaped, about 4 times thicker than outer claw; outer claw simply arcuate, about 1/2 the length of inner claw; empodium bulbous at base. Foreclaws of female 1/2–3/4 length of foretarsomere 5, claws angled towards venter. Meso­ and metatibial claws of male with 2 setae, claws angled toward venter, about 3/4 length of metatarsomere 5. Metatibia of male with weakly curved apical spurs; ventral spur produced to middle of metatarsomere 1, dorsal spur produced to middle of metatarsomere 2. Parameres: Fig. 50a–c .

Diagnosis. Peltonotus vittatus is the only species with the pronotum entirely reddish (female), with black discal macula (female), or with 3–5 black vitae (male). Peltonotus fujiokai is the only other species that has vittate elytra, but P. vittatus has two distinctive vitae per elytron, whereas P. fujiokai has only one vita per elytron. The following characters will separate P.vittatus from other species of Peltonotus : mandible obliquely quadrate, apex truncate, inner apex lacking teeth (female with external edge more rounded) (male trait shared with female P. pruinosus ); labrum deeply emarginate at middle (not broadly or deeply, narrowly); foretarsomeres 2–4 with apices weakly expanded (not greatly expanded).

Distribution ( Fig. 66 ). Sarawak State and Sabah State, Bornean Malaysia.

Locality records (7 specimens) from MNHN, FUJI, ZMHB .

BORNEAN MALAYSIA (7). Sarawak State (1): Kapito (15 km SW, Mt. Goram ). Sabah State (2): Elopura (dubious locality). No data (4) .

Temporal Data. May (2), October (2).

Natural History. Label data indicate that specimens were collected between 900–1170 m elevation.

Remarks. Arrow (1910) described P. vittatus based on a single female specimen with label data “ North Borneo.” Two specimens recorded from “Elopura” (Sabah State, Malaysia) are of dubious validity because this locality is near sea level and probably does not possess suitable habitat for the species of Peltonotus . Two specimens (housed at ZMHB) are labeled with an unknown locality: “Long Petak”. Limited label data for P. vittatus provide some indication that the species occurs in central Borneo and northern Borneo. Additional specimens will demonstrate whether populations of P. vittatus are contiguous throughout Borneo or if they are isolated geographically.

Figures

FIGURE 66. Distribution of Peltonotus species FIGURE 67. Distribution of Peltonotus specie in Borneo. in Borneo.

FIGURES 2–13. Dorsal habitus of: 2–4) P. fujiokai (males), 5) P. fujiokai (female), 6) P. malayensis (male), 7) P. malayensis (female), 8) P. morio (male), 9) P. morio (female), 10) P. nasutus (male), 11) P.nasutus (female), 12) P. vittatus (male), 13) P. vittatus (female).

FIGURES 14–18. Head (dorsal view) showing characters of the labrum, mandible, and clypeus. 14) P.karubei (apex of labrum deeply, narrowly emarginated; apex of mandible rounded laterally), 15) P. malayensis (apex of labrum broadly emarginate; apex of mandible rounded laterally), 16) P. morio (apex of labrum bilobed; apex of mandible quadrate laterally with broadly truncate apex; apex of clypeus without tubercle in male), 17) P. nasutus (apex of labrum bilobed; apex of mandible quadrate laterally with broadly truncate apex; apex of clypeus with weak tubercle in male), 18) P. vittatus (apex of labrum broadly emarginate; apex of mandible obliquely quadrate laterally).

FIGURES 49–50. Male genitalia in dorsal (parameres only [a]) and lateral views (parameres and phallobase [b–c]) of: 49) P. sisyrus, 50) P. vittatus.

FIGURES 61–64. Elytral epipleuron (gray, ventral view) with position of metacoxa of: 61) P. similis, 62) P. sisyrus, 63) P. suehirogarus, 64a–b) P. vittatus.