Peltonotus talangensis Jameson & Jakl, 2010

Jameson, Mary & Jakl, Stanislav, 2010, Synopsis of the aroid scarabs in the genus Peltonotus Burmeister (Scarabaeidae, Dynastinae, Cyclocephalini) from Sumatra and description of a new species, ZooKeys 34 (34), pp. 141-152 : 148-152

Peltonotus talangensis Jameson & Jakl , sp. n.

urn:lsid:zoobank.org:act:B054C6BA-51E5-4E49-BBB3-B63CB89551A9

Figs 4, 7, 10, 13, 17, 22a–b, 23

Type Material. Holotype male housed at NMPC with the following label data and with male genitalia, mentum, and maxillae mounted beneath specimen: a) “ West Sumatra, Mt. Talang , 1500m, II-2006, Col. Stan Jakl ” (type set), b) our holotype label . Allotype female labeled as male but with our allotype label (deposited at NMPC). 116 paratypes (95 males, 21 females) with label data as holotype and our paratype labels. Fifty eight paratypes deposited in SJC, ten in MLJC, and four in each of the following institutions: BCRC, BMNH, FMNH, FUJI, MNHN, NMPC, NSMT, RMNH, UNSM, USNM, WADA, ZMHB .

Description of holotype (male). Length 14.1 mm. Widest width 6.8 mm. Color (Fig. 4): Head, pronotum, scutellum, pygidium, elytron, and venter castaneous. Elytra lacking iridescent bloom. Head: Surface of frons at base sparsely punctate, disc and apex moderately densely (base) to densely (apex) punctate; punctures simple, moderate in size, some unisetigerous; setae short and moderately long, mixed. Surface of clypeus moderately densely punctate (base) to densely punctate (margins); punctures simple, moderate in size (base) to small (apex), some unisetigerous; setae moderately long. Clypeus laterally weakly arcuate, corners square, apex truncate, beaded; bead not weakly arcuate posteriorly. Labrum broadly emarginate at middle. Mandible with external edge rounded, inner apex with 1 poorly developed tooth. Mentum with apical half triangular (Fig. 10), notched at middle; palpomere 2 dorsoventrally flattened, about 1.5 times width of palpomere 1, setose; setae dense, moderately long, rufous, weakly thickened, not curled at apices. Maxilla (Fig. 7): Mala with lamellate setal brush; stipes with setae dense, long, not flattened at apex, not curled at apices; palpomere 2 with poorly developed internomedial bump. Antennal club slightly longer than segments 2–7 combined. Pronotum: Basal bead lacking anterior to scutellum; anterior bead incomplete. Surface moderately densely punctate, more so laterally; punctures simple, lacking setae. Lateral margin lacking long setae. Elytron: Sutural length about 4.0 times length of scutellum. Surface shagreened with 5 moderately developed, impressed, punctate, longitudinal striae between suture and humerus; punctures ocellate, moderate in size, moderately dense, lacking setae. Intervals similarly sculptured. Propygidium: Surface densely punctate, some contiguous (disc) to confluently punctate (laterally); punctures simple, moderate in size, unisetigerous; setae short, tawny and rufous. Pygidium: Surface densely punctate, more so laterally; punctures ocellate, unisetigerous; setae short, rufous. Venter: Prosternal keel elongate; apex projecting anteriorly at about 90° with respect to ventral plane, extends to about a quarter of the height of protrochanter, truncate. Legs: Protibia (Fig. 13) of male tridentate; lateral margin lacking short, dense setae. Protarsomere 5 subequal in length to tarsomeres 1–4 combined, moderately thickened; protarsomeres 3–4 with apices weakly expanded, dorsal and ventral apices of tarsomeres 1–4 clothed with dense, short setae. Anterior claws with inner claw broadly curved, about 2 times thicker than outer claw; outer

ĮĮ Peltonotus animus , Į2 Peltonotus cybele , Į3 Peltonotus talangensis , male male male

Į4 Peltonotus Į5 Peltonotus Į6 Peltonotus Į7 Peltonotus cybele gracilipodus sisyrus talangensis

Figures ĮĮ–Į7. Right foreleg of male, dorsal view, showing form. ĮĮ P. animus (holotype, male) Į 2 P. cybele (male) Į 3 P. talangensis (paratype, male). Female elytral epipleuron (gray, ventral view) with position of metacoxa Į 4 P. cybele (holotype) Į 5 P. gracilipodus Į 6 P. sisyrus Į 7 P. talangensis (allotype, female). Epipleura all the same scale.

claw elongate-arcuate, about half length of inner claw; empodium bulbous at base. Meso- and metatibial claws of male with 2 setae, claw angled toward venter, about half length of metatarsomere 5. Metatibia of male with apical spurs nearly straight; ventral spur produced to middle of metatarsomere 1, dorsal spur produced to apex of metatarsomere 1. Parameres: Fig. 22a–b.

Allotype (female). Differs from the holotype male in the following respects: Length 15.2 mm. Widest width 7.2 mm. Elytron: Epipleuron (Fig. 17) in ventral view simple, terminating adjacent to sternite 3; in dorsal view, expansion not developed.

Figure Į8. Male genitalia in dorsal and left lateral view. Į8a–b Phallobase and parameres of P. animus (holotype) Į9a–b Phallobase and parameres of P. cybele 20a–b Parameres a and phallobase plus parameres b of P. gracilipodus 2Įa–b Parameres a and phallobase plus parameres b of P. sisyrus . 22a–b Phallobase and parameres of P. talangensis (holotype).

Propygidium: Surface moderately densely punctate, some punctures confluent laterally; punctures simple, small, moderate in size (mixed). Legs: Anterior claws half length of protarsomere 5, angled toward venter.

Paratypes (females=21, males=95). Differ from the holotype and allotype in the following respects: Color: Elytron castaneous with weak reddish undercolor.

Diagnosis. Peltonotus talangensis is distinguished from other Sumatran Peltonotus species based on the form of the mentum that is triangular in the apical half (Fig. 10; shared with P. sisyrus ); surface of frons and clypeus unisetigerous (shared with P. cybele ; multisetigerous in P. sisyrus , P. gracilipodus and P. animus ); the short prosternal keel that extends to about a quarter of the height of the protrochanter (in all other species of Peltonotus , the prosternal keel extends one third to three quarters the height of the protrochanter); and the simple female epipleuron (Fig. 17). Outside of Sumatra, P. talangensis shares the triangular apex of the mentum with P. deltomentum from Kalimantan on the island of Borneo.

Locality records ( Fig. 23 ) (n=118). SUMATRA. West Sumatera Province (118): Mt. Talang (1500m).

Temporal data. February (118).

Remarks. Peltonotus talangensis was collected at 1450 m elevation on the southern slopes of Mt. Talang in the Diatas Lake region (February 15–16, 2006). This locality is home to a number of endemic species (including a new species of Cetoniinae ) and is climatically much cooler (even at 1000 m elevation) than other volcanoes in the region. Specimens were collected at lights for two nights only, after which adult flight activity completely ceased, although collecting in the region was on-going.

Acknowledgments

We thank the curators named in “Methods” for loans of specimens. Auto-Montage images were made possible by an NSF Multi-user Equipment grant (DBI 0500767) to M. L. Jameson and F. Ocampo. We thank Max Barclay and Malcolm Kerley (Natural History Museum, London) for obtaining the curation grant that initiated our collaboration. This research was supported, in part, by a collaborative NSF research grant (DBI 0743783) to M. L. Jameson et al.

Figures

Figure 23. Distribution of Peltonotus species in Sumatra.