Peltonotus favonius Jameson and Wada, 2009

Jameson, Mary Liz & Wada, Kaoru, 2009, Five new species of Peltonotus Burmeister (Scarabaeidae: Dynastinae: Cyclocephalini) from Southeast Asia, Insecta Mundi 2009 (102), pp. 1-16 : 8-11

Peltonotus favonius Jameson and Wada , n. sp.

( Fig. 3 , 10 , 15 a-b, 23, 25)

Type Material. Holotype male housed at NSMT (loaned from FUJI) with following label data and with maxilla and male parameres mounted beneath specimen: a) “nr. Dalat , VIETNAM JUN. 2006.” b) our holotype label.

Description. Holotype ( Fig. 3 ). Length 14.6 mm. Widest width 7.3 mm. Color ( Fig. 3 ): Head, pronotum, scutellum, propygidium, pygidium, and venter shining black; elytra black with iridescent blue bloom. Head: Surface of frons with base impunctate, middle frons to apex moderately densely punctate; punctures simple, not setigerous. Surface of clypeus moderately densely to confluently punctate; punctures simple, not setigerous. Clypeus laterally weakly bowed, apex truncate, corners square, beaded; bead weakly arcuate posteriorly. Labrum broadly emarginate at middle. Mandible obliquely quadrate, apex truncate, inner apex with 1 tooth. Mentum with apical half rounded, notched at middle; palpomere 2 simple, slightly wider than palpomere 1, lacking setae. Maxilla ( Fig. 10 ): mala lacking lamellate setal brush; stipes with setae moderately dense, long, not flattened, not curled at apex; palpomere 2 without internomedial bump. Antennal club subequal in length to segments 2-7. Pronotum: Bead lacking at base; anterior bead complete. Surface moderately densely punctate, punctures simple, lacking setae. Lateral margin lacking long setae. Elytron: Sutural length about 4.2 times length of scutellum. Surface with 5 moderately developed, punctate, longitudinal striae between suture and humerus; punctures moderate in size, moderately dense, ocellate. Intervals with similar sculpturing. Propygidium: Surface shagreened and rugopunctate (base to mid-disc) to densely, confluently punctate (mid-disc to near apex); punctures simple. Pygidium: Surface shagreened and confluently punctate either side of mid-line; punctures simple, not setigerous. Venter: Prosternal keel elongate; apex projecting anteriorly at about 90 o with respect to ventral plane, produced to mid-height of protrochanter, truncate. Legs: Protibia (Fig. 23) of male bidentate; lateral margin lacking short, dense setae. Protarsomere 5 (Fig. 23) of male subequal in length to tarsomeres 1-4; protarsomere 3-4 with apices expanded, dorsal and ventral apices clothed with dense, short setae. Anterior claws of male with inner claw curved, about 3 times thicker than outer claw; outer claw simply arcuate, about 1/2 length of inner claw; empodium bulbous at base. Meso- and metatibial claws of male with 2 setae. Metatibia of male apical spurs weakly curved; ventral spur produced to middle of metatarsomere 1, dorsal spur produced to base of metatarsomere 2. Parameres: Fig. 15 a-b.

Diagnosis. Peltonotus favonius is most similar to P. pruinosus Arrow , a species for which males are not known and which is distributed in the Assam Valley, India. Peltonotus favonius , however, differs from P. pruinosus based on the following characters: mandible with one tooth at inner apex (lacking teeth in P. pruinosus ); palpomere 2 simple, slightly wider than palpomere 1, and with sparse setae (palpomere 2 is subequal in width to palpomere 1 and lacking setae in P. pruinosus ); propygidium rugopunctate to densely, confluently punctate with simple punctures (propygidium is moderately densely punctate with ocellate punctures laterally in P. pruinosus ), and; pygidium confluently punctate either side of mid-line in P. favonius (moderately densely punctate in P. pruinosus ).

Etymology. The specific epithet comes from the Roman wind god, Favonius, who held dominion over plants and flowers. The name is in reference to the species’ hypothesized association with aroid flowers.

Distribution ( Fig. 25 ). Vietnam.

Locality record (1 specimen) from loaned from FUJI and deposited at NSMT. VIETNAM (1). Da Lat.

Temporal Data. June (1)

Remarks. We considered that this specimen on which this species is based may be the unknown male of P. pruinosus (known only by one female), but the form of the mouthparts, propygidium, and pygidium (see “Diagnosis”) are not consistent with P. pruinosus .

In the male key to species by Jameson and Wada (2004), P. favonius keys to P. rubripennis Miyake and Yamaya. However , the difference in form of the male genitalia ( Fig. 15 ) clearly indicates that these are two distinct species.

Figures

Figure 25. Distribution of Peltonotus species in Southeast Asia and Sundaland.

Figure 1-7. Peltonotus species dorsal habitus. 1) P. animus (holotype, male). 2) P. cybele (holotype, female). 3) P. favonius (holotype male). 4) P. karubei (male paratype). 5) P. karubei (male) showing variation. 6) P. mushiyaus (holotype female). 7) P. tigerus (holotype female). Scale bar = 2 mm.

Figure 8-13. Maxilla (dorsal view) showing mala with or without lamellate setal brush (black arrow) and form. 8) P. animus (holotype). 9) P. cybele (holotype). 10) P. favonius (holotype). 11) P. karubei. 12) P. mushiyaus (holotype). 13) P. tigerus (holotype).

Figure 14-18. Male genitalia in dorsal and left lateral view. 14a-b) P. karubei. 15a-b) P. favonius (holotype). 16ab) P. malayensis. 17a-b) P. animus (holotype). 18a-b) P. silvanus.