Pukupuku arunachalensis sp. nov. (Coleoptera, Scarabaeidae, Rutelinae) from Arunachal Pradesh, India Author Devanshu Gupta Author Kailash Chandra Author Aleš Bezděk text European Journal of Taxonomy 2017 2017-01-03 257 1 11 journal article 32292 10.5852/ejt.2017.257 5183353a-133b-4453-a274-1f75169c9002 851561 urn:lsid:zoobank.org:pub:D7142011-F22B-48C0-987D-FD8015A0E985 Pukupuku arunachalensis sp. nov. urn:lsid:zoobank.org:act:4C196777-31DC-4BEC-A847-7E36ED9E01C5 Figs 1–33 Diagnosis The newly described species can be easily distinguished by its unique structure of aedeagus, shape and size of mandibles which are sharply pointed at end with a small tooth in middle at outer edge (in lateral view), and four times as long as clypeus, pronotum smooth without setae, pygidium smooth (setae absent in male, present in female). See Table 1 for detailed differential characters separating P. arunachalensis sp. nov. from P. curtus and P. katsurai . Etymology The name arunachalensis refers to the Northeastern Himalayan state of India, Arunachal Pradesh. Table 1. Differential characters (males) of Pukupuku arunachalensis sp. nov. , Pukupuku curtus (Arrow, 1919) and Pukupuku katsurai (Muramoto, 2002) .

Species / character Shape of mandibles	Pukupuku arunachalensis sp. nov. Sharply pointed at end, with a small tooth in middle at outer edge (in lateral view) (Fig. 5)	Pukupuku curtus (Arrow, 1919) Curved upward toothed at outer edge (Fig. 34)	Pukupuku katsurai (Muramoto, 2002) Curved upward and slightly inward near apex, with a long tooth before middle of upper surface (Muramoto 2002: fig. 2)
Size of mandibles	Four times as long as clypeus, 16.0 mm (Figs 4–5)	Not long, 3.0 mm in length (Fig. 34)	Twice as long as length of clypeus, 4.0–4.5 mm (Muramoto 2002: figs 1–2)
Sculpture of pronotum	Entirely smooth, without setae (Fig. 7)	Densely covered with minute setae	Densely covered with minute setae
Pygidium	Smooth, setae absent in male; in female with long setae	Impunctate covered with long setae	Coriaceous, posterior margin with a row of setae
Aedeagus	Symmetrical, differently shaped (Figs 20–22)	Symmetrical, differently shaped (Muramoto 2002: fig. 6)	Symmetrical, differently shaped (Muramoto 2002: fig. 3)
Length (including mandibles)	32.0 mm	18–19.5 mm	20.5–21 mm
Length (excluding mandibles)	20.0 mm	15–16.5 mm	16.5 mm
Width	19.0 mm	9–9.5 mm	11 mm
Distribution	Arunachal Pradesh (Figs 23–24)	Laos, North Thailand	Vietnam (Cao Bang)

Figs 1–2. Pukupuku arunachalensis sp. nov. 1 . Holotype, ♂, habitus, dorsal view. 2 . Paratype, ♀, habitus, dorsal view. Material examined Holotype INDIA : ♂ labeled: “ INDIA , Arunachal Pradesh / Namdapha / Tirap / Mizo / Vijay Nagar / 4 Oct. 1985 / collected S. Biswas ” ( ZSI Registration Number: 21630/H4A ). Paratypes INDIA : 2 ♂♂ and 3 ♀♀ , same locality data as holotype ( ZSI Registration Number: 21630/H4A to 21635/H4A ). Type locality INDIA: Arunachal Pradesh state, Tirap district (now in Changlang district), Vijay Nagar, Namdapha National Park. Type depository Deposited in the collections of the Zoological Survey of India, New Alipore, Kolkata. Description (holotype, Figs 1 , 3–24 ) MEASUREMENTS. Total body length of males (excluding mandibles): 20.0–21.0 mm (holotype 20.0 mm), total body length of females: 19.0–20.0 mm. DETAILED MEASUREMENTS. Mandibular horn: length 16.0 mm. Clypeus: length 4.0 mm, inter ocular distance (distance between inner sides of each eye) 5.8 mm. Pronotum: length 9.9 mm, maximum width 17.5 mm. Pygidium: length 4.5 mm, width 12.5 mm. Elytra: length 18.4 mm, maximum width 19.3 mm. Aedeagus: length 7.6 mm, maximum width 2.5 mm; Parameres: length 3.0 mm, maximum width 2.2 mm. BODY. Broadly oval and convex. HEAD ( Figs 3–6 ). Glabrous, entirely smooth without any hairs dorsally. Clypeus trapezoidal, convergent in basal half, anterior clypeal margin slightly arcuate with few short and long hairs, anterior angles rounded, surface with few scattered punctures in middle and at sides, slightly convex in middle, clypeofrontal suture nearly absent with only small carina at each side, vertex with moderately large rugopunctation. Area near each eye smooth and shining. Eye canthus spatulate, wide near end and small at base, surface smooth. Labrum straight with long hairs at margin. Mentum with a rather large rounded hollow at middle. Mandibles flat and broad at base, sharply pointed at end with a small tooth in middle (in lateral view), almost four times as long as length of clypeus. PRONOTUM ( Fig. 7 ). Convex, 1.9 times as wide as long, widest before middle, without any hairs or setae on dorsal surface, with rather small but indistinct punctures in middle, laterally smooth, narrowly marginate except near base, base distinctly lobed before scutellum, anterior, lateral, and hind angles rounded. SCUTELLAR PLATE ( Fig. 8 ). Triangular, base carinate, lateral sides curved, apex rounded, densely punctate on sides with a line of punctures. ELYTRA ( Figs 9–10 ). Convex, almost as wide as long, widest at middle; rather densely and closely punctate near sutural margins from base to apex, rather sparsely and finely punctate in middle and at lateral sides, entirely yellow with a brown spot behind scutellar apex near sutural margin, brown pit at base in middle, two transverse bands, one large and one small, at lateral side on humeral umbone (in lateral view), apex with a large brown band on each elytron. Figs 3–10. Pukupuku arunachalensis sp. nov. , holotype, ♂. 3 . Clypeus. 4 . Mandibular horns (dorsal view). 5 . Mandibular horns (lateral view). 6 . Mentum (arrow indicates the character separating Pukupuku from the closely related genera). 7 . Pronotum. 8 . Scutellar plate. 9 . Right elytron (dorsal view). 10 . Elytra. Figs 11–19. Pukupuku arunachalensis sp. nov. , holotype, ♂. 11 . Protibia. 12 . Apical part of mesotibia. 13 . Apical part of metatibia. 14 . 4th mesotarsomere. 15 . 4th metatarsomere. 16 . Pygidium. 17 . Prosternum. 18 . Abdomen. 19 . Meso- and metasternum. (Arrows indicate the character separating Pukupuku from the closely related genera). Figs 20–24. Pukupuku arunachalensis sp. nov , holotype, ♂. 20 . Aedeagus (dorsal view). 21 . Parameres (dorsal view). 22 . Aedeagus (lateral view). 23 . Map of India. 24 . Map of the state of Arunachal Pradesh showing the type locality. Figs 25–33. Pukupuku arunachalensis sp. nov. , paratype, ♀. 25 . Clypeus. 26 . Abdomen. 27 . Pronotum. 28 . Pygidium. 29 . Mentum. 30 . Apical part of mesotibia. 31 . Apical part of metatibia. 32 . 4th mesotarsomere. 33 . 4th metatarsomere. (Arrows indicate the character separating Pukupuku from the closely related genera). LEGS ( Figs 11–15 ). Protibae tridentate, claws not cleft. Meso- and metatibiae unidentate, outer claw with a ventral tooth respectively, 4th tarsomere of both meso- and metatibiae with a single acuminate ventroapical process with a pair of fine long setae. PYGIDIUM ( Fig. 16 ). Triangular, thrice as broad as long, without hairs. VENTER ( Figs 17–19 ). Ventral surface of thorax and metasternum densely hairy. Prosternum with a small process in middle of posterior margin, posterior face of it flat. Meso- and metasternal processes absent. Abdominal sternites brown black, not abbreviated, smooth without hairs, segments curved in shape. AEDEAGUS ( Figs 20–22 ). Symmetrical, parameres fused at base, rather flat, bare. SEXUAL DIMORPHISM ( Figs 25–33 ). Females differ from males in the following characters: oval in shape, feeble shining; anterior margin of clypeus bilobed, surface rather strongly rugopunctate, mandibles normally developed ( Fig. 25 ); pronotum rather distinctly and finely punctate ( Fig. 27 ); abdomen yellowish and shining, densely hairy with segments straight, 5th segment broadest in middle ( Fig. 26 ); pygidium densely hairy ( Fig. 28 ). COLOUR. Yellow with brown marking on lateral sides of elytra. Figs 34–35. Pukupuku curtus (Arrow, 1919) , syntype, 3 . 34 . Habitus (dorsal view). 35 . Attached labels [Source: Muséum national d’Histoire naturelle, Paris (France). Collection: Insects-Coleoptera (EC) Specimen MNHN-EC-EC1464]. Distribution So far known only from Vijay Nagar in the state of Arunachal Pradesh, India ( Figs 23–24 ). Collecting circumstances Collected at night by light after dusk.