Anthelephila sunda, Kejval, 2019

Kejval, Zbyněk, 2019, Studies of the genus Anthelephila Hope (Coleoptera: Anthicidae). Part 19. New species from Indonesia and Malaysia, Acta Entomologica Musei Nationalis Pragae 59 (1), pp. 171-184 : 182-183

Anthelephila sunda sp. nov.

( Figs 40–44 , 54 )

Type locality. Indonesia, Sumatra, Riau Province, Bukit Tigapuluh National Park, 0°50′S 102°26′E.

Type material. HOLOTYPE: ♂, ‘ E SUMATRA, Riau prov., BUKIT TIGAPULUH N.P. , 0°50′S 102°26′E, 18.-25.i.2000, J. Bezděk lgt. [p]’ ( NMPC). PARATYPES: 4 ♀♀, same data as holotype ( ZKDC); 4 ♀♀, same data, except: ‘ D. Hauck lgt.’ ( ZKDC).

Additional material examined. INDONESIA: SUMATRA: 1♀, Lampung prov., 5 km SW of Liwa, Bukit Barisan Selatan National Park , 5°4′S 104°4′E, ca 600 m, 7.–17.ii.2000, J. Bezděk lgt. ( ZKDC).

Description. Male (holotype). Body length 4.8 mm. Head and pronotum dark reddish-brown, elytra black, unicolorous ( Fig. 54 ); femora brownish-black, tibiae and tarsi black; antennae black in terminal half/third, basal 2‒4 antennomeres paler, reddish-brown.

Head 1.2 times as long as wide, somewhat produced postero-medially (widely parabolic) and weakly differentiated from short neck; tempora strongly narrowing posteriad, posterior angles absent. Eyes medium-sized, rather convex. Dorsal surface glossy, delicately punctate; punctures widely separated. Setation subdecumbent; scattered longer tactile setae.Antennae at most slightly enlarged in terminal third; antennomere I 2.3 times, X 2.1 times, XI 3.6 times as long as wide.

Pronotum 1.4 times as long as wide, distinctly narrower than head including eyes, nearly evenly rounded anteriorly, narrowed and rather sharply impressed (constricted) postero-laterally in dorsal view; pronotal disc evenly shaped, strongly convex in lateral view. Surface smooth and glossy, including posterior third; disc sparsely punctate, similarly as head; lateral sides largely impunctate, postero-lateral impressions coarsely wrinkled. Setation as on head.

Mesoventrite quite simple; metaventrite moderately impressed medially and more distinctly punctate submedially.

Elytra rather short, 1.5 times as long as wide, conjointly rounded apically; humeri distinct, postscutellar impression absent. Surface glossy, sparsely, rather evenly punctate; punctation double, setiferous punctures delicate, widely separated. Setation uniform, nearly decumbent, especially in basal third; scattered longer tactile setae.

Metathoracic wings developed.

Fore legs partly modified ( Fig. 40 ); profemora simple; protibiae with distinct, tooth-like protrusion on inner side, close behind mid-length; all tibiae with two terminal spurs; penultimate tarsomere widened/flattened distally, with terminal tarsomere articulated dorsally near base for all tarsi.

Abdominal sternum VII ( Fig. 41 ) distinctly emarginate and with short, wide median process. Sternite VIII ( Fig. 42 ); paired prongs simple, straight, narrowed apically, with dense short, coarse setae dorso-laterally in apical half. Tergum VII rather convex and distinctly produced posteriorly, rounded apically. Tergite VIII forming a pair of sclerites, narrowly connected postero-medially, widely rounded to subtruncate apically. Apical sclerite of segment IX inconspicuous, weakly sclerotized, narrowly rounded apically. Aedeagus ( Figs 43, 44 ); apical portion of tegmen 0.8 times as long as basal-piece, bilobed apically; median lobe with peculiar spinulose scale-like structures ( Fig. 44 ).

Female. Externally differing from male as follows: fore legs quite simple; metaventrite simple, evenly sparsely punctate; abdominal sternum VII produced and narrowly rounded to subtruncate apically; tergum VII sharply truncate and slightly emarginate apically.

Variation. Body length (♂ ♀) 3.6–4.2 mm.

Differential diagnosis. Anthelephila sunda sp. nov. is externally similar to A. bogorensis , A. gibbithorax , A. modiglianii , and A. selamatra sp. nov., that are all distributed on Sumatra, Java or Mentawai Islands. It may resemble especially A. bogorensis from Sumatra and Java and A. modiglianii from Mentawai in partly reddish-brown colouration, but differs in evenly convex pronotal disc (lacking median longitudinal impression, indicated in the latter two species), in rather conspicuous tooth-like protrusion of protibiae, situated closely behind its mid-length, in emarginate male sternum VII, with distinct median process, bilobed apex of tegmen, and in more robust, apically simply narrowed prongs of sternite VIII.

Etymology. Named after the Sunda, a group of islands including Sumatra; noun in apposition.

Distribution. Indonesia (Sumatra).

Figures

Figs 40–44. Anthelephila sunda sp. nov., male, holotype: 40 – protibia; 41 – sternum VII; 42 – prongs of sternite VIII; 43 – apical portion of tegmen; 44 – structure of median lobe. Scale bars: 0.2 mm – A (Fig. 44), B (Fig. 42), C (Fig. 41), D (Fig. 43); 0.5 mm – D (Fig. 40).

Figs 51–54. Habitus: 51 – Anthelephila bukaba sp. nov., male, holotype; 52 – same species, female, paratype; 53 – A. kalabahi sp. nov., male, holotype; 54 – A. sunda sp. nov., male, holotype.