Coeligetoides trifurcatus, Bezděk, 2016

Bezděk, Jan, 2016, Revision of the genus Coeligetes from Malaysia and Indonesia, and description of Coeligetoides gen. nov. (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 4085 (4) : -

Coeligetoides trifurcatus BezdĚK, SP. nov.

( Figs 43–51 )

Type locality. Indonesia, East Kalimantan, 15 km N of Balikpapan, Sungai Wain Protection Forest , 01°08.1′S 116°49.9′E.

Type material. Holotype: ♂ (NMPC), “INDONESIA, E Kalimantan / ca. 15 km N of Balikpapan / Sungai Wain Protection Forest / 01°08.1 ' S, 116°49.9 ' E, 35 m / J. Hájek, J. Schneider & / P. Votruba leg. 8–11.xii.2011 [w, p] // primary rainforest; individual / collecting in stream, puddles and / swamp, on vegetation and dead / wood; light trap at border of forest [w, p]”. Paratypes: 1 ♂ (NMPC), same label data as in holotype; 1 ♀ (NMPC), “MALAYSIA, Perak / Cameron Highlands / Batu (= Mile) 19 vill. env. / 04°22.2 ' N, 101°20.0 ' E, 590 m / Jiří Hájek leg. 5.–15.v.2009 [w, p]”; 1 ♀ (JBCB), “MALAYSIA W, 2013 / KELANTAN, Kg. Tunku / Mt. Noring Timur, 1200 m / 150 km S of JELI, 21.ii. – / 14.iii., P. Čechovský leg. [w, p]”; 2 ♀ (JBCB), “MALAYSIA, prov. Johor / Tioman Isl. / jungle track 10–600 m a.s.l. / 15.– 29.3.2009, V. Hula [w, p]”; 1 ♂ (JBCB), “MALAYSIA, Pahang distr., / 30 km NE Raub, Lata Lembik / 3°56 ' N 101°38 ' E, 200–400 m, / 22.iv.–15.v.2002, / E. Jendek & O. Šauša leg. [w, p]”; 1 ♂ (NHMB), “MALAYSIA; Tioman; 400m; / Kampong Tekek—K. Juara / 9.iii.1998; 2,48N 104,11E / Dembický & Pacholátko leg. [w, p]”; 3 ♀ (NHMB), “W SUMATRA prov.; Kerinci / Seblat N. P.; 24km NE Tapan; / MUARA SAKO→E env.; / 2°05 ' S 101°15 ' E; 400–550m; / Dembický leg.; 4.–18.iii.2003 [w, p] // Collection / Naturhistorisches / Museum Basel [w, p]”; 2 ♀ (HNHM), “THAILAND, pr. Trang, / Kao Chong Nature / Wildlife Reserve / Center, rainforest, [w, p] // river Khao Chong, / swept & beaten, / 22.XI.2003, No. 14, / A. Orosz & Gy. Sziráki [w, p]”; 1 ♂ (BMNH), “59470 [w, h] // Doherty [w, p] // Borneo / Pengaron [w, p]”; 1 ♀ (ZMHB), “Dohrn / Sumatra / Liangagas [w, p] // 71514 [w, p] // Cotype [sic!] [o, p] // Coeligethes / unicolor / Jac [w, h]”; 1 ♂ 1 ♀ (BMNH), “Dohrn / Sumatra / Liangagas [w, p] // Jacoby Coll. / 1909-28 a. [w, p]”; 1 ♂ (MSNG), “Dohrn / Sumatra / Liangagas [w, p] // Coeligethes / unicolor Jacoby / det. M. Jacoby, 1899 [w, p] // MUSEO GENOVA / dedit Dr. Heinrich / Dohrn (Stettin), 1900 [w, p]”; 1 ♂ (MSNG), “Soekaranda / Januar 1894 / Dohrn [w, p] // Coeligethes / unicolor / Jac [w, h] // Coeligethes / unicolor Jacoby / det. M. Jacoby, 1899 [w, p] // MUSEO GENOVA / dedit Dr. Heinrich / Dohrn (Stettin), 1900 [w, p]”; 1 ♀ (BMNH), “Mt. Matang, / W. Sarawak. / G. E. Bryant. [p] / 20.XII.13 [w, h] // MSI [w, h] // G. Bryant Coll. / 1919-147 [w, p]”; 1 ♀ (BMNH), “PENINSULAR SIAM, / NAKON SRI TAMARAT / KHAO LUANG [p] / 1500–9000 [h] FT. [p] / March 20th [h] 1922. / H. M. PENDLEBURY [w, p] // Coeligetes / sp. [h] / Det. G. E. Bryant [w, p] // Ex F. M. S. / Museum. / B. M. 1955-354. [w, p]”; 1 ♀ (BMNH), “PENINSULAR SIAM, / NAKON SRI TAMARAT / KHAO LUANG [p] / 2000 [h] FT. [p] / March 25th [h] 1922. / H. M. PENDLEBURY [w, p] // Ex F. M. S. / Museum. / B. M. 1955-354. [w, p]”; 1 ♂ (BMNH), “PAHANG, F. M. S. / Lubok Tamang [p] / 3500 [h] ft. [p] / 10th [h] June, 1923 / H. M. Pendlebury. [w, p] // Ex F. M. S. / Museum. / B. M. 1955-354. [w, p]”; 1 ♂ 3 ♀ (UKM), “PERAK: Taiping / Bukit Larut / 20 Jun 1994 / Ismail, Ruslan, Yusof [w, p]”; 1 ♀ (UKM), “PERAK: Bukit / Larut / 21 Juiai 1994 / Salleh, Ismail & Ruslan [w, p]”; 1 ♂ (UKM), “PERAK: Taiping, / Bukit Larut / 13–15 Jun 91 / Ismail & Yusof [w, p] // GALERUCINAE [p] / Liroetis [h] / det. Mohamedsaid 199 [p] 3 [w, h]”; 1 ♀ (UKM), “PERAK: Taiping, / Bukit Larut / 13–15 Jun 91 / Ismail & Yusof [w, p]”; 1 ♀ (UKM), “PERAK: Bukit / Larut / 5 Ogos 1991 / Mohd Salleh [w, p]”; 1 ♀ (UKM), “PERAK: Bukit / Larut / 8–9 Mac 1990 / Ismail, Ruslan [w, p]”; 1 ♂ (UKM), “PERAK: Bukit / Larut [h] / 27 Mei 90 / Mohd Salleh [w, p]”; 1 ♀ (UKM), “TERENGGANU: / H. Lipur Sekayu / 24 Ogos 1994 / Ismail & Zabidi [w, p]”; 1 ♀ (UKM), “SELANGOR: Hutan / Rekrasi Sg. Sendat / 12 Okt. 91 / Ismail & Ruslan [w, p]”; 1 ♀ (UKM), “PAHANG: Pulau Tioman / 27–31 Ogos 91 / Yusof, J´din & Mahbob [w, p]”; 1 ♀ (UKM), “PAHANG: Cameron / Highlands / 4 April 1990 / Zaidi, Ismail, Ruslan [w, p]”; 1 ♂ (PRCS), “MALAYSIA, NW N Penang Island, / near Teluk Bahang vill., National Park / h~ 160m,N 05°27 ' 29'', E 100°11 ' 36'' / 18. II.2014 P. Romantsov leg. [w, p]”; 1 ♂ (PRCS), “MALAYSIA, N Borneo, Sabah, / Keningau dist., Trus Madi Mt., / h~ 1250m, N 05°26 ' 35'', E 116°27 ' 5'' / 28.II.2014 P. Romantsov leg. [w, p]”; 1 ♀ (BMNH), “BRUNEI: x-1992 / Temburong District / Ridge NE of Kuala / Belagong, 300m. [w, p] // 125W MV Light Trap / J H Martin coll. / BMNH(E) 1992-172 [w, p]”. The specimens are provided with one additional printed red label: “HOLOTYPUS, [or PARATYPUS, respectively], / Coeligetoides g. nov. / trifurcatus sp. nov., / J. Bezděk det., 2015”.

Description. Measurements. Males: 7.7–9.5 mm (holotype 8.4 mm), females: 8.0– 11.7 mm.

Body almost completely yellowish brown, except black apices of mandibles and slightly infuscate tibiae and tarsi.

Male (holotype, Fig. 43 ). Labrum transverse, with widely rounded anterior angles and shallowly concave anterior margin, surface with 8 setae in transverse row. Anterior part of head lustrous, flat, slightly uneven, posterior tip relatively wide, surface covered with several large punctures, and with several long pale setae along anterior margin and laterally along antennal insertions. Interantennal space wide, 1.70 times as wide as transverse diameter of antennal socket. Eyes large, interocular space 1.30 times as wide as transverse diameter of eye. Frontal tubercles subpentagonal, transverse, with anterior tips divergent, surface covered with several larger punctures, lustrous. Vertex distinctly impressed behind frontal tubercles, surface covered with distinct punctures and short pale setae, medially with narrow impressed line. Antennae filiform, 0.91 times as long as body, length ratio of antennomeres equals 13-5-12-17-17 -17-18-17-17-16-19.

Pronotum lustrous, transverse, 1.85 times as broad as long, widest in middle, covered with double fine punctation: very dense fine micropunctures and moderately dense larger punctures. Anterior margin slightly concave, lateral margins moderately rounded (in posterior half nearly parallel, in anterior half convergently rounded), posterior margin widely rounded. Anterior margin with indistinct border, posterior margin moderately bordered. Lateral margins with wider channel-like margins. All angles obtusangulate, anterior ones distinctly swollen, all angles with setigerous pore bearing long pale seta, additional four to five setae placed on lateral margins. Scutellum with very widely rounded tip.

Elytra long 1.85 times as long as wide and 0.75 times as long as body, almost glabrous, with several short setae visible on lateral and apical slopes, covered with dense confused punctures. Humeral calli well developed. Epipleura wide basally, gradually narrowing posteriorly and disappearing before apex.

Posterior margin of anterior coxal cavities open. Last ventrite short, with two short, wide, V-shaped incisions, median lobe wide with elongate oval impression, penultimate ventrite with small semicircular incision in middle of posterior margin ( Fig. 47 ). Protarsomeres I and II narrow, protarsomere I elongate subtriangular, twice as long as wide, length ratio of protarsomeres I–IV equals 8-6-6-9. Metatarsomere I long and narrow, length ratio of metatarsomeres I–IV equals 14-7-6-10. Claws bifid, inner teeth shorter than outer ones ( Fig. 46 ).

Aedeagus small, flat, apex with short sharp incision, in lateral view apical part bent downwards. Dorsal process with two branches: ventral, slightly wider, directed obliquely upwards, and dorsal, slightly narrower, widely bent, with apical third bifurcate ( Fig. 45 ).

Female ( Fig. 44 ). Interantennal space wider, 2.20 times as wide as transverse diameter of antennal socket. Eyes smaller, interocular space wider, 1.85 times as wide as transverse diameter of eye. Antennae shorter than in male, 0.65 times as long as body. Last ventrite with entire regularly rounded posterior margin ( Fig. 48 ). Pygidium with posterior margin widely concave, tergite VIII with posterior margin widely shallowly concave ( Fig. 49 ). Sternite VIII transversely rhomboid, with V-shaped incision in middle of posterior margin, with short pale setae cummulated along posterior margin except middle part, tignum twice longer than sternite VIII ( Fig. 51 ). Vaginal sclerite missing. Spermatheca with poorly delimited nodulus ( Fig. 50 ).

Variability. Outer margin of tibiae usually darkened, tarsi rarely infuscate, rarely legs completely yellow or tibiae completely infuscate.

Differential diagnosis. Coeligetoides trifurcatus sp. nov. is habitually similar to dorsally pale Coeligetes species ( C. unicolor and C. howardi sp. nov.). Most of specimens of Coeligetoides trifurcatus sp. nov. can be distinguished by the darkened tibiae which are always pale in both similar Coeligetes species. Additional differencies duplicate the generic characters: Coeligetoides trifurcatus sp. nov. has posterior margin of anterior coxal cavities open (closed in Coeligetes ), aedeagus is wide and flat with dorsal process thin and trifurcate, anterior part of head is flat with wide posterior tip (elevated and convex with posterior tip narrower in Coeligetes ), claws bifid (claws appendiculate in Coeligetes ), labrum with shallowly concave anterior margin (rounded or nearly straight in Coeligetes ), female last ventrite with entire and regularly rounded posterior margin (incised in Coeligetes ), vaginal sclerite absent (present in Coeligetes ), spermatheca with poorly delimited nodulus (nodulus well developed in Coeligetes ).

Distribution. Malaysia (Peninsular Malaysia, Sabah, Sarawak), Brunei, Indonesia (Sumatra, Kalimantan), Thailand.

Etymology. Trifurcatus (= trident) refers to the unusual shape of the dorsal process of the aedeagus, bearing three branches.

Figures

FIGURES 43 – 44. Habitus of Coeligetoides gen. nov. 43 — C. trifurcatus sp. nov. (holotype, male, 8.4 mm); 44 — C. trifurcatus sp. nov. (paratype, female, 10.7 mm).

FIGURES 45 – 51. Details of Coeligetoides trifurcatus sp. nov. 45 — aedeagus (dorsal, lateral and ventral views); 46 — claws; 47 — last two abdominal ventrites of male; 48 — female last abdominal ventrite; 49 — female pygidium and tergite VIII; 50 — spermatheca; 51 — sternite VIII and tignum. Scale bars: 0.25 mm for Fig. 46, 0.5 mm for Figs 45, 50 and 51, 1 mm for Figs 47 – 49.