Sundapyrochroa sumatrensis (Pic) Young, 2014

Young, Daniel K., 2014, Sundapyrochroa: A new genus of Fire-Colored Beetles (Coleoptera: Pyrochroidae: Pyrochroinae) from the Sunda Shelf, with a key to the three species, Insecta Mundi 2014 (341), pp. 1-18 : 8-10

Sundapyrochroa sumatrensis (Pic) , comb. nov.

( Figures 9–12 , 19–21 )

Sundapyrochroa sumatrensis (Pic)

Schizotus sumatrensis Pic, 1906

Schizotus rotundicollis Pic, 1912 , syn. nov.

Pyrochroa dimidiata Blair, 1912

Pseudopyrochroa dimidiata (Blair) ; Blair (1914)

Pseudopyrochroa sumatrensis (Pic) ; Blair (1914, 1928); Young (1996)

Male. (habitus, Fig. 9–10 ) Mean length from anterior margin of labrum (head slightly deflexed) to apex of elytra 9.4–13.5 mm (n = 5). Color variable: head, including mouthparts and antennae, thorax, abdomen, and legs usually rufopiceous to black ( Fig. 9 ); head, including mandibles, maxillae and labium, thorax, and legs, especially tarsi, may be yellowish-orange, at least in part ( Fig. 11 ); elytra most commonly yellowish-orange in basal 1/2 to 4/5, brownish-black to black apically, with the darker pigmentation typically advancing along the lateral and sutural margins.

Head. Cranium ( Fig. 11 ) lacking cranial pits, but with paired, very subtle gibbosities: one on either side of meson juxtaposed the anterior emarginations of compound eyes; cranial surface densely, shallowly punctate anteriorly, finely, sparsely punctate between eyes posterad antennal insertions, thence more coarsely and densely punctate on surface of cranial “neck.” Third antennomere with its ramus stout, well developed but clearly shorter than length of antennomere, itself.

Thorax. Pronotum ( Fig. 9–10 ) subquadrate, very slightly narrower anteriorly; anterior margin nearly straight; mesal canaliculus present. Elytral surface irregularly, coarsely, shallowly rugulose; vestiture consisting of dense, short setae, the color of which match the underlying elytral color; each elytron ribbed, bearing 4 costae.

Abdomen. Sternite 8 widest basally, apex ( Fig. 19 ) relatively shallowly emarginate mesally, bearing numerous, moderately elongate marginal setae.

Male abdominal terminalia. Tegmen ( Fig. 20 ) with basal piece subrectangular, its length nearly 2X its width, broadly joined to parameres distally. Parameres fused along basal 2/3, thence abruptly, widely separated, meson shallowly emarginate between diverging parameres at point of separation; parameres divergent, distally, each rounded apically. Median lobe ( Fig. 21 ) elongate, produced basally into two, elongate median struts, apex acutely narrowed.

Female. (habitus, Fig. 12 ) Similar to male. Mean length from anterior margin of labrum (head slightly deflexed) to apex of elytra 10.5–11.3 mm (n = 8). Antennae stout, antennomeres 3–10 notably pectinate, but rami much shorter and more stout than those of male; last abdominal sternite entire, broadly rounded.

Larva. Unknown.

Etymology. The species epithet, sumatrensis , combines the geographical location, the Indonesian island of Sumatra, with the Latin, - ensis, meaning “of” or “belonging to”. The epithet rotundicollis comes from the Latin, - rotund, meaning “round” and the Latin colli -, meaning “the neck”. This epithet refers to the distinctly rounded lateral aspects of the pronotum. Finally, dimidiata comes from the Latin dimidi -, meaning “half” or “to halve” - most likely in reference to the elytral color of some specimens (e.g., Fig 10 ).

Type Information. The type series for Schizotus rotundicollis Pic and Schizotus sumatrensis Pic were discussed by Young (1996) .

Specimens Examined. (5♂♂, 8♀♀): SYNTYPE ♀ [of dimidiata ]: [ Indonesia]: SUMATRA // SI-RAMBÉ // XII.90 - III.91 // E. MODIGLIANI; [2 nd label]: type [circular label with red boarder]; [3 rd label]: Pyrochroa // dimidiata // Blair // Type.; [4 th label]: 1912.136 ( BMNH); 1♀, [ Indonesia]: SUMATRA // SI-RAMBÉ // XII.90 - III.91 // E. MODIGLIANI; [2 nd label]: P. sumatrensis // Pic // K.G. Blair det.; [3 rd label]: 1912.136 ( BMNH); 1♀, SABAH: Mt. Kinabalu // Mesilau // 13.ii.1964. J. Smart. // Royal Soc. Exped. // B. M. 1964- 250 ( BMNH); 1♂, [ Malaysia]: BRITISH N. BORNEO // Tenompok // 15.II.1959; [2 nd label]: T. C. Maa // Collector // BISHOP ( BPBM); 1♂, [ Malaysia]: BRITISH N. BORNEO // Tenompok, 1460 m. // Jesselton, 48 km // E., 26-31.I.1959; [2 nd label]: T. C. Maa // Collector // BISHOP ( BPBM); 1♀, [ Malaysia]: BRIT- ISH N. BORNEO // Tenompok, 1460m. // Jesselton, 30 mi. // E., I - 26-31 - 1959; [2 nd label]: T. C. Maa // Collector ( DYCC); 1♂ [ Malaysia]: BRITISH N. BORNEO // Bundu Tukan // 18.II.1959; [2 nd label]: T. C. Maa // Collector // BISHOP ( DYCC); 1♂, [ Indonesia]: Takengon // Sumatra; [2 nd label]: NGS SI Exp // 1937 Mann ( DYCC); 1♀, [ Indonesia]: SUMATRA Utara // Brastagi, Gn Sibayak // 26. Jan.-1.Feb 2005 // 1600-2200m, Bolm lgt. ( DYCC); 1♀, [ Malaysia]: BORNEO: Sabah // Mt Kinabalu N.P. // Headquarters, 1558m // VIII/3-12/1988;[2 nd label]: Beating foliage // D.E. Bright // Collector ( NMNH); 1♂, MALAY- SIA: Sabah; // 1 km S. Kundasang // el. 1530m, 10 Sept. 1983 // G. F. Hevel & W. E. Steiner ( NMNH); LECTOTYPE ♀ [of sumatrensis ]: [ Indonesia]: [first card has dried glue only; perhaps once held distal part of left antenna]; [2 nd label]: Padang, // (Sumatra); [3 rd label]: sumatrensis // Pic; [4 th label]: communiqué // eu angleterre // d. Blair du // B. Museum; [5 th label]: type [handwritten]; [6 th label]: TYPE [red label]; [7 th label]: sumatrensis // Pic; [8 th label]: LECTOTYPE: // Schizotus // sumatrensis ♀ // Pic // Daniel K. Young ( MNHP); LECTOTYPE ♀ [of rotundicollis ]: [ Indonesia]: SUMATRA // SI-RAMBÉ // XII.90 - III.91 // E. MODIGLIANI; [2 nd label]: 348; [3 rd label]: type [handwritten]; [4 th label]: TYPE [red label]; [5 th label]: “ Schizotus ”// rotundicollis // Pic; [6 th label]: LECTOTYPE: ♀, Schizotus // rotundicollis // Pic // Daniel K. Young ( MNHP).

Distribution. To date, S. sumatrensis is the most widely distributed member of the genus, with records from Indonesia (Sumatra) and Malaysia (Borneo: Sabah). Elevations, where recorded, were 4672–4986 feet. Eleven of the 13 specimens have labels with specific phenological records; nine of these were collected between December and March, while one female was collected in early August and one male was collected on 10 September. These collection data might suggest at least a bivoltine, if not multivoltine developmental pattern for S. sumatrensis .

Diagnosis and Remarks. Like males of S. atricolor , those of S. sumatrensis have the ramus of antennomere three well developed, but clearly less than the length of the antennomere, itself. The ramus of the third antennomere in males of S. nigripennis is nearly three times as long as the entire length of the antennomere. The elytra of S. atricolor are black while those of S. sumatrensis are yellowish-orange in the basal third to four-fifths and black distally.

Figures

Figures 9-10. Sundapyrochroa sumatrensis (Pic), habitus adult male illustrating color variations.

Figures 11–12. Sundapyrochroa sumatrensis (Pic). 11) Head, adult male, dorsal. 12) Habitus, adult female, dorsal.

Figures 13–21. Three species of Sundapyrochroa. 13) S. atricolor (Pic), abdominal sternite eight. 14) S. atricolor (Pic), tegmen, dorsal. 15) S. atricolor (Pic), penis, dorsal. 16) S. nigripennis (Pic), abdominal sternite eight. 17) S. nigripennis (Pic), tegmen, dorsal. 18) S. nigripennis (Pic), penis, dorsal. 19) S. sumatrensis (Pic), abdominal sternite eight. 20) S. sumatrensis (Pic), tegmen, dorsal. 21) S. sumatrensis (Pic), penis, dorsal.