Anthracites geniculatus Dohrn, 1905

Sabang, Aira Mae M., Bahoy, Daphne Cayle M., Grumo, Kim C., Gono, Alfredo Iii A., Salvador, Jewel Anne G., Rivera, Rodrin R., Nuñeza, Olga Macas, Robillard, Tony & Tan, Ming Kai, 2024, A taxonomic review on the katydids of the genus Anthracites Redtenbacher, 1891 (Tettigoniidae: Conocephalinae: Agraeciini) from Mindanao, Philippines, Zootaxa 5507 (2), pp. 313-336 : 320-321

Anthracites geniculatus Dohrn, 1905

( Figs 1B , 2B , 5 , 6 )

Anthracites geniculatus Dohrn, 1905: 241 — Kirby, 1906: 263; Karny, 1912: 25; Ingrisch, 2015: 79.

Material examined (images and description from Ingrisch, 2015). Holotype: • ♀; PHILIPPINES, Mindanao ; MZPW. Other: • 1 ♀; PHILIPPINES, Mindanao. Agusan, San Francisco, 10 km SE, [8°29'N, 125°59'E]; 13 November 1959; coll. L.W. Quate & C.M. Yoshimoto; ( BPBM).

New material examined. PHILIPPINES, Mindanao, Agusan del Sur: • 1♂; San Francisco, Mount Magdiwata ; N8.468, E125.973, 134 m. a.s.l.; 23 September 2022; coll. M. Salvador, J.A. Salvador, M. Astillo, J. Sabacajan, J.P. Sabacajan, E. Astillo III; 11JAS287, TRORT138-23 ( PNM) .

PHILIPPINES, Mindanao , Surigao del Sur: • 1♂; Cagwait, Barangay Mat-e ; 8°51’45”N, 126°17’56”E [N8.86250, E126.29889], 20 m. a.s.l.; coll. K.C. Grumo & A.A. Gono ( ZRC) • 1♀; San Miguel, Barangay San Roque ; 8°51’29”N, 126°0’1”E [N8.85806, E126.00028], 110 m. a.s.l.; 30 August 2023, 21h50; coll. K.C. Grumo & A.A. Gono ( ZRC) .

Remarks. Male previously unknown. Our female from San Miguel resembles the holotype, and the general colour patterns of the collected males from nearby also resemble the holotype.

Revised diagnosis. In addition to the diagnosis given in Ingrisch (2015): the male of this species is very similar to Anthracites furvuseques Tan, Baroga-Barbecho & Yap, 2018 from Siargao Island in the colour patterns on the legs and the cercus; but differs by the head and pronotum more red brown than black and the posterior femur dorsum not black, the cercus with the two internal teeth long and slender (instead of conical), subgenital plate black with dorsad-pointing lateral processes (instead of cream coloured and without the processes), and the shape of its titillators. The male is also very similar to Anthracites flagellatus from Misamis Oriental in colour patterns (as described in Ingrisch, 2015); but differs by the subgenital plate having triangular dorsad-pointing lateral processes with subobtuse apices (instead of spine-like with acute apices), and the shape of its titillators.

Redescription. Male habitus as shown in Figs 1B , 2B .

Head. Head and pronotum not different from female ( Figs 5A–C ).

Tegmina and wings. Tegmen micropterous, mirror area fully covered by pronotal disc ( Fig. 5A ), reaching middle of second abdominal tergite, with apex subtruncated; infumated, mostly cream-coloured with numerous black spots ( Figs 5A, 5B ).

Abdomen. Tenth abdominal tergite narrows posteriorly, at posterior margin truncated and bent ventrad, at middle emarginated and having setae ( Figs 5D, 5E ). Epiproct tongue shaped ( Fig. 5E ). Cercus very stout, rectangular, distinctly dorso-laterally compressed; externo-distal part slightly conical with apex obtuse; at apex with two inner processes pointing inwards in distal half; dorsal process long and slender, cylindrical but with basal half slightly broader and slightly curved inward, at apex forming small acute tooth; ventral process shorter, slightly surpassing middle of dorso-internal process, more cylindrical, slenderer, at apex subacute ( Figs 5D–G ). Subgenital plate longer than wide; with anterior margin concave; gently converging lateral margins; posterior margin narrow and deeply excised, posterior margin between bases of styli terminating into tube-shaped process and almost reaching apex of styli ( Fig. 5D ); margin around bases of styli on dorsal side swollen and with triangular internal tooth ( Fig. 5G ). Styli stout and long with apex rounded ( Figs 5D–G ). Titillators ( Fig. 6 ) separate, with two large and long lateral arms pointing posteriorly; lateral arm in dorsal and ventral views tapers into subacute apex, each with small stout ventral tooth with subacute apex; base typical of genus, at proximal end stout; stiffened along rim and provided with two pairs of lateral sclerites.

Measurements. See Table 1 .

Distribution. Agusan del Sur: San Francisco; Surigao del Sur [new locality record]: San Miguel and Cagwait.

Figures

FIGURE 1. Dorsal habitus of ♂ Anthracites alatus sp. nov. (A), Anthracites geniculatus Dohrn, 1905 (B), Anthracites pyramidalis Ingrisch, 2015 (C), Anthracites sebu sp. nov. (D) and Anthracites zebra Hebard, 1922 (E). Scale bars: 5 mm.

FIGURE 2 Lateral habitus of ♂ Anthracites alatus sp. nov. (A), Anthracites geniculatus Dohrn, 1905 (B), Anthracites pyramidalis Ingrisch, 2015 (C), Anthracites sebu sp. nov. (D) and Anthracites zebra Hebard, 1922 (E). Scale bars: 5 mm.

FIGURE 5. Anthracites geniculatus Dohrn, 1905 ♂: anterior half of body in dorsal (A) and lateral (B) views; face in anterior view (C); abdominal apex in dorsal (D), posterior (E), dorso-lateral (F) and dorso-posterior (G) views. Scale bars: 5 mm (A, B), 2 mm (C–G).

FIGURE 6. Anthracites geniculatus Dohrn, 1905 ♂ titillators in dorsal (A), dorso-distal (B, C), dorso-proximal (D), ventral (E), ventro-distal (F) and lateral (G) views. Scale bar: 1 mm.