Eurhopalothrix jennya Taylor, 1990

Satria, R. & Jannatan, R., 2021, Dealate queens of the ant genus Eurhopalothrix Brown et Kempf, 1961 (Hymenoptera: Formicidae: Myrmicinae) from Sumatra, Far Eastern Entomologist 430, pp. 11-16 : 14-15

Eurhopalothrix jennya Taylor, 1990

Figs 6–9

MATERIAL EXAMINED. Indonesia: West Sumatra, Padang, Pauh, Limau Manis,

Sarasah Uwak Waterfall, 0°54'47.7"S, 100°28'54.8"E, near the waterfall and disturbed forest, 6.II 2021, colony code RS 6ii2021 - SU6 , 1 dealate gyne and 7 workers, leg. R. Satria .

petiole and postpetiole in dorsal view.

REDESCRIPTION OF DEALATE QUEEN. In general appearance, queen is similar to worker, for worker description see Taylor (1990). Head in full-face view subtriangular, slightly longer than broad, with posterior and posterolateral margins almost straight ( Fig. 6 ); ocelli present; distance between lateral ocelli longer than distance between lateral and median ocelli, and four times as long as major axis of median ocellus; ocelli in lateral view slightly protruded dorsad; eye large, with about 60 ommatidia; clypeus in full-face view broader than long, with anterior margin slightly concave; frontal carina bordering deep antennal scrobe below eye, allowing total reception of antenna; antenna 7-segmented; antennal scape expanded anterad; mandible triangular; masticatory margin with 11 teeth. Mesosoma with main sclerites associated with wing function ( Figs 7, 9 ), in dorsal view short and stout; anterodorsal slope of pronotum in lateral view steep; anterodorsal outline of mesoscutum in lateral view relatively gentle; propodeal spiracle conspicuous.

Body entirely densely foveolate. Dorsum of head, posterodorsal surface of pronotum,

mesoscutum, dorsum of postpetiole, first gastral tergite, antennal scape, and all legs covered by a ground pilosity of minute scattered hairs, detail description of these hairs given by Taylor

(1990). Head in full-face view, with six standing setae on vertex of head ( Fig. 6 ), four on middle near ocelli, and one seta behind each eyes; antennal scape with two-row of setae at outer edge, first row directly on corner with seven thick and long setae getting shorter distally;

second row with five smaller setae getting larger distally; antennal segments covered with fine simple hairs; posteromedian of pronotum with two standing setae; antero-lateral of pronotum with eight hairs on each sides, vary in size and getting larger distally; mesoscutum with eight of standing setae, with two pairs relatively short and slender on disc of mesoscutum,

and two pairs as thick as setae on vertex in posterolateral and posterodorsal of mesoscutum respectively; mesoscutellum, petiole and postpetiole with two standing setae as thick as setae on vertex ( Figs 7–9 ); first gastral tergum with 14 standing setae; second and third tergite with five standing setae, second and third sternite with six standing setae. For color pattern, see

Figs 6–9 ; body dark reddish-brown, antennal flagellum yellowish.

MEASUREMENTS (dealate queen). HL 0.75 mm, HW 0.80 mm, EY 0.06 mm, SL 0.40

mm, SeL 0.07 mm, DSe 0.21 mm, WL 0.84 mm, PW 0.59 mm, PSD 0.03 mm,PeL 0.37 mm,

PeW 0.29 mm, PPL 0.27 mm, PPW 0.51 mm, CI 106.

REMARKS. The queen of Eurhopalothrix jennya was described by Taylor (1990), and he mentions that “12 hairs are scattered on the first gastral tergum, loosely arranged in 4

longitudinal rows”. Interestingly, the Sumatran specimen has 14 thick setae on the first gastral tergite with 12 arranged in four longitudinal rows, and two setae on each of the posterolateral sides of the first gastral tergite. We assumed that probably the paratype queens of E. jennya were worn out during preserving the specimens.

DISTRIBUTION. Indonesia: Sumatra (new record); Malaysia: Borneo (Sarawak:

Kampong Segu and Gunung Mulu National Park) (Taylor, 1990; Mezger & Pfeiffer, 2010;

Pfeiffer et al., 2015; Janicki et al., 2016).

Figures

Figs 6–9. Dealate gyne of Eurhopalothrix jennya (colony: RS6ii2021-SU6, individual: RS13ii2021A). 6 – head in full-face view; 7 – body in lateral view; 8 – eye; 9 – mesosoma,