Lordomyrma emarginata, Taylor, Robert W., 2012

Taylor, Robert W., 2012, six new species from India, Viet Nam and the Philippines (Hymenoptera: Formicidae: Myrmicinae), Zootaxa 3282, pp. 45-60 : 55-56

Lordomyrma emarginata sp. n.

( Figs 25–28 )

Type locality: PHILIPPINES: LUZON: Mt Isarog National Park, Panicuason Village, Camarines Sur (13o 39 28.5’N, 123o 20 11.2’E)

Material examined: Known from the holotype (J. Caceres, 24-x-2006, ex leaf litter) and a single paratype, both workers, collected separately at the type-locality (J. Caceres, 23-ix-2006).

Type deposition: Holotype: UPLB. Paratype: MCZC.

Worker: A relatively distinctive species, as illustrated. Clypeus, antennae and head shape generally as in L. azumai . Antennal funiculus clavate but without delineation of a distinct segmentally defined club. Head relatively broad behind eyes (HW there almost as great as HW across eyes); vertexal margin in facial view shallowly but clearly concave. When viewed from behind (perpendicular to the vertex) the top and sides of the head merge bilaterally to form a tightly rounded angle of ca. 90o. Mesosoma compact, relatively short (WL:HL ratio = 1.27 versus 1.35 in L. azumai ); Promesonotum inflated and strongly elevated (APE approximating 45-50o versus ca. 25o in L. azumai - compare Figs. 2 , 22 ); humeri squared in dorsal view, but lacking nodules equivalent to those of L. azumai . Metanotal groove relatively weakly indented in lateral view, lacking an incised suture. Propodeal dorsum sloping strongly posteriad, outline in profile feebly concave; propodeal spines small, acute, squarely erect. Petiolar summit narrowly, sharply acutely transverse, the apex weakly emarginate in frontal view; minutely, obtusely bilaterally denticulate. Pre-gastral body surfaces almost entirely coarsely and more-or-less uniformly rugose, as illustrated, the rugal surfaces smooth and strongly reflective. Head ventrally smooth. Nucal collar finely roughly punctate. Propodeal declivity transversely striate. Gaster subopaque, generally shagreened with overlying fine netlike reticulum, strongest anteriorly. Mandibles finely longitudinally striate. Antennal scapes vaguely, very finely longitudinally striate-punctate. Anterior coxae coarsely, regularly transversely striate; middle and hind coxae with a few similar striae on their upper surfaces; legs otherwise sculptured like scapes. Pilosity as illustrated. Color generally dark, blackish-brown, the gaster more reddish. Antennae and legs lighter orange-brown. Dimensions: (holotype; paratype): TL 5.3, 5.2; HW 1.24, 1.20; HL 1.25, 1.22; CI 99, 98; EL 0.21, 0.21; OI 17, 18; SL 0.87, 0.85; SI 70, 71; PW 0.89, 0.88; WL 1.58, 1.58; DPW 0.42, 0.39; DPpW 0.0.46, 0.45; GW 1.39, 1.32.

Sympatric associations: Sympatric on Mt Isarog with L. diwata and L. idianale .

Etymology: Named for the emarginate transverse petiolar dorsum.

Figures

FIGURES 25 – 28. Lordomyrma emarginata, holotype worker, HW 1.24 mm, PW 0.89 mm, WL 1.58 mm, GW 1.39 mm.

FIGURES 1 – 4. Lordomyrma azumai, worker (Mt Takakuma, Kyushu), HW 0.79 mm, PW 0.61 mm, WL 1.17 mm, GW 1.19 mm.

FIGURES 21 – 24. Lordomyrma diwata, holotype worker, HW 0.74 mm, PW 0.54 mm, WL 0.96 mm, GW 0.73 mm.