Pentamyrmex, Rider, David A. & Brailovsky, Harry, 2014

Rider, David A. & Brailovsky, Harry, 2014, Pentamyrmexini, a new tribe for Pentamyrmex spinosus, a remarkable new genus and species of Pentatomidae (Hemiptera: Heteroptera) from Thailand, Zootaxa 3895 (4), pp. 595-600 : 596

Pentamyrmex , new genus

Description. Overall color black with a few white markings; elongate, cylindrical in shape, armed with various projecting spines ( Figs. 1 , 5 ). Distinctly antlike in shape. Dorsal surface of head, pronotum, and scutellum densely and coarsely punctate; corium very finely, shallowly punctate, punctures of medium size and stature on venter. Head declivant, not quite vertical ( Figs 1, 2 ), subtriangular in shape, eyes somewhat pedunculate ( Fig. 3 ). Juga acute apically, distinctly longer than tylus, but not meeting anteriorly, leaving gap anterior to tylus ( Fig. 3 ). Dorsal surface of head densely punctate; ocelli relatively small, remote from compound eyes ( Fig. 3 ). Antennal segment I relatively short, not reaching apex of head, each antennifer provided with robust spine laterally. Bucculae relatively wide, distinctly lobed posteriorly, rostral segment I not reaching beyond posterior margins of bucculae.

Pronotum transversely constricted in middle, anterior portion slightly longer along midline than posterior portion ( Figs. 1 , 5 ); pronotal calli obsolete. Scutellum triangular, relatively long and slender, with a spine near each basal angle, and another near apex, anterior disc somewhat bulbous ( Fig. 6 ). Hemelytra somewhat constricted anteriorly, wider apically, each clavus continuing as narrow sclerite beyond apex of scutellum and there meeting with each other ( Fig. 5 ); juncture between corium and hemelytral membrane indistinct, membrane with 5-6 weak longitudinal veins ( Fig. 5 ). Ostiolar peritreme relatively small, auriculate, evaporative area relatively small. Inferior surface of femora armed with 1-3 small teeth, superior surface armed with a single distal spine, distinctly larger on hind femora ( Fig. 5 ); hind tibiae distinctly curved ( Fig. 1 ); tarsi 3-segmented.

Abdomen relatively large, globose; connexival segments unarmed, except posterolateral angle of segment 5 (4th visible) spinose, and that of segment 6 (5th visible) obtusely toothed. Spiracles very small; trichobothria longitudinal (or at a slight angle), situated very close to each other. External female genitalia typical of the Pentatomidae , basal plates relatively large, 8th paratergites subvertical ( Fig. 4 ).

Etymology. Penta- refers to the five segmented antennae typical of most pentatomid genera; -myrmex refers to the remarkable antlike appearance of this genus.

Figures

FIGURES 1 - 4. Pentamyrmex spinosus n. sp.: 1, Body, dorsal view; 2, Body, lateral view; 3, Head, anterodorsal view; 4, Female genital plates, posterodorsal view.

FIGURES 5 - 6. Pentamyrmex spinosus n. sp.: 5, Body, dorsal view; 6, Scutellum, lateral view.