Mariomella singularis, Faúndez & Rider, 2019

Faúndez, Eduardo I. & Rider, David A., 2019, A new genus and new species of Aeptini (Hemiptera: Heteroptera: Pentatomidae: Pentatominae) from Australia, Zootaxa 4658 (1), pp. 189-192 : 190-192

Mariomella singularis sp. nov.

( Fig. 1 )

Description: General body features: body elongate, acute, ochraceous in coloration.

Head: Elongate, longer than wide, dull cream colored, with dense, dark to concolorous punctation. Eyes prominent, reddish. Ocelli small, circular, located near base of head, behind imaginary line drawn through the posterior margins of compound eyes, but not contiguous with pronotum. Paraclypei enlarged, punctate, apices rounded. Lateral margins of head nearly straight for basal two-thirds, then curving mesad for apical third, gradually narrowing in front of the eyes. Antennae dull cream colored at base, becoming orange to dark reddish apically, first antennomere not extending beyond apex of head, third antennomere very short, antennomeres 4 and 5 elongate, subequal. Rostrum reaching metacoxae.

Thorax: Pronotum trapezoidal, dull cream colored with dense punctation, anterior disk slightly darkened, with a longitudinal, weak stripe medially; cicatrices with black patches on lateral margins. Anterolateral pronotal margins straight, with a spine like projection at each anterior angle; humeral angles rounded. Scutellum triangular, dull cream colored with concolorous, dense punctures, basal lateral foveae very dark and conspicuous; scutellar apex rounded. Coria dull cream colored with dense, dark punctation; hemelytral membranes smoky with longitudinal veins conspicuous. Thoracic sterna yellowish with light brown dense punctures, a brownish stripe on each side marginally. Tooth associated with prosternal sulcus poorly developed, rounded. Metapleura dull cream colored with dark, dense punctation. Ostiolar peritremes short, each not reaching halfway to lateral margin of metapleuron; evaporatoria relatively small, restricted to a very small rugose area around each ostiolar peritreme; metapleuron external third densely punctured. Legs yellow, with strong, dark setae, tibiae cylindrical, superior surfaces not sulcate.

Abdomen: yellowish dorsally; connexiva dull, cream colored, rounded; venter dull, cream colored, with dense, concolorous punctures, with dark stripes on the sides along the spiracles. Spiracles dark brown, not placed on distinct callus. Female genitalia: Paratergites 8 apically rounded and fused as a single structure, paraterguites 9 ovate with rounded apex, first and second gonocoxae apically sharp, convex posteriorly, mesial margins straight ( Fig. 1 B ). Male genitalia: Pygophore with truncate excavation ventrally, dorsally with two triangular processes on each side ( Fig. 1 C ). Parameres, each with a basal and proximal lobe, basal lobe with strong teeth on upper surface and two smaller teeth on inner margin ( Fig. 1 E ).

Measurements (Female n=1, followed by males in parenthesis n=4): Total length: 7.90 (7.50), pronotal width: 4.08 (3.90), head length: 1.73 (1.76), head width: 1.77 (1.69), scutellum length: 2.96 (2.96), scutellum width: 2.48 (2.50), rostral segments: I: 1.22 (1.20) II: 0.92 (0.89) III: 0.44 (0.46) V: 0.49 (0.50), antennal segments: I: 0.59 (0.57) II: 1.29 (1.26) III: 0.78 (0.74), IV: 0.44 (0.43).

Type material: Holotype: Australia, Western Australia, Drummond , 16-XI-1973, N. McFarland leg. 1♂ ( USNM) . Paratypes: Same as holotype 4♂♂ 1♀ ( USNM, DARC, EIFC, QMBA) .

Etymology: Singularis, from the latin = unique, or singular; to signify the uniqueness of this new species among the Aeptini and other pentatomoids. This species belongs to New genus 1 new species 1 in Faúndez (2017) dissertation.

Distribution: Australia: Western Australia.

Figures

FIGURE 1. Mariomella singularis gen. et sp. nov. A. Habitus (Scale = 1mm); B. External female genitalia, ventral view (Scale = 1mm); C. Male pygophore, dorsal view (Scale = 0.5 mm); D. Tibia (Scale = 1.5 mm); E. Male paramere lateral view (Scale = 0.1mm); F. Metapleuron (Scale = 0.7mm).