Hemitrochostoma rutabulum, Redei, David & Jindra, Zdenek, 2015

Redei, David & Jindra, Zdenek, 2015, A revision of the genus Hemitrochostoma (Hemiptera, Heteroptera, Plataspidae), ZooKeys 495, pp. 63-77 : 70-73

Taxon classification Animalia Hemiptera Plataspidae

Hemitrochostoma rutabulum sp. n. Figs 1-4, 7-8, 14-15, 22-23, 32

Type material.

Holotype (male): "MALAYSIA - Perak \ Banjaran Bintang \ Maxwel Hill (Taiping) \ 18. - 19.2.1997 \ Ivo Jeniš”. Mounted on card, tarsus and apical half of tibia of right hind leg lacking, genitalia preserved in plastic microvial filled with glycerol pinned with the specimen, deposited in ZJCP. Paratype: same label as for holotype; intact (1 female, ZJCP).

Diagnosis.

Easily distinguished from the only known congener, Hemitrochostoma altilabris by the much more strongly dilated mandibular plates, particularly in the male (Fig. 7) but also in the female (Fig. 8), and the more produced anterior angles of the pronotum (surpassing anterior margins of eyes in both sexes) (Figs 7, 8). The ground colour of the two examined specimens is considerably darker than in Hemitrochostoma altilabris , and the scutellum is not marmorated with ochraceous along its lateral and posterior margin.

Description.

Macropterous male and female.

Colour and integument. Dorsum of body brown, following parts ochraceous: mandibular plates, clypeus and a confluent middorsal vitta running to base of head; explanate lateral margin, a pair of transverse submedian fasciae between collar and calli, weak suffusion at posterior margin of calli and on humeral tubercles, and an indistinct median vitta on disk of pronotum; visible portion of costal margin of fore wing; a pair of distinct or indistinct spots at basal tumescence, and a narrow vitta along midline starting slightly posteriad of basal tumescence and fading away before posterior margin of scutellum; legs ochraceous, antennae slightly darker, brownish ochraceous; venter of head brown, ventrally visible surfaces of mandibular plates and clypeus ochraceous, labium ochraceous, thoracic pleura (except explanate lateral portion of propleuron) and abdomen dark brown, lateral margin and an adjoining sublateral spot at anterior margin of each of ventrites III–VII ochraceous. Integument and vestiture as in the generic description.

Structure mainly as in generic description. Head with lateral margin of mandibular plates distinctly emarginate anteriad of eye (male, female), then strongly broadened, anteriormost portion rounded. Pronotum with anterolateral angles strongly produced anteriad, distinctly surpassing anterior margin of eye in both sexes but more strongly in male.

External male genitalia. Genital capsule (Figs 14-15) broadly rounded laterally. Paramere as in Figs 22-23. Phallus generally similar to that of Hemitrochostoma altilabris , it was not examined in detail.

Female terminalia (Fig. 32). Posterior margin of ventrite VIII more broadly emarginate than in Hemitrochostoma altilabris , proximal margin of valvifer VIII rather rounded; laterotergite IX distinctly broader than that of Hemitrochostoma altilabris . The single available female was not dissected.

Measurements (in mm) (holotype male / paratype female). Body length 6.6 / 6.6; median length of head to apex of clypeus 1.58 / 1.57, to apex of mandibular plates 2.00 / 1.84, greatest width (across mandibular plates subapically) 1.82 / 1.40, width across eyes 1.78 / 1.76, interocular distance 1.31 / 1.30, interocellar distance 0.64 / 0.66; oculo-ocellar distance 0.33 / 0.31, lengths of antennal segments I: IIa: IIb: III: IV as 0.74 / 0.63: 0.12 / 0.11: 0.82 / 0.78: 0.86 / 0.76: 1.01 / 0.90; median length of pronotum 1.40 / 1.76, humeral width 3.50 / 3.72; median length of scutellum 3.10 / 3.75, greatest width 3.66 / 4.25.

Etymology.

The specific epithet of the new species is the Latin noun rutabulum meaning 'shovel or spatula' (for cooking), referring to the broad, spade-like head of both sexes but particularly the male. Noun in apposition, not to be declined.

Distribution.

The species is known only from the type locality in Perak, Peninsular Malaysia (Fig. 33).

Bionomics.

Unknown.