Xenocylapidius acutipennis Wolski & Gorczyca

Wolski, Andrzej & Gorczyca, Jacek, 2014, Revision of the plant bug genus Xenocylapidius (Hemiptera, Heteroptera, Miridae, Cylapinae), with descriptions of five new species from Australia and New Caledonia, ZooKeys 459, pp. 73-94 : 77

Taxon classification Animalia Hemiptera Miridae

Xenocylapidius acutipennis Wolski & Gorczyca sp. n. Figures 1, 9, 16-20, 31

Diagnosis.

Recognized by the dorsum mottled with brownish yellow (Fig. 1); the dark brown antennal segment II; the endosoma with two bundles of spiculi (SP1 and SP2); the medial sclerite (MS) long, weakly curved, tapering toward apex, sharply pointed; the sinistrolateral sclerite (SLS) large, occupying almost half of endosoma, strongly broadened basally, constricted medially; the clublike dextrolateral sclerite (DLS) (Fig. 16); and the right paramere sickle-shaped (Fig. 20).

Most similar to Xenocylapidius gemellus in sharing the brownish yellow mottling on dorsum (Figs 1, 5), the rounded extreme apex of apical process of left paramere when viewed dorsally (Figs 19, 35), and the sickle-shaped right paramere. This new species can, however, be distinguished by the dark brownish antennal segment and shape of the endosoma (Figs 16).

Description.

Male. COLORATION (Figs 1, 9). Dorsum mostly with mottled, brownish yellow coloration. Head. Vertex and frons mottled with dark brown and yellow; remainder of head dark red with yellow mottling; antennal segment I dirty yellow, with an indistinct, dark yellow tinge basally and with a reddish tinge occupying apical one third of inner surface; segment II dark brown; labium dark brown with indistinct, dirty yellow areas. Thorax.Pronotum. Collar yellow; calli dark brown, with broad, yellowish mottling; anterior margin weakly tinged with red medially; lateral margin and posterior lobe dark brown, tinged with red and dirty yellow; humeral angle and medial portion of posterior margin yellow. Mesoscutum and scutellum. Mostly reddish; mesoscutum weakly tinged with dark brown medially and with dirty yellow area bordering portion being depressed onto lateral margin; scutellum reddish with dirty yellow patch apically. Thoracic pleura. Proepimeron and proepisternum mostly dark brown with reddish areas; remaining pleura reddish, with indistinct yellowish areas. Hemelytron. Corium and clavus dark brown, mottled with yellow; cuneus dark brown, weakly tinged with red, inner angle yellow, apex with a small, dirty yellow patch; membrane fuscous with indistinct, dirty yellow areas. Legs. Procoxa dark brown, dirty yellow apically; meso- and metacoxae yellow; femora dirty yellow brown with reddish areas; tibiae dark brown; tarsi dirty yellow brown. Abdomen. Dark brown with large dirty yellow areas. STRUCTURE, TEXTURE, AND VESTITURE (Figs 1, 9). Head. Antennal segment II weakly broadened toward apex, covered with moderately dense, adpressed and semirecumbent setae, sparse on basal one-fifth of segment II and dense on remainder of segment. Thorax.Pronotum. Lateral margins sharply carinate, somewhat elevated. Mesoscutum and scutellum. Scutellum weakly convex. Hemelytron. Covered with short, relatively dense, adpressed, black setae.

Male genitalia.Aedeagus (Figs 16-17). Basal sac (BSC) occupying one third of endosoma; sclerotized portion of ductus seminis inside endosoma (DSS) ovoid; secondary gonopore nearly circular, not fully closed; basal fig (BP) irregular in shape; apex of endosoma with two bundles of spiculi (SP1 and SP2); medial sclerite (MS) long, weakly curved, tapering toward apex, sharply pointed; sinistrolateral sclerite (SLS) large, occupying almost half of endosoma, strongly broadened basally, constricted medially, and broadened, nearly cylindrical on apical half; dextrolateral sclerite (DLS) somewhat smaller than SLS, clublike. Left paramere (Figs 18-19). Apical process: lateral view: weakly tapering toward apex, obtuse apically; dorsal view: lateral margins weakly curved, extreme apex rounded; paramere body: dorsal view: weakly broadened toward apex; sensory lobe: massive, just slightly tapering toward apex, obtuse. Right paramere (Fig. 20). Sickle-shaped; apical process: long, thin, arcuate, just slightly narrowed toward apex; paramere body: thin, dorsal margin straight, ventral margin weakly arcuate.

Measurements.

♀/♂ (n=2, holotype measurements second). Body. Length 6.00/4.70, width 2.15/1.76. Head. Length 1.00/0.98, width 0.85/0.79, interocular distance 0.35/0.35. Antenna. Length of segment I 0.74/0.64, II 1.83/1.83 (III and IV missing in both specimens). Labium. Length of segment I 0.98/0.95 (II, III, and IV immeasurable in both specimens). Pronotum. Length 0.85/0.73, width of anterior margin 0.68/0.65, length of lateral margin 0.98/0.80, width of posterior margin 1.60/1.38.

Female. Similar to male in coloration, structure, texture, and vestiture.

Biology.

Unknown.

Distribution.

Australia (Queensland) (Fig. 31).

Etymology.

The specific name is derived from the Latin “acutus”, meaning sharpened, and is used to denote the sharply pointed mesial process (MS) of the endosoma.

Type material.

Holotype ♂: Malanda; Queensl[and] Mjöberg; Swedish Museum of Natural History Stockholm NHRS (NHRS); paratype 1 ♀: Glen Lamington Queensl[and] Mjöberg; Swedish Museum of Natural History Stockholm NHRS (NHRS).