Coridromius eremnos, Tatarnic and Gerasimos Cassis & Nsw & Nsw, 2013

Tatarnic, Nikolai J. & Cassis, Gerasimos, 2013, Description of eight new species of the traumatically inseminating plant bug genus Coridromius (Heteroptera: Miridae: Orthotylinae: Coridromini), European Journal of Taxonomy 35, pp. 1-24 : 5-7

Coridromius eremnos sp. nov.

Fig. 2 A-B

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Diagnosis

Recognized by the following combination of characters: body uniformly black with pale silvery hairlike setae; head black with yellow margins; antennae banded dark brown and pale yellow; proepimeron bilobed.

Etymology

Named for the Greek eremnos , meaning black.

Type material

Holotype

♀, MALAYSIA: Sabah, beaches 2 km NW of Kuala Penyu, 10 Aug. 1983, G. F. Hevel and W. E. Steiner ( AMNH_PBI 00191199 ) ( USNM).

Description

BODY LENGTH. ♀ (holotype): 1.68 mm.

COLOURATION ( Fig. 2 A-B). Almost entirely dark brown/black, with some white and pale yellow markings. Head: Black with pale yellow trim along inner ocular margin and posterior margin ( Fig. 2 A-B). Labium with first segment dark brown, the remainder orange-yellow. Antennae: AI dark brown with white apices, AII dark brown with narrow white medial annulation, AIII and AIV dark brown with white basal annulation ( Fig. 2A ). Thorax: Pronotal collar, pronotum, mesoscutum and scutellum uniform dark brown/black ( Fig. 2A ). Thoracic pleura dark brown/black. Anterior proepimeral lobe white, posterior lobe black. Evaporative area of metathoracic scent gland orange-yellow. Hemelytra: Uniform dark brown/black, membrane brown with dark brown veins. Abdomen: Dark brown/black. Legs: Pro- and mesofemora dark brown with apical ¼ orange-yellow, pro- and mesotibia orange-yellow with faint brown subbasal annulations, metatibia and metafemur uniform dark brown, metafemur without transverse banding. All tarsi yellow with claws brown.

SURFACE AND VESTITURE ( Fig. 2 A-B). Head, pronotum, thoracic pleura, scutellum, and hemelytra impunctate. Body clothed in long, white, decumbent setae [most setae knocked off the specimen].

HEAD. Approximately 5.6 x as wide as eye in anterior view ( Fig. 2B ). Frons strongly medially tumescent, merging with two minor swellings adjacent to eyes. Posterior margin of head rounded, weakly carinate. Antennae shorter and stouter than in other species, with AII slightly less than width of head (AII> than head width in others) ( Fig. 2A ).

THORAX. Pronotum broad and steep, posterior margin weakly convex, lateral and posterior margins weakly carinate, submarginal region of humeral angles excavate, calli obsolete ( Fig. 2A ). Proepimeron bilobed. Posterior margin of metepimeron truncate. Scutellum tumid ( Fig. 2A ).

HEMELYTRA. Margins of embolium weakly flared towards cuneus ( Fig. 2A ).

LEGS. Metatibial spines prominent.

ABDOMEN. Posterolateral margin of abdominal sternite II angular, weakly carinate and slightly flared.

MALE GENITALIA. Unknown.

FEMALE PARAGENITALIA. No obvious paragenital structures visible.

Host

No host plant data.

Distribution

Known only from Sabah.

Remarks

Only one other species, C. nigrus Carvalho, 1987 shares a nearly uniform black colouration. However, these species are readily separated by the proepimeron (unilobed in C. nigrus , bilobed in C. eremnos sp. nov.), and the female paragenitalia, which in C. nigrus is recognised by a well-defined swelling of the right abdominal laterotergites II and III, and the posterior margin of abdominal sternite II strongly carinate and flared to expose a putative copulatory opening.

Figures

Fig. 2. Photographs and scanning electron micrographs of Coridromius eremnos sp. nov. and C. fomangsu sp. nov. — A-B. Coridromius eremnos sp. nov. A. Dorsal habitus. B. Head and pronotum, anterior view. — C-F. Coridromius fomangsu sp. nov. C. Head and pronotum, anterior view. D. Dorsal habitus. E. Male genitalia, posterior view. F. Male genitalia, posteroventral view. LP = left paramere, MLS = mesal longitudinal suture of pygophore, RP = right paramere, VAP = ventral apical process of pygophore.