Coridromius nigrus Carvalho, 1987

Tatarnic, N. J. & Cassis, G., 2008, Revision Of The Plant Bug Genus Coridromius Signoret (Insecta: Heteroptera: Miridae), Bulletin of the American Museum of Natural History 2008 (315), pp. 1-95 : 73

Coridromius nigrus Carvalho Figures 5, 6, map 8

Coridromius nigrus Carvalho, 1987: 64–65 .

DIAGNOSIS: Recognized by its nearly uniform black coloration, long, triangular metepimeral lobe and distinctive paragenitalia. This species appears very similar to epithema and hermosus , both of which share similar paragenital structures, head shape and hemelytral shape, but differ in coloration.

REDESCRIPTION: COLORATION (figs. 5, 6): Nearly uniform reddish black. Head: Reddish black; mandibular plates and apex of clypeus tinted red; maxillary plate yellow; buccula and gena orange-brown; ocular margins and posterior margin of vertex yellow; labium yellow-orange, apex missing from specimen. Antenna: Grey-brown, AIII and AIV missing. Thorax: Pronotal collar black; pronotum reddish black, becoming more reddened laterally, posterior and lateral margins yellow-orange; mesoscutum and scutellum black with reddish tinting in basal and apical corners; thoracic pleura mainly reddish black, yellow-orange along posterior margins. Hemelytra: Reddish black, lighter laterally and apically; membrane dark grey. Abdomen: Reddish black. Legs: Coxae orange-brown; trochanters pale; pro- and mesofemora and tibiae reddish black; hind femur reddish black with faint black diagonal stripes; tarsi somewhat yellowed. SURFACE AND VESTITURE (figs. 5, 6): Impunctate, scutellum rugulose; head and dorsum with white, decumbent setae, most setae knocked off specimen. STRUCTURE (figs. 5, 6): Head: Wide; frons weakly tumescent medially; lateral tubercles adjacent to eyes small and ill-defined, bordered posteriorly by shallow depressions; posterior margin of vertex nearly flat. Thorax: Pronotum very broad, anterolateral angles weakly upturned, posterior and lateral margins carinate, submarginal region of humeral angles excavate, callar region undifferentiated; proepisternum unilobed; posterior margin of metepimeron extended in the form of a triangular lobe; metanotum not prominently flared. Hemelytra: Costal margin thin, flared out from base then abruptly angling medially at midpoint. Legs: Metatibial spines short and thin. Abdomen: Posterolateral margin of sternite II not angular. MALE GENITALIA: Male unknown. FEMALE PARAGENITALIA: Right laterotergites II and III swollen, desclerotized and medially depressed, posterior margin of right abdominal sternite II strongly carinate and flared outward (as in epithema and hermosus , figs. 11G–H, 13D–F).

HOST: Unknown.

DISTRIBUTION: Known from Wau, Morobe District, Papua New Guinea (map 8).

HOLOTYPE: Female: PAPUA NEW GUINEA: Morobe: Edie Creek, Wau , 7.31666 ° S 146.68333 ° E, 1700 m, 02 Apr 1966, J.L. Gressitt ( AMNH _ PBI 00042150 ) ( BPBM).