Coridromius bicolor, Tatarnic & Cassis, 2008

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 : 27-31

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Coridromius bicolor

new species

Coridromius bicolor , new species Figures 4, 6, 7A–C, 8A, map 1

HOLOTYPE: Male: VANUATU: Shefa: Shepherd Group: Tongariki Island , 16.8 ° S 168.5 ° E, 0–300 m, 29 Aug 1979, W.C. GoogleMaps

Gagne, Macaranga sp. ( Euphorbiaceae ) ( AMNH _PBI 00041470) ( BPBM type # 16724) ( BPBM).

DIAGNOSIS: Recognized by the following characters: flat and broad shape (fig. 4); posterior margin of pygophore with shallow folded groove to left (fig. 8A); short left paramere (figs. 7A, 8A); small, triangular right paramere with rounded apex (fig. 7B– C); most specimens dark brown with the anterior half of the hemelytra pale. C. bicolor is similar in appearance to variegatus , chenopoderis , monotocopsis , and pilbarensis but is noticeably wider across the hemelytra, has a slightly flatter pronotum, different coloration, and a unique right paramere shape.

DESCRIPTION: COLORATION (figs. 4, 6): Orange-brown to dark chocolate brown. Head: Mostly yellow- to orange-brown; frons with dark brown vittae; paired transverse depressions and midpoint of vertex dark brown, in some cases these markings join together as a single band; vertex sometimes with yellow piping along posterior margin; clypeus with two submedial, vertical brown stripes; mandibular and maxillary plates yellow to orange, buccula brown to orange with yellow ventral margin; labrum dark brown, labium orange-brown, brown apically. Antennae: AI yellow, apex sometimes with faint brown ring; AII mostly pale with dark brown annulation; AIII and AIV dark brown. Thorax: Pronotal collar yellow, anterior margin brown; pronotum orangebrown to dark brown with faint medial stripe, callar region sometimes mottled with faint, coalescing brown spots, anterolateral corners and humeral angles generally paler; mesoscutum yellow- to orange-brown; scutellum yellow- or orange-brown to dark brown, sometimes with a faint brown medial stripe, apex generally cream colored; thoracic pleura yellow- or orange-brown with posterior margins of each sclerite yellowed. Hemelytra: Mostly dark brown with the anterior half of the hemelytra sometimes pale, or mostly yellow to orange-brown with claval commissure dark brown and corium with faint symmetrical dark markings; the clavus always darker, sometimes somewhat reddened at costal fracture and apex of cuneus. Legs: Yellow-orange; metafemur with 7–8 diagonal brown stripes. Abdomen: yellow to brown. SURFACE AND VESTITURE (figs. 4, 6): Head and pronotum shallowly punctate; propleuron, metepimeron, scutellum and hemelytra impunctate; dorsum with sparse distribution of short, white, decumbent setae. STRUCTURE: (figs. 4, 6) Head: Frons broadly tumescent medially; vertex with two slightly raised tubercles adjacent to eyes, bordered posteriorly by shallow depressions, posterior margin somewhat carinate, slightly rounded. Thorax: Pronotum very broad, weakly convex, margins carinate; anterolateral margins only weakly upturned, submarginal region of humeral angles weakly excavate, callar region undifferentiated; proepisternum unilobed; posterior margin of metepimeron truncate; metanotum not prominent and flared. Hemelytra: Costal margin thin and platelike, flared along entire length and weakly sinuate. Legs: Metatibial spines thin and short. Abdomen: When

viewed laterally, posterior margin of abdominal sternite II not sharply angular. MALE GENITALIA (figs. 7A–C, 8A): Right paramere somewhat triangular, curved, and rounded (fig. 7B–C); left paramere sickleshaped, with a broad gutter on inner surface (figs. 7A; 8A); posterior margin of pygophore with shallow groove on left formed by folding of the pygophore margin (fig. 8A). FEMALE PARAGENITALIA: No visible external paragenitalia.

ETYMOLOGY: Named for the coloration typical of most specimens.

HOST: This species has been collected on Macaranga and Mallotus spp. ( Euphorbiaceae ), as well as from mango blossoms (Anacaridaceae).

DISTRIBUTION: Known only from Vanuatu (map 1).

PARATYPES: VANUATU: Shefa: Shepherd Group: Tongariki Island, 16.8 ° S 168.5 ° E, 0– 300 m, 29 Aug 1979, W.C. Gagne, Macaranga sp. ( Euphorbiaceae ), 23 (AMNH_PBI 00041471, AMNH_PBI 00041472), 2♀ (AMNH_PBI 00041473, AMNH_PBI 00041474) (BPBM). Torba: Banks Islands: Vanoua Lava Island, 2 km W of Sola, 13.83333 ° S 167.4667 ° E, 0–30 m, 17 Sep 1979, G.A. Samuelson, Mallotus sp. ( Euphorbiaceae ), 63 (AMNH_ PBI 00042134–AMNH_PBI 00042139), 1♀ (AMNH_PBI 00041475) (BPBM).

OTHER SPECIMENS EXAMINED: VA- NUATU: Shefa: Shepherd Group: Tongariki Island, 16.8 ° S 168.5 ° E, 0–300 m, 29 Aug 1979, W.C. Gagne, Mangifera sp. ( Anacardiaceae ), 2 nymphs (AMNH_PBI 00042140, AMNH_PBI 00042141) (BPBM).


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