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: 17-19
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Coridromius tafo sp. nov.
Fig. 6View Fig A-C
Distinguished by the following combination of characters: pronotum with anterior margin steeply declivent and posterior margin cleft, left paramere evenly curved, gutter of left paramere nearly enclosed its entire length, and ventral apical process of pygophore broad.
Named after Tafo, the type locality.
♂, GHANA: Ashanti, Tafo , 6.7333° N – 1.6167° W, 278 m, 1 Oct. 1965, D. Leston ( AMNH_PBI 00192803) ( BMNH).GoogleMaps
BODY LENGTH. ♂ (holotype): 1.71.
COLOURATION ( Fig. 6View Fig A-B). Mostly orange-brown with yellow-brown markings. Head: Concolourous brown, frons without vittae, medial margin of eyes and posterior margin of head with faint yellow piping, clypeus darker brown ( Fig. 6BView Fig). Antennae: AI brown, apically yellow, AII basal half pale orange-brown, apical club dark brown with narrow while annulation at base, AIII and AIV dark brown, basally pale ( Fig. 6AView Fig). Thorax: mostly orange-brown. Pronotum orange-brown, slightly paler apically, with faint pale midline stripe ( Fig. 6View Fig A-B). Scutellum orange-brown with pale apical fascia ( Fig. 6AView Fig). Thoracic pleura orange brown, apices of proepimeron pale, mesepisternum darker ventrally, metathoracic scent gland peritreme pale. Hemelytra: brown, slightly paler towards costal margin, cream coloured at cuneal fracture ( Fig. 6AView Fig). Cuneus with large, irregular dark brown marking, laterally with faint reddish flecking, apically pale, membrane brown. Abdomen: orange-brown, with small, very faint darker brown markings along dorsolateral margin. Legs: coxae dark brown, apically pale. Pro- and mesofemora brown, somewhat paler apically, metafemur with dark brown banding on lateral surface, fusing dorsally, subapically with pale mark dorsally, subapical bothria pale; tibiae yellow to pale orange brown, with irregular dark brown subbasal annulation.
SURFACE AND VESTITURE ( Fig. 6View Fig A-B). Head with a few irregular punctures medially on vertex. Pronotum, scutellum, and propleuron punctate, hemelytron with punctures basally, becoming smooth on corium
( Fig. 6AView Fig). Body with sparse coating of short, thin, hairlike setae. Head with sparse coating of very short adpressed setae, gena with a few longer semierect setae.Antennae clothed in semi-erect setae interspersed with more erect, thin spinelike setae ( Fig. 6AView Fig). Pronotum with sparse distribution of very short, reclining setae; hemelytra with sparse distribution of short, semi-reclining setae ( Fig. 6AView Fig). Thoracic pleura with a few hairlike setae, abdomen with slightly more dense coating of longer, semi-erect setae. Femora with semi-erect setae, metafemoral apical bothrial setae long. Tibiae with semi-erect setae, metatibia with two rows of thick, caudally directed spines.
HEAD. Approximately 5.8 x as wide as eye ( Fig. 6BView Fig) in anterior view. Frons weakly tumescent; vertex with transverse depressions adjacent to eyes, posterior margin broadly medially rounded, not carinate ( Fig. 6BView Fig). Buccula swollen.
ANTENNAE. AII basally thin, apically clavate.
THORAX. Pronotal collar broad and rounded ( Fig. 6BView Fig). Pronotum broad, broadly tumescent medially, anterior margin steeply declivent, callosite region undifferentiated, posterior of humeral angles distinctly depressed, posterior margin carinate and medially concave ( Fig. 6View Fig A-B). Proepimeron bilobed. Posterior margin of metepimeron truncate. Surface of scutellum flat, apex broadly rounded ( Fig. 6AView Fig).
HEMELYTRA. Costal margin thinly carinate, weakly flared posteriorly ( Fig. 6AView Fig).
ABDOMEN. When viewed laterally, posterior margin of abdominal sternite II not distinctly angular.
MALE GENITALIA. Posterior margin of pygophore with broad, fingerlike ventral apical apophysis, mesal longitudinal suture long ( Fig. 6CView Fig). Left paramere shorter than in many other species (~2 x right paramere length), extremely thin and evenly curved, gutter enclosing aedeagus nearly enclosed its entire length, right paramere broad and subtriangular ( Fig. 6CView Fig).
FEMALE PARAGENITALIA. Unknown.
No host records.
Known only from Tafo, Ghana.
In 1974, Linnavuori described C. schuhi from a single specimen collected on Mount Tonkoui, Ivory Coast ( Linnavuori 1994). Unfortunately, the sole specimen of this species appears to have been lost ( Tatarnic & Cassis 2008), and its description lacks sufficient detail to determine whether or not it is conspecific with C. tafo sp. nov. Though the described colouration of C. schuhi differs from that of the sole specimen of C. tafo sp. nov. (the former being much darker), other species of Coridromius are highly variable in their colouring (e.g., C. chenopoderis Tatarnic & Cassis, 2008 ; C. zetteli Chérot, Konstantinov & Yasunaga, 2004 : see Tatarnic & Cassis 2010), and without a larger sample size we cannot ascertain the degree of colour variation across these species. We therefore take the conservative approach in designating C. tafo sp. nov. a distinct species.
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