Corethrella (Corethrella) manaosensis (Lane and Cerqueira)

Published, First, 2008, The Frog-Biting Midges of the World (Corethrellidae: Diptera), Zootaxa 1804, pp. 1-456 : 69-71

Corethrella (Corethrella) manaosensis (Lane and Cerqueira)

Lutzomiops manaosensis Lane and Cerqueira 1958:565 . Type locality: Manaus, Amazonas, Brazil. Holotype ♂ (DEFS). Corethrella manaosensis: Borkent 1993:11 .

DIAGNOSIS: Male and female adults: only extant species of Corethrella with a plain wing (Figs. 61M, 67I), with most of the thorax light brown but with the lateral vitta dark brown and the legs nearly uniformly light brown but with the very base of the midfemur and about the basal half of the hind femur pale ( Fig. 42B).

DESCRIPTION: Male adult. Descriptive statistics: see Tables 2–5. Head: Outline in anterior view laterally elongate (as in Fig. 7E). Four large setae on frons between ventromedial area of ommatida (as in Fig. 16D). Antenna unknown. Palpus brown; segment 3 slightly ovoid. Thorax (as in Fig. 42B): Nearly uni- formly light brown but with the lateral vitta dark brown. Posterior portion of dorsocentral row with 2 elongate setae situated somewhat lateral to one another. Prescutal suture elongate, interrupted by area of pale cuticle. Anterior anepisternum divided diagonally by sinuous suture, dorsal portion about equal to ventral portion. Ventral portion of posterior anepisternum triangular, uniformly brown, with anterodorsal margin thick. Wing (Fig. 61M): Apex of R 2 equal to apex of M 1. Plain, without pattern of pigmented veins and/or scales; veins (other than costa and wing margin) with well-developed scales. Halter light brown, equal to scutellum. Legs (as in Fig. 42B): Nearly uniformly light brown but with very base of midfemur, about basal half of hind femur pale. With only slender setae, lacking scales (except for some in patch of whip-like setae on posterior portion of hind tibia). Midleg with thick, subapical setae on each of at least tarsomeres 1–3. Apex of foreleg fifth tarsomeres undivided, with claws slightly subapical to apical (as in Fig. 75F). Apex of midleg fifth tarsomeres bilobed in dorsoventral view, with claws subapical (as in Fig. 75E). Elongate claw of foreleg shorter than that of midleg, both longer than those of hind leg. Each claw without inner tooth. Anterior claws of each leg without a basal prong. Foreleg claws unequal. Midleg claws unequal. Foreleg third tarsomere longer than fourth tarsomere. Empodia slender. Abdomen (Fig. 77A): Segments light brown, tergite 9 slightly more darkly pigmented. Genitalia (Fig. 86A): Gonocoxite uniformly pale or light brown, tapering (somewhat distorted and therefore uncertain); anteromedial area with spicules similar in length to those elsewhere on gonocoxite; with well-defined dorsal row of setae, with 2 basal setae of row stout, enlarged and bent subapically, 3 more posterior setae slender, with row restricted to dorsal portion of gonocoxite. With three dorsomedial stout setae, tapering from base, anterior two more stout than posterior setae, anterior seta shorter than second most posterior seta, bases joined by sclerotized plate. Gonostylus (both extended) slightly curved, thicker for basal half, apical half thinner, rounded apically; one elongate, thick subbasal setae, situated posteroventrally; apical seta slender, elongate, simple. Aedeagus somewhat squat, tapering gradually to apex, apex somewhat uncertain but likely with lateral margins separate apically.

Female adult. Descriptive statistics: see Tables 6–11. As for male, with following differences. Head: Coronal suture elongate, extending ventrally past ommatida (as in Fig. 16D). Antenna brown; with flagellomeres as in Fig. 27B, sensilla coeloconica distributed as in Table 1. Clypeus ( Fig. 17R) squarish or somewhat wider than long. Mandible with small, pointed teeth. Palpus as in Fig. 33T. Wing (Fig. 67I). Legs: Apices of fore-, midleg fifth tarsomeres undivided, with claws situated slightly subapically to apically. Claws of each leg equal to those of others; equal on each leg, simple (without inner teeth). Abdomen: Uniformly light brown, segment 9 slightly more darkly pigmented.

Pupa. Described by Lane and Cerqueira (1958). Thorax: Scutum, metathorax without spherical sensory pits. Respiratory organ (Fig. 101B): Broadly flattened, with spiracles along outer margin. Abdomen (Fig. 104B): Segments 3–7 somewhat expanded laterally. Paddle only moderately elongate; apex simple, without socketed spine.

Larva and egg. Unknown.

DISTRIBUTION AND BIONOMICS: Corethrella manaosensis is known from only from the type locality at Manáus , Brazil (Fig. 124) at an altitude of 34 m. Both the holotype and allotype were reared from pupae collected “in a swamp and on running water” ( Lane and Cerqueira 1958) .

TAXONOMIC DISCUSSION: The male and female were associated through the shared presence of a common pigmentation pattern and were reared from the same habitat, with similar looking pupal exuviae. The holotype is missing its antennae, one palpus and one midleg. The allotype is in good condition. Both holotype and allotype were originally pinned with their pupal exuviae in Canada Balsam on a coverslip attached to the pin. Both are now are microscope slides, with their pupal exuviae. The holotype has a larval exuviae of a Culicidae mounted with the pupal exuviae .

MATERIAL EXAMINED: Holotype, adult male on microscope slide, labeled “HOLOTIPO Lutzomiops manaosensis det John Lane, Cerqueira 1957, Amazonas, Manaus, V-1956, Flores, Cerqueira col, S739, T7382, 406-19” (19 uncertain) ( DEFS). Allotype, labeled as for holotype ( DEFS) .

DERIVATION OF SPECIFIC EPITHET: The name manaosensis refers to the type locality at Manáus.