SPINELLI Gustavo Ricardo
congresos y reuniones científicas
The larva and pupa of Culicoides albomaculus Hoffman observed with Scanning Electron Microscope (Diptera: Ceratopogonidae)
Buenos Aires
Congreso; V Congreso Argentino de Entomologia; 2002
Institución organizadora:
Sociedad Entomológica Argentina
The biting midge Culicoides albomaculus was originally described by Root & Hoffman in1937, based on adult specimens of both sexes from San Jacinto, Mexico D.F., which were collected by Alfonso Dampf in 1931-1932 with light traps. Subsequently the species has never been mentioned again in the literature except in reference to its original description and/or type-series. The purpose of this presentation is to provide the first descriptions of the larva and pupa of C. albomaculus, from material recently collected in San Salvador Cuauhtenco, Milpa Alta (19º 11’ 14’’ N, 99º 05’ 20’’ W, altitude 9300 ft). The specimens were collected as larvae and pupae inside of hollows of “magueys” (Agave sp., Agavaceae, the main source of “pulque”, an alcoholic local beverage), reared to the adulthood in the laboratory, where they were determined as C. albomaculus. This species doesn´t fit in any of the recognized Culicoides subgenera or species groups, being included by several authors within “Miscellaneous Unplaced Species”. The anterodorsal tubercle of the pupal cephalothorax bears one long, stout seta, bifid at tip; the respiratory horn has four lateral and 12-14 apical spiracles, the operculum two well developed anteromarginal tubercles, and the 4th abdominal segment the following disposition and shape of the tubercles: 2 dasm: i base rounded seta long and thin, ii base rounded seta longer than i; 5 dpm: i base broad, seta minute, ii base rounded seta minute, iii base rounded and setae absent, iv base more elongate and apices rounded, setae short, thin, sharp, v same as iv with setae longest; 1 lasm: base broad, seta sharp, long and stout; 3 lpm: i-iii extended, apicolateral spines long, sharp, stout; and 3 vpm: i-iii base broad, sharp apicolateral spine, spine ii longer than i and iii; anterolateral spiracle present. The larva exhibits some of the characters which are typical of tree hole breeding species, such as diffuse yellowish brown thoracic pigmentation, and large “o” and “i” setae of caudal segment. On the other hand, the epipharyngeal lateral curtains are reduced when compared with the majority of tree hole breeding species.