Tanytarsus rhabdomantis ( Trivinho­Strixino & Strixino, 1991 ) Trivinho-Strixino & Sanseverino, 2003

Trivinho-Strixino, Susana & Sanseverino, Angela M., 2003, Tanytarsus rhabdomantis: New combination for Nimbocera rhabdomantis Trivinho-Strixino & Strixino, 1991 (Diptera: Chironomidae), Zootaxa 389, pp. 1-10 : 2

Tanytarsus rhabdomantis ( Trivinho­Strixino & Strixino, 1991) , comb. nov.

Nimbocera rhabdomantis Trivinho­Strixino & Strixino, 1991 ; 4th instar larvae.

Paratypes examined ( Brazil, São Paulo State): four 4th instar larvae, Quinta da Felicidade reservoir, São Carlos (21o 57’S 47o 54’W), March,1987; leg. S. T. Strixino .

Additional material examined ( Brazil, São Paulo State): 1 adult male, 3 pupae with pharate males, 1 4th instar larva with pharate pupa, São Carlos, Quinta da Felicidade reservoir, 14.iv.1984, leg. S. Trivinho­Strixino ; 5 adult males, São Carlos, Lagoa Mayaca (21º 59’S 47º 54’W), 23.v.1993, leg. S. Trivinho­Strixino ; 2 4th instar larvae, Itirapina, Represa do Lobo (22º 10’S 47º 54’W), 1986, leg. S. Trivinho­Strixino ; 1 adult male, Luiz Antônio, Lagoa do Infernão (21º 35’S 47º 49’W), 01.x.1996, leg. K. C. Sonoda ; 2 pupal exuviae, São Carlos, Lagoa Mayaca , 3.viii.2002, leg. T. Siqueira .

Diagnostic characters. Tanytarsus rhabdomantis can be separated from other Tanytarsus species by the following combination of characters. Male Imago: AR about 1.26; M vein with setae, Sc bare in most specimens, in one with two setae; anal tergal bands curved, ending on the middle of tergite, not reaching anal point; anal point elongate and pointed/triangular at tip, with a pair of well developed anal crests; field of microtrichia present between crests; spines absent, 6–9 short, thick setae between anal crests; superior volsella without field of microtrichia, anterior part oval, posterior part projected and somewhat elongate; longitudinal axes of superior volsella and body at angle of about 47×; digitus finger­like, not extending or extending a little beyond median margin of superior volsella; median volsella with foliate lamellae, not reaching apex of inferior volsella. Pupa: Frontal setae thin and short, cephalic tubercles weakly developed; pedicel sheath tubercle apparently absent; thoracic horn slender, with small spines along most of length; wing sheath with well developed nose, prealar tubercle weakly protuberant; three precorneals in a triangular pattern, not placed on tubercle; anterior precorneal stronger, Pc 2 and Pc 3 closer to each other; 2 pairs of dorsocentrals, Dc 4 much stronger than Dc 1–3; tergite III with long spines in long spine bands beginning in anterior half of tergite, bands anteriorly straight, posteriorly curved outward; tergite IV with long spines in bracket­shaped, long spine bands, most of the spines orally directed, anterior spines slightly shorter and caudally and medially directed; tergites V and VI with spines in oval patches anteriorly; tergites VIII–IX with fine shagreen in anterolateral patches; posterolateral comb of segment VIII quite broad with numerous marginal teeth; abdominal segment I without lateral seta, segments II–VII with 3 lateral setae, segment VIII with 3 lateral taeniae. Larva: Antenna very long, placed on prominent pedestal; segment 2 of antenna with narrow, unsclerotized ring near base; Lauterborn organs small, situated on apex of very long and slim pedicels, pedicels annulated for about 4/5 of their length; mentum with eleven teeth; median tooth pale and notched.