Allocladius sp.

Andersen, Trond, Saether, Ole A. & Mendes, Humberto F., 2010, Neotropical Allocladius Kieffer, 1913 and Pseudosmittia Edwards, 1932 (Diptera: Chironomidae) 2472, Zootaxa 2472 (1), pp. 1-77 : 21

Allocladius sp. " Chile "

( Figs 52–55 )

Material examined. CHILE: Región XII, Tierra del Fuego , river about 9 km West of Carabineros, 54º01'S, 68º55'W, 1 pupal exuviae, 12–13.i.1986, M. Spies ( ZSM) .

Pupa (n = 1). Total length 3.75 mm. Exuviae with distinct grayish tinge.

Cephalothorax ( Figs 52–53 ). Frontal apotome wrinkled, without warts, with 35 µm long frontal seta. Distance between Dc 1 and Dc 2 18 µm, between Dc 2 and Dc 3 57 µm, between Dc 3 and Dc 4 11 µm.

Abdomen ( Figs 54–55 ). Tergite I bare, T II–VIII with strong anterior and posterior spinules and weaker median spinules covering most of tergite, T IX with extensive median shagreen. Sternites I–II bare or S II with a few posteromedian spinules, S III with weak median spinules, S IV with slightly stronger median spinules, S V–VIII with shagreen in anterior 2/3, S IX bare or with anterolateral shagreen. Tergal conjunctive III/IV with 45 spinules, IV/V with 120, V/VI with 149, VI/VII with 155 spinules. Sternal conjunctive IV/V with 28 spinules, V/VI with 158, VI/VII with 170, VII/VIII with 119 spinules. Setae of anal segment about 50–60 µm long.

Remarks. The pupa differs from that of A. neobilobulatus by having bare sternal conjunctives III/IV and VIII/IX. It may well be the pupa of A. bilobulatus .

Figures

FIGURES 52–55. Allocladius sp. "Chile", male pupa. 52—frontal apotome; 53—thorax; 54—tergites; 55—sternites.