Tetracanthella corsica, Potapov & Deharveng, 2005

Potapov, Mikhail & Deharveng, Louis, 2005, Three new species of Tetracanthella (Collembola, Isotomidae) from western Europe, Zoosystema 27 (1), pp. 85-93 : 89

Tetracanthella corsica n. sp.

( Fig. 2 )

TYPE MATERIAL. — Corsica. Valdo-Niello forest , no date, R. Dallai leg., holotype and 4 paratypes ( MNHN) ; 2 paratypes ( MSPU) ; 2 paratypes ( Department of Evolutionary Biology , University of Siena ). — Evisa , Aitone forest , meadow, 950 m, 4.IV.1976, L. Deharveng leg. (sample # Co 007), 1 paratype ( MNHN). — Albertacce, Valdo-Niello forest, under rotten wood, 1200 m, 4.IV.1976, L. Deharveng leg. (sample # Co 005), 2 paratypes ( MNHN). — Lonca, no date, J. Orousset leg., 1 paratype ( MNHN) .

ETYMOLOGY. — The name refers to the island of Corsica where the species has been found.

DISTRIBUTION. — Restricted to Corsica.

DESCRIPTION

Body length 0.9 mm. Pigment present, including antennae (more exact description impossible because pigmentation is partly lost). Dorsal plates polygonal, from 0.5 to 2 times as long as diameter of mesochaeta socket from head to Abd. I; from Abd. II to VI, up to six times as long as a mesochaeta socket, specially around the smooth areas ( Fig. 2E ); laterally and around the chaetae, polygons are much smaller. Canals between polygons well marked. Smooth fields present on Abd. IV and V ( Fig. 2E ), and on Abd. III in some specimens. Dorsal mesochaetae of medium size, in posterior row of Abd. IV not longer than on other parts of body (Md/p1 = 2.3-2.7). Mesochaetae not shortened in axial part of tergites: Abd. IV with p3 slightly longer than p1. Macrochaetae rather long, pointed ( Fig. 2D ).

Figures

FIG. 2. — Tetracanthella corsica n. sp.; A, ocelli and PAO; B, furcal area; C, chaetotaxy of Tita III in adult male; D, dorsal chaetotaxy of tergites and posterior edge of head; E, dorsal plates of Abd. V-VI. In D, axial chaetae are marked (only left side on Th. II-III). Abbreviations: Abd. V-VI, abdominal tergites V-VI; PAO, postantennal organ; Th. II, III, thoracic tergite II, III; Tita III, tibiotarsus III.