Gamasiphoides acanthioides, Karg & Schorlemmer, 2011

Karg, W. & Schorlemmer, A., 2011, New Insights Into The Systematics Of Parasitiformes (Acarina) With New Species From South America, Acarologia 51 (1), pp. 3-29 : 19-24

Gamasiphoides acanthioides n. sp.

Holotype — ~ Brazil 1970, Bom Jesus de Pirapora , humus, collector K. Lenko.

Paratypes — 1 ~, 1 |, 2 deuto-nymphs, the same habitat.

Etymology — Acanthion = porcupine, as to the long setae of the body.

Diagnosis — Characterized by remarkable long setae of the dorsum, a broad and pointed tectum, a ventrianal shield distinctly wider than long and very slender metapodal shields behind coxae IV ( Figures 11 , 12 ).

Description — Idiosoma ~ 660 – 670 x 445 – 487 µm, brown.

Dorsum: With remarkable long setae, especially lateral and posterior setae long, caudal setae Z4 as long as half the width of the dorsum, setae at the vertex shorter, i1 = 53, s1 = 24, z2 = 70, z3 = 140, i2 = 88, i3 = 140, i4 = 90, i5 = 105, s2 = 63, s3 = 175, s4 = 140, I1 = 90, I2 = 105, I3 =77, I4 = 105, I5 = 35, Z3 = 105, Z4 = 235, S1 = 140, S5 = 182 µm long.

Venter: Marginal-caudal part of the dorsum turned down to the venter carrying the r- and Rsetae, posterior setae of them longer than the anterior setae, R 5 = 210 µm long, peritrematal shields with a dotted marginal strip, sternal setae st1, st2, st3 35 to 40 µm however st4 = 60 µm long, genital setae 70 µm, ventrianal shield with six pairs of setae (including paranal setae), 60 to 70 µm long, ventrianal shield 350 µm wide and 280 µm long, on body-shields no distinct structure-lines visible, only on the ventrianal shield some fine transverse lines, the small metapodal shields behind coxae IV like slender double-sided wedges.

Gnathosoma: Middle point of the tectum relative broad, shorter (= 28 µm) than the width of the tectum-basis (= 42 µm), hypostomatic setae C2 and C3 inserted at the same level, C1 = 50, C2 = 68, C3 = 77, C4 = 70 µm long.

Legs: I = 740, II = 652, III = 610, IV = 696 µm long, relevant chaetotaxy on genu III = 2,4/1,1 and genu IV = 2,5/1,1 corresponding with the known patterns of the genus.

Idiosoma | 609 x 348 µm, setation of shields and shape of the tectum similar to the females, however, legs I longer than the idiosoma: = 740 µm long, legs II with spurs at femur, genu and tibia, movable digitus of chelicerae with pointed spermatodactyl as long as the digitus.

Idiosoma deuto-nymph 522 x 418 µm, setation similar in female and male, tectum with small additional points.

Figures

FIGURE 11: Gamasiphoides acanthioides n. sp. a – Female Tectum, 42 µm wide; b – Deuto-nymph Tectum, 35 µm wide; c – Female Dorsum, 660-670 µm long.

FIGURE 12: Gamasiphoides acanthioides n. sp. a – Female Venter; b – Male Chelicera, 10 µm; c – Male Femur, genu, tibia, tarsus of leg II, 52 µm long.