Scutacarus ellipticus Karafiat, 1959

Jagersbacher-Baumann, Julia & Ebermann, Ernst, 2016, Support for the underrepresented sex: new descriptions of scutacarid males (Acari, Heterostigmatina), Zootaxa 4179 (3), pp. 371-409 : 390-393

publication ID	https://doi.org/ 10.11646/zootaxa.4179.3.3
publication LSID	lsid:zoobank.org:pub:EB3D8CAC-B3D0-4007-ABB8-F2DDDBBCF26
DOI	https://doi.org/10.5281/zenodo.5670910
persistent identifier	https://treatment.plazi.org/id/517CE246-885B-FFC2-FF13-AAD7FEBBFE70
treatment provided by	Plazi
scientific name	Scutacarus ellipticus Karafiat, 1959
status

Treatment

( Figs. 1 View FIGURE 1 , 3 View FIGURE 3 , 14 View FIGURE 14 , 15 View FIGURE 15 )

MALE. Idiosoma length 120–160, n = 10.

Gnathosoma ( Fig. 1 View FIGURE 1 f) extended, tube-shaped. One pair of finger-shaped solenidia, two pairs of dorsal setae ch 1 and ch 2 and one ventral pair of ventral setae su, thin, smooth, su slightly longer than ch 1 and ch 2. One pair of short tube-like accessory setigenous structures distally.

Dorsum ( Fig. 14 View FIGURE 14 a). Idiosoma with four sclerotized, finely dotted plates. Most posterior plate forms dorsal cover for genital capsule. Length of dorsal setae: v about 7, sc 1 7, sc 2 24, c 1 23, c 2 22, d 23, e 8, f 32, h 1 6. Setae v, sc 1, e smooth, sc 2, c 1, c 2, d, f distally strongly barbed, all setae blunt-ended. h 1 and h 2 smooth, blunt-ended, h 2 minute. Distance between dorsal setae: v–v about 6, sc 1 –sc 1 27, sc 2 –sc 2 20, c 1 –c 1 27, c 2 –c 2 63, d–d 51, e–e 36, f–f 20, h 1 –h 1 22, h 2 –h 2 21.

Genital apparatus ( Figs. 3 View FIGURE 3 f, 14a). Segments H and PS fused, form genital capsule. Length of genital plate (tergite H) about 45. Posterior edge of plate narrowed, ratio length: width of genital plate = 1: 0.49. Area posterior of h 1 with roundish, sucker-like structures or cavities. Aedeagus like in I. dispar .

Venter ( Fig. 14 View FIGURE 14 b). Sternal plates finely dotted. Ap1 weakly sclerotized, prosternal ap continuous from ap1 to sejugal ap; ap2, sejugal ap, ap3, and ap4 complete, weakly sclerotized; ap5 strongly sclerotized; poststernal ap between ap 3I and ap5 complete, strongly sclerotized. Length of ventral setae: 1 a about 9, 1 b 10, 2 a 9, 2 b 10, 3 a 9, 3 b 9, 3 c 9, 4 a 7, 4 b 9, 4 c 8, ps 1 5, ps 2 9. All setae smooth, short, pointed. Distance between ventral setae: 1 a –1 a about 10, 1 b –1 b 36, 2 a –2 a 19, 2 b –2 b 36, 3 a –3 a 20, 3 b –3 b 35, 3 c –3 c 55, 4 a –4 a 22, 4 b –4 b 5, 4 c –4 c 47, ps 1 –ps 1 17, ps 2 –ps 2 19.

Leg I ( Fig. 15 View FIGURE 15 a). Setal formula: Tr1–Fe3–Ge4–Ti6(2)–Ta13(2). Ta with one small, padded claw. Sol ω2 thick, sol ω1 thin, both finger-shaped, sol ϕ1 club-shaped, sol ϕ2 finger-shaped. Length of solenidia: ω1 about 10, ω2 21, ϕ1 6, ϕ2 8. Setae pl’, pv’’, l’Ti and l’’Ge sparsely barbed, all other setae smooth; all setae pointed. Eupathidia tc’ and tc’ ’ situated on a low process.

Leg II ( Fig. 15 View FIGURE 15 b). Setal formula: Tr1–Fe3–Ge3–Ti4(1)–Ta7(1). Ta with two small claws and empodium. Sol ω thick, finger-shaped, ϕ club-shaped, ω 15, ϕ 5. Setae pv’, pl’’, v’Ti, v ’’ Ti and l’Ge sparsely barbed, all other setae smooth, all setae pointed.

Leg III ( Fig. 15 View FIGURE 15 c). Setal formula: Tr1–Fe2–Ge2–Ti4(1)–Ta7. Ta with two small claws and empodium. Sol ϕ 5, finger-shaped. Eupathidia tc’ and tc’’, setae u’, u’’, pv’’, dTi and l’Fe smooth, all other setae sparsely barbed; all setae pointed.

Leg IV ( Fig. 15 View FIGURE 15 d, Table 1 View TABLE 1 ). Setal formula: Tr1–Fe1–Ge1–Ti4(1)–Ta6. Distal Ta with two adhesive pads of differing size. Tarsal setae tc’, tc’’ are longest, length tc’ about 54, tc’’ 29. Seta v’’Ti and pv’’ spine-like, smooth, v’’Ti> pv’’, pl’’ hook-like, smooth. Setae tc’, tc’’, v’Ti and dGe sparsely barbed, other setae smooth. Seta u small, sol ϕ 8, thin, finger-shaped. Small broad spine proximal to solenidion.

Differential diagnosis. Males of S. ellipticus can be differentiated from Archidispus , Heterodispus and Imparipes by the presence of accessory setigenous structures on the gnathosoma. Amongst the remaining known males, S. ellipticus is unique because of the dorsal setae sc 2, c 1, c 2, d and f, which are strongly barbed distally. Material examined. 10 males from laboratory cultures based on females from soil; AUSTRIA: Dobl, 46°56'56.8"N, 15°22'26.2"E, 1985, leg. Ebermann.

Deposition of material. 2 males: Natural History Museum Vienna, Austria ( NHMW 27.643 View Materials ) ; 6 males: Institute of Zoology , University of Graz, Austria ; 2 males: Museum of Natural History of the City of Geneva, Switzerland .