Toojah cimutaa, Cruz-López, 2021

Cruz-López, Jesús A., 2021, Two new genera and two new species of troglobitic harvestmen of Stygnopsidae (Opiliones, Laniatores, Gonyleptoidea) from Oaxaca, Mexico, with notes on selected morphological characters, Zoosystema 43 (5), pp. 101-112 : 107-109

Toojah cimutaa n. gen., n. sp.

( Figs 5-8 )

urn:lsid:zoobank.org:act:4F3A2A0B-3D59-43D4-A89F-C74D8C7983CC

TYPE MATERIAL. — Holotype. Mexico • ♂; Oaxaca, Valle Nacional, Te Cimutaa cave ; 17°54’10.5”N, 96°22’37.5”W; 25.IV. 2008; Paul Bryant leg.; CNAN-T01344 .

DIAGNOSIS. — As for the genus.

ETYMOLOGY. — Noun in apposition referring to the name of the cave where it was found.

DESCRIPTION

Measurement

Scutum length = 3.4 mm; scutum width at mid-bulge level = 1.7 mm, scutum width at posterior margin = 2.8 mm; cheliceral hand length = 3.0 mm.

Body ( Figs 5 ; 6 )

Scutum type zeta (ζ) with the mid-bulge not marked, lateral margins straight, posterior margin of scutum wider than midbulge section giving the appearance of trapeze; ocularium at the frontal margin, wide and rounded, no eyes. Lateral clear areas teardrop-shaped, at level of mesotergal area II. Sulcus I very deep, sulci II-IV shallow. Coxae I and II with similar size, coxae III and IV similar in size and slightly larger than coxae I and II. Coxae I and II ventrally ornated with a row of long spiniform setiferous tubercles; coxae III and IV with a row of widely spaced tubercles. Stigmatic area reverse “T” shaped, spiracles not hidden.

Chelicera ( Fig. 7A, B )

Basichelicerite with long bulla, covering almost all segment. Cheliceral hand swollen, fixed finger with seven teeth, the first and the sixth larger, movable finger five teeth, the basalmost larger and blunt.

Pedipalp ( Fig. 7C, D )

Trochanter with two large spiniform setiferous tubercles on ventral side, the distalmost larger; femur slightly compressed laterally, with a ventral row of seven spiniform setiferous tubercles, the first three larger and decreasing in size slightly; patella unarmed; tibia with IIi (1=2>3) and iiIi (3>1=2=4), major SST on mesal and ectal sides indicated on the figure, tarsus with II (1>2) on both sides, first setiferous tubercle on mesal margin very large, almost the same length than tarsus. Tarsal claw of the same size that tarsus.

Legs ( Table 2 )

Trochanter III rounded,longer than other trochanters.All segments without armature, except apical portion of femur IV with two ventral rows of reduced tubercles. Tarsal count: 8(3):51(8):6:7. Penis ( Fig. 8 )

Base of pars distalis swollen, with the flimsy lamina thick in lateral view and the apical margin ventrally curved. Follis inflated and almost three times larger than wide, with a bilobular dorsal projection, spines only on the ventro-apical portion of follis, stylus inserted in it and with small bristles on the tip. Macrosetal arrangement Stygnopsis - type sensu Cruz-López & Francke (2017), all MS with similar size, spatulate at the tip and with the bases well marked and deep. MS arranged as follow: two pairs of MS E on the middle of flimsy lamina, two pairs of MS C lateral to the base of follis, a pair of MS A dorsally, below the base of follis and a pair of MS B ventrally, near the base of pars distalis.

Female

Unknown.

Figures

FIG. 5. — Habitus of the holotype (CNAN-T01344) of Toojah cimutaa n. gen., n. sp. A, dorsal; B, lateral. Scale bars: 1.5 mm.

FIG. 6. — Scutum and venter of the holotype (CNAN-T01344) of Toojah cimutaa n. gen., n. sp. A, scutum; B, venter. Arrow indicates lateral clear area. Scale bars 1.0 mm.

FIG. 7. — Chelicera and pedipalp of the holotype (CNAN-T01344) of Toojah cimutaa n. gen.,n.sp.A, chelicera mesal;B, chelicera frontal;C, pedipalp mesal; D, pedipalp ventral. SST 1-3 indicated on D. Abbreviations: see Material and methods. Scale bars: 0.75 mm.

FIG. 8. — Penis of the holotype (CNAN-T01344) of Toojah cimutaa n. sp. A, dorsal; B, lateral; C, ventral. MS A, B, C, D and E, and microsetae T2 are marked on each figure. Abbreviations: see Material and methods. Scale bars: 50 µm.