Traegaardhia distosolenidia Zacharda, 2010

Zacharda, Miloslav, Fong, Daniel, Hobbs Iii, Horton H., Piva, Erminio, Slay, Michael E. & Taylor, Steven J., 2010, 2474, Zootaxa 2474, pp. 1-64 : 36-40

Traegaardhia distosolenidia Zacharda , n. sp. ( Figs 25–28)

Material examined

HOLOTYPE: adult female, Italy, Veneto, the Monti Berici Mts, Arcugnano (Vicenza), in the mesovoid shallow substratum habitat ( Juberthie 2000) in a grove east of the Moreieta Restaurant (not in limestone zone), 335 m a.s.l., 29.10.2006, coll. E. Piva, deposited in the Museum of Biological Diversity, Ohio State University, Type No. OSAL0007428; paratypes (deposited with holotype): adult male, Italy, Sardinia, Taquisara, Gairo, NU, Grotta di Taquisara Cave , on surface of a small water pool, 26.12.2004, coll. C. Onnis, OSAL007373; adult female, Sardinia, Taquisara, Gairo, NU, Grotta di San Rena Cave , 26.12.2004, coll. J. De Waele, C. Onnis, S. Papinuto, OSAL007372.

Diagnosis

Cheliceral fixed digit with long prebasal fissure located laterally at level of insertion of proximal cheliceral seta; proximal cheliceral seta inserted just distad of articulation of cheliceral digits; movable digit finely serrated along approximately distal one-fourth of masticatory surface. Palpal tarsus shorter than femorogenu, with ten pubescent setae. Coxae I, II, III, IV with 3-1-6-3 finely pubescent setae, respectively. Rhagidial organ I comprised of four rhagidial solenidia (ω) lying obliquely in separate depressions; stellate famulus (ε) inserted between first and second proximal rhagidial solenidia antiaxially; rhagidial organ II comprised of three rhagidial solenidia lying in tandem in confluent depressions; small spiniform famulus (ε) subtending proximal rhagidial solenidion. Spiniform solenidia (Φ) on tibiae I and II dorsodistal.

Affinities

Traegaardhia distosolenidia n. sp. differs from the other known Traegaardhia species in the dorsodistal position of spiniform solenidia on tibiae I and II.

Etymology

The epithet distosolenidia reflects the unique dorsodistal position of spiniform solenidia on the tibiae I and II in this species. Feminine gender.

Description

Adult female (three examined). Length of idiosoma 720–768 µm. Ratio of leg I length to idiosomal length 1.37–1.46.

Gnathosoma . Subcapitulum broadly oval ( Fig. 26E); ratio of length to breadth 1.12–1.24; distal hypostomal lips with spiniform internal and serrate external malar processes; adoral setae nude, overlapping apex of subcapitulum; proximal subcapitular setae pubescent, external pair slightly longer than internal pair. Dorsal surface of chelicera with distinct saddle-shaped depression slightly distal to level of articulation of digits ( Figs. 26A,B); cheliceral digits long, slender; fixed digit terminates in two cusps, smooth along masticatory surface and with distinct prebasal lateral fissure located at level of insertion of proximal cheliceral seta; movable digit serrated along approximately distal one-fourth of masticatory surface. Chelicera with two setae; proximal seta inserted distad of articulation of movable digit; tip of proximal seta not reaching insertion of distal seta; tip of distal seta distinctly overlaps apex of fixed digit. Length of chelicera 195–214 µm, dorsoventral width 73–79 µm, length of movable digit 73–82 µm, length of proximal and distal cheliceral setae 16–20 and 36–46 µm, respectively, distance between their insertions 26–33 µm. Ratios: cheliceral length to dorsoventral width 2.68–2.70, length of movable digit to length of chelicera 0.37, length of movable digit to dorsoventral width of chelicera 1.0–1.03. Palpal tarsus shorter than femorogenu ( Fig. 26F); ratio of length to width 2.44. Length of palpal trochanter, femorogenu, tibia and tarsus 33–43, 99–109, 43–49 and 73 µm, respectively. Number of setae and solenidia (in brackets) on palpal trochanter, femorogenu, tibia and tarsus 0-2-3- 10(1), respectively, tarsal solenidion spiniform, erect.

Prodorsum. Naso well-developed, with pair of internal vertical setae v 1 ( Fig. 25A). Bothridial setae sc 1 filiform, finely pubescent, overlapping transverse sejugal furrow. Length of setae: v 1 40–46, v 2 46, sc 1 105–119, sc 2 99–115 µm.

Opisthosomal dorsum and anal region. Cupules ia positioned laterally about midway between setae c 1 and d 1; im lateral and just anterior to setae e 1; ip slightly laterodistad of setae f 2; ih partly laterally between insertions of adanal ad 1 and posteriormost pair of aggenital setae ( Fig. 25A,B). Setae c 1, d 1, e 1 reach about half of distance to insertion of successive seta; seta f 1 reaches almost to insertion of h 1. Length of setae: c 1 56–63, c 2 132, d 1 56–59, e 1 49 –53, f 1 72–76, f 2 40, h 1 89–102, h 2 43–49, ps 1 79–89, ps 2 56, ps 3 46, ad 1 46 µm.

Podosoma. Coxae I, II, III, IV with 3-1-6-3 finely pubescent setae, respectively.

Genital region. Genital valves each with six finely pubescent genital setae (g) of similar length, about 26– 49 µm, arranged evenly along medial edge of valve ( Fig. 25B). Five pairs of aggenital setae (ag) of similar length, about 36–56 µm. Length of genital valves 115–122 µm.

Legs. Leg I 1056 µm long, about 1.37–1.46 as long as idiosoma. Empodia of all legs setulose, about as long as claws; claws each with small basal tubercle ventrobasally. Number of setae and solenidia (solenidia and famulus (ε) bracketed), respectively, on legs I-II-III-IV (Figs 27,28): trochanters 1-1-2-2, basifemora + telofemora 5+5-6+5-4+4-3+4, genua 12(1)-9(1)-7(1)-6, tibiae 11(2)-7(2)-7(2)-6(1), tarsi 21(4+ε)-16(3+ε)-14- 14. Genua I and II each with one erect spiniform distoventral solenidion (σ); genu III with one small dorsoproximal spiniform solenidion. Tibia I with one erect spiniform dorsodistal solenidion (Φ) inserted either just distad, or proximad of dorsodistal recumbent rhagidial solenidion ( Fig. 27B); tibia II with one tiny spiniform erect dorsodistal solenidion in tandem with one large lanceolate solenidion recessed in deep pit with large surface pore ( Fig. 27D); tibia III with two contiguous dorsoproximal spiniform solenidia; tibia IV with one erect spiniform dorsoproximal solenidion. Tip of tarsus I suddenly tapers in lateral view, ratio length to width 1.72, with four rhagidial solenidia (ω) lying obliquely in separate depressions dorsodistally; stellate famulus (ε) inserted between first and second proximal rhagidial solenidion antiaxially ( Fig. 26C); tarsus II with three rhagidial solenidia lying in tandem in confluent depressions and small spiniform famulus (ε) subtending proximal rhagidial solenidion ( Fig. 26D).

Adult male (one examined), smaller than female, length of idiosoma 688 µm; ratio of leg I length to idiosomal length 1.39. Genital valves shorter than in females, 89 µm, club-shaped sperm sac showing throug the opisthosomal tegument. Otherwise as in females.

Remark

No remarkable troglomorphisms typical of the Rhagidiidae were discerned in T. distosolenidia , perhaps except the elongated cheliceral digits, but troglomorphisms need not be always developed in troglobionts (Culver, pers. comm.).