Uroobovella pilosetosa, Material, 2012

UrooboƲella pilosetosa spec. nov.

Figs 1-14 View Figs 1- 4 View Figs 5- 9 View Figs 11- 14

Material examined. Holotype: female, New Zealand, Lynfield , Wattle Bay, collected under driftwood on beach 16.08.2010, leg. S. E. Thorpe ( NZAC) . – Paratypes: male, same locality and date as holotype ( NZAC) ; two females in NHMG , three females in HNHM and one female in ZSM , same locality and date as holotype .

Description

Female. Length of idiosoma 800-910 µm, width 670-710 µm (n =7). Shape of idiosoma oval.

Dorsal aspect of idiosoma ( Fig. 1 View Figs 1- 4 ): Marginal and dorsal shields fused anteriorly.All dorsal setae smooth and needle-like (c. 35-40 µm), except two pairs near caudal margin, which are pennate ( Fig. 2 View Figs 1- 4 ). Marginal setae similar in shape and length to dorsal setae. Dorsal and marginal shields without sculptural pattern.

Ventral aspect of idiosoma ( Fig. 3 View Figs 1- 4 ): Sternal setae short (c.9-10 µm), smooth and needle-like. St1 placed on level of anterior margin of genital shield, St2 on level of anterior margin of coxae II, St3 on level of posterior margin of coxae II, and St4 on level of anterior margin of coxae III, St5 on level of central area of coxae III, St6 situated near basal margin of genital shield, St7 on level of central area of coxae IV. Surface of sternal shield mostly smooth, but several oval pits and sensory organs present on area of coxae III and IV ( Fig. 4 View Figs 1- 4 ). Ventral shield without sculptural pattern, all ventral setae smooth and needle-like (c. 40 µm). Several setae on central area associated with short sensory hairs ( Fig. 6 View Figs 5- 9 ).Adanal setae smooth and needle-like, ad1 (c. 35 µm) shorter than ad2 (c. 40 µm), postanal seta absent. Genital shield oval ( Fig. 5 View Figs 5- 9 ), without any process and pattern. Genital shield placed between coxae II and III. Peritremes 7-shaped ( Fig. 7 View Figs 5- 9 ).

Tritosternum ( Fig. 8 View Figs 5- 9 ) with narrow basis, tritosternal laciniae marginally pilose, apically divided into two short and smooth branches.

Gnathosoma ( Fig. 8 View Figs 5- 9 ): Corniculi horn-like, internal malae marginally pilose. Hypostomal setae h1 long (c. 40 µm) and smooth, h2 (c. 20 µm), h3 (c. 30 µm) and h4 (c. 6 µm) marginally pilose.Central region of hypostoma covered by several small teeth between h1 and h2. Fixed digit of chelicerae longer than movable digit and bearing long sensory organ on fixed digit. Cheliceral nodes and dorsal seta present ( Fig. 9 View Figs 5- 9 ). Epistome marginally pilose.

µm

100

Legs ( Figs 11-14 View Figs 11- 14 ): Bearing smooth and simple setae, the first leg with ambulacral prolongation.

Male. Length of idiosoma 910 µm, width 610 µm (n = 1). Shape, dorsal aspect of idiosoma similar to that of female.

Ventral aspect of idiosoma (Fig. 10). Sternal setae short (c. 12 µm), smooth and needle-like. St1 placed near anterior margin of sternal shield, St2 and St3 on level of central area of coxae II, St4 and St5 on level of posterior margin of coxae II, St6 on level of central area of coxae III, St7 situated near basal margin of genital shield, St8 on level of central area of coxae IV. Surface of sternal shield mostly smooth, but several oval pits and sensory organs presented on area of coxae III and IV. Genital shield circular, without sculptural pattern and situated between coxae III.

Ventral setation, processes of gnathosoma and legs same as in female.

Nymphs and larva. Unknown.

Etymology. The name of the new species refers to the pilose setae on caudal area of dorsal shield.

Remarks. The new species belongs to the Uroobooella oinicolora -group ( Hirschmann 1989) on the basis of the presence of seven pairs of sternal setae in the females. Currently the group consists of nine species, but two species are known only as deutonymph ( U. aeichmanni (Vitzthum, 1923) and U. michiganensis (Vitzthum, 1926) , hence they cannot be compared to the new species. The marginal shield reduced on the caudal region of the body in U. neoamericana Hirschmann, 1972 , U. feideri Hutu, 1976 and U. erlangensis Hirschmann & Zirngiebl-Nicol, 1962 . In contrary the new as well as the rest of the known species have a single marginal shield on the caudal region. The new species has a smooth ventral shield, which is covered by reticulate pattern in U. oinicolora (Vitzthum, 1926) and U. baloghi Hirschmann & Zirngiebl-Nicol, 1962 . The last two known species ( U. rubra Athias-Binche, 1983 and U. bistellaris (Vitzthum, 1935) with smooth ventral shield have hook-like peritremes (which is 7-shaped in the new one) and they bear smooth caudal setae on the dorsal shield, but these setae are pilose in the new one.