Trachyibana sarawakiensis Kontschán, 2015, sp. nov.
Creators: name: Kontschán, Jenő
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Trachyuropodidae
Trachyibana
Trachyibana sarawakiensis

description: Trachyibana sarawakiensis sp. nov.
(Figs 1–18)
Material examined. Holotype. AS-EM07/4. E-Malaysia: Borneo, Sarawak, Gunung Gading National Park, near Lundu, primary forest, 600‒800m, 01°42'50"N, 109°50'09"E, 28 May 2007, leg. A. Schulz. Paratypes. One female and two males, same data as holotype.
Description. Female. Length of idiosoma 940–950 µm, width 750–780 µm. Shape irregularly oval, vertex slightly elongated, relatively narrow; posterior margin rounded, with shallow subcaudal incisions (Figs 1, 4, 6). Colour reddish brown.
Dorsal idiosoma (Fig. 1). Dorsal and marginal shields completely separated. Dorsal shield neotrichous, all dorsal shield setae T-shaped, with short stem and long crossbar (ca. 23–25 µm). Surface of dorsal shield sculptured by deep and irregular pits. Surface of largest pits covered by a few short lines (Fig. 2). Marginal shield without sculptural pattern; with setae simple and serrate marginally, ca. 35–37 µm in length (Fig. 3).
Ventral idiosoma (Fig. 4). Tritosternum with narrow quadrangular basis; laciniae with two smooth and two apically pilose branches (Fig. 11). Sternal shield without ornamentation, with seven pairs of smooth, short (ca. 12–16 µm) and needle-like sternal setae. Genital shield oblong, ca. 350 µm long, ca. 200 µm wide, linguliform, with reticulate sculptural pattern on anteriormost part and small oval pits on posterolateral parts. Opisthogastric region with a pair of deep furrows bordered by several pairs of distally ramose setae (ca. 42–46 µm) (Fig. 6). Two pairs of ventral setae smooth, needle-like (ca. 15–17µm), others expanded and ramose (ca. 42–46 µm). Surface of ventral shield mostly smooth, except for small finely punctate postanal area (Fig. 7). Adanal and postanal setae similar in shape to ventral setae, but shorter (ca. 11–13µm). Stigmata situated between coxae II and III. Prestigmatic part of peritremes long, with several curves and almost M-shaped, poststigmatic part absent (Fig. 10). Pedofossae deep, their surfaces smooth.
Gnathosoma (Fig. 12). Corniculi horn-like, internal malae longer than corniculi and divided into divided into four fringed branches. Hypostomal setae h1 (ca. 60–62 µm) and h2 smooth (ca. 35–36 µm), h3 and h4 marginally serrate (ca. 30–35 µm), h3 situated close to h2. Palp trochanter with one short and smooth seta and one long and marginally serrate seta. Other setae on palp smooth and needle-like. Epistome subtriangular and deeply serrate on anterior margins (Fig. 13), chelicerae with two teeth on movable and fixed digits, internal sclerotised node present, one dorsal seta present (Fig. 14).
Legs (Figs 15–18). Legs I–IV each with a pair of claws at the tip of the ambulacral prolongation, claws on legs I smaller. Setae on legs mostly needle-like, several robust and marginally serrate setae situated on all legs. Flap-like extensions present on femora II–IV.
Male. Length of idiosoma 960–970 µm, width 780–810 µm (n=2). Shape as in female.
Dorsal idiosoma: Ornamentation and chaetotaxy of dorsal shield as for female.
Ventral idiosoma: Ornamentation and chaetotaxy of ventral shield as in female. Sternal shield without sculptural pattern, except for reticulate sculptural pattern near anterior margin (Fig. 9). Positions of sternal setae as in Fig. 8. Sternal setae smooth and needle-like (ca. 11–15 µm long), except setae St1 T-shaped. Genital shield rounded and placed between coxae III. Other characters same as in female.
Etymology. The name of the new species refers to the province where the specimens were collected.
description: Published as part of Kontschán, Jenő, 2015, Trachyibana sarawakiensis gen. nov., sp. nov., a remarkable new genus and species from Malaysia (Acari: Uropodina: Trachyuropodidae), pp. 272-278 in Zootaxa 3915 (2) on pages 273-277, DOI: 10.11646/zootaxa.3915.2.6, http://zenodo.org/record/243784