Galumna (Neogalumna) specifica, Ermilov, Sergey G., Sandmann, Dorothee, Klarner, Bernhard, Widyastuti, Rahaju & Scheu, Stefan, 2015

Ermilov, Sergey G., Sandmann, Dorothee, Klarner, Bernhard, Widyastuti, Rahaju & Scheu, Stefan, 2015, Contributions to the knowledge of oribatid mites (Acari, Oribatida) of Indonesia. 3. The genus Galumna (Galumnidae) with description of a new subgenus and seven new species, ZooKeys 539, pp. 11-51 : 34-37

Taxon classification Animalia Oribatida Galumnidae

Galumna (Neogalumna) specifica sp. n. Figs 56, 57, 58-59, 60-64

Diagnosis.

Body size: 498-531 × 348-365. Subcapitular mentum, genital plates and basal part of prodorsum striate. Lamellar lines straight, divergent to sublamellar lines medio-anteriorly. Prodorsal setae setiform, barbed, le thinnest. Bothridial setae, setiform, ciliate. Anterior notogastral margin developed. Notogastral setal alveoli la absent, cx present. Four pairs of rounded porose areas on notogaster. Median pore absent. Postanal porose area elongate oval.

Description.

Measurements. Body length: 498 (holotype: male), 498-531 (three paratypes: one female and two males); notogaster width: 348 (holotype), 348-365 (three paratypes). Without sexual dimorphism.

Integument. Body color brown. Body surface, pteromorphs and anal plates smooth. Subcapitular mentum, genital plates and basal part of prodorsum with longitudinal striae.

Prodorsum. Rostrum rounded. Medio-anterior part slightly elongate, hump-like. Lamellar lines straight, directed to insertions of rostral setae, but clearly not reaching them. Sublamellar lines curving backwards. Rostral (39-45), lamellar (18-20) and interlamellar (18-20) setae setiform, barbed, lamellar setae thinnest. Bothridial setae long (106-114), setiform, unilaterally ciliate. Exobothridial setae and their alveoli absent. Porose areas Ad narrow, elongate oval, transversally oriented (28-34 × 4).

Notogaster. Anterior notogastral margin developed. Dorsophragmata of medium size, elongated longitudinally. Four pairs of porose areas rounded, with distinct margins: Aa (16-24) usually slightly larger than A1, A2 and A3 (all 12-16). Notogastral setae represented by 10 pairs of alveoli, however, based on their localization, la absent and cx present. Median pore absent in all specimens. All lyrifissures distinct, im located between lm and A1. Opisthonotal gland openings located laterally to A1.

Gnathosoma. Morphology of subcapitulum, palps and chelicerae typical for Galumna (Neogalumna) (see Ermilov and Anichkin 2010, 2014b). Subcapitulum size: 110-114 × 98-102. Subcapitular setae setiform, indistinctly barbed, h (6-8) shorter than a and m (both pairs 12), a thickest, h thinnest. Two pairs of adoral setae (6-8) setiform, hook-like distally, indistinctly barbed. Palps (94) with typical setation: 0 –2–1–3– 9(+ω). Axillary sacculi distinct. Chelicerae (139) with two setiform, barbed setae; cha (45) longer than chb (24). Trägårdh’s organ long, tapered.

Epimeral and lateral podosomal regions. Anterior tectum of epimere I smooth. Apodemes 1, 2, sejugal and 3 well visible. Setal formula: 1 –0–1– 2. Setae thin, smooth, 3b (32-41) longer than 1a, 4a and 4b (6-8). Pedotecta II distally rounded in ventral view. Discidia triangular. Circumpedal carinae distinct, clearly not reaching the insertions of setae 3b.

Anogenital region. Six pairs of genital (g1, g2, 12; g3-g6, 6-8), one pair of aggenital (6-8), two pairs of anal (12) and three pairs of adanal (12) setae thin, smooth. Two setae on anterior edge of each genital plate. Adanal setae ad3 inserted postero-medially to adanal lyrifissures. Postanal porose area elongate oval, transversally oriented (45-57 × 8-12).

Legs. Morphology of leg segments, setae and solenidia typical for Galumna (Neogalumna) (see Ermilov and Anichkin 2010, 2014b). Tridactylous, claws smooth. Formulas of leg setation and solenidia are similar to Galumna (Atypicogalumna) corpuzrarosae sp. n. (Table 1). Solenidion φ of tibiae IV inserted dorsally at about 2/3 length of segment.

Material examined.

Holotype (male) and three paratypes (one female and three males): Indonesia, Sumatra, Harapan landscape, secondary rainforest, research site HF4, 02°11'15.2"S, 103°20'33.4"E, 77 m a.s.l., in upper soil layer (0-5 cm). All specimens were collected by Bernhard Klarner (Nov. 2013) and identified and collected to morphospecies level by Dorothee Sandmann.

Type deposition.

The holotype is deposited in LIPI (Indonesian Institute of Science) Cibinong, Indonesia; two paratypes are deposited in the collection of the Senckenberg Museum, Görlitz, Germany; one paratype is deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.

Etymology.

The specific name specifica refers to the specific set of notogastral alveoli (la absent, cx present).

Remarks.

Galumna (Neogalumna) specifica sp. n. is morphologically most similar to Galumna (Neogalumna) tolstikovi Ermilov & Anichkin, 2014 from Vietnam (see Ermilov and Anichkin 2014b) in having straight lamellar lines, short prodorsal setae, setiform bothridial setae, setal alveoli cx and striate genital plates. However, the new species differs from the latter by larger body size (498-531 × 348-365 vs. 381-415 × 265-298 in Galumna (Neogalumna) tolstikovi ), well developed and barbed interlamellar setae (vs. minute in Galumna (Neogalumna) tolstikovi ), longest rostral setae on the prodorsum (vs. rostral and lamellar similar in length in Galumna (Neogalumna) tolstikovi ), a striate basal part of prodorsum (vs. not striate in in Galumna (Neogalumna) tolstikovi ), an elongated postanal porose area (vs. oval in Galumna (Neogalumna) tolstikovi ) and the absence of setal alveoli la (vs. present in Galumna (Neogalumna) tolstikovi ).