Galumna (Galumna) indonesica, 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 : 19-21

Taxon classification Animalia Oribatida Galumnidae

Galumna (Galumna) indonesica sp. n. Figs 20, 21, 22-23, 24-28

Diagnosis.

Body size: 498-531 × 365-381. Lamellar lines straight, directed to rostrum. Prodorsal setae setiform, barbed, lamellar setae shortest, interlamellar setae longest. Bothridial setae setiform, ciliate unilaterally. Anterior notogastral margin developed. Four pairs of porose areas present on notogaster, Aa booth-shaped to elongate triangular, transversally oriented, A1, A2 and A3 rounded. Median pore and postanal porose area present.

Description.

Measurements. Body length: 531 (holotype: female), 498-531 (three paratypes: two females and one male); notogaster width: 381 (holotype), 365-381 (three paratypes). Without sexual dimorphism.

Integument. Body color brown. Body surface, pteromorphs, subcapitular mentum, genital and anal plates punctate (visible in dissected specimens).

Prodorsum. Rostrum rounded. Lamellar lines straight, directed little laterally to insertions of rostral setae. Sublamellar lines curving backwards. Rostral (45-49), lamellar (24-28) and interlamellar (61-73) setae setiform, barbed. Bothridial setae (106-110) long, setiform, densely ciliate unilaterally. Exobothridial setae and their alveoli absent. Porose areas Ad oval, transversally oriented (16-20 × 8-12).

Notogaster. Anterior notogastral margin developed. Dorsophragmata elongated longitudinally. Four pairs of porose areas with distinct margins: Aa (36-49 × 12-16) booth-shaped to elongate triangular, transversally oriented; A1, A2 and A3 (24-32) rounded. Notogastral setae represented by 10 pairs of alveoli, la inserted posteriorly to Aa. Median pore present in all specimens, located between A2. All lyrifissures distinct, im and opisthonotal gland openings located laterally to A1.

Gnathosoma. Morphology of subcapitulum, palps and chelicerae typical for Galumna (Galumna) (see Engelbrecht 1969; Ermilov and Anichkin 2010). Subcapitulum size: 118-123 × 102-106. Subcapitular setae setiform, similar in thickness approximately, barbed, h (18-20), m (20) and a (20-24) differ little in length. Two pairs of adoral setae (16-18) setiform, hook-like distally, barbed. Palps (82) with typical setation: 0 –2–1–3– 9(+ω). Axillary sacculi distinct. Chelicerae (155) with two setiform, barbed setae; cha (57) longer than chb (32). 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 (20-24) longer than 1a, 4a and 4b (8). Pedotecta II rounded anteriorly in ventral view. Discidia triangular. Circumpedal carinae distinct, little, not reaching the insertions of setae 3b.

Anogenital region. Six pairs of genital (g1-g3, 8-10; g4-g6, 4), one pair of aggenital (4), two pairs of anal (4) and three pairs of adanal (4) setae thin, smooth. Three setae on anterior edge of each genital plate. Adanal setae ad3 inserted laterally to adanal lyrifissures. Postanal porose area elongated, transversally oriented (32-36 × 10-16).

Legs. Morphology of leg segments, setae and solenidia typical for Galumna (Galumna) (see Engelbrecht 1969; Ermilov and Anichkin 2010). 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 (female) and three paratypes (two females and one male): Indonesia, Sumatra, Bukit Duabelas landscape, jungle rubber agroforest, research site BJ5, 02°08'35.6"S, 102°51'04.7"E, 51 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 indonesica refers to the country of origin, Indonesia.

Remarks.

Galumna (Galumna) indonesica sp. n. is morphologically most similar to Galumna (Galumna) parakazakhstani Ermilov & Anichkin, 2014 from Vietnam (see Ermilov and Anichkin 2014a) in having lamellar lines directed to the anterior part of the prodorsum, setiform and ciliate bothridial setae, four pairs of notogastral porose areas with Aa elongated and transversally oriented, a median pore and an elongated postanal porose area. However, the new species differs from the latter by the position of rostral setae (nearly to the lamellar lines vs. distanced in Galumna (Galumna) parakazakhstani ), the length of rostral and lamellar setae (rostral setae longer vs. lamellar setae longer in Galumna (Galumna) parakazakhstani ) and the presence of anterior notogastral margin (vs. absent in Galumna (Galumna) parakazakhstani ).