Galumna (Atypicogalumna) corpuzrarosae, 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 : 12-14

Taxon classification Animalia Oribatida Galumnidae

Galumna (Atypicogalumna) corpuzrarosae sp. n. Figs 1, 2, 3-4, 5-9

Diagnosis.

Body size: 332-365 × 232-265. Rostral and lamellar setae setiform. Interlamellar setae represented by alveoli. Bothridial setae clavate. Anterior notogastral margin developed. Four pairs of rounded porose areas and three pairs of sacculi on notogaster. Median pore and postanal porose area present.

Description.

Measurements. Body length: 332 (holotype: male), 332-365 (nine paratypes: three females and six males); notogaster width: 232 (holotype), 232-265 (nine paratypes). Without sexual dimorphism.

Integument. Body color light brown. Body surface, pteromorphs, genital and anal plates punctate (visible in dissected specimens), subcapitular mentum smooth. Several short longitudinal striae present in basal part of prodorsum (postero-laterally to alveoli of interlamellar setae).

Prodorsum. Rostrum rounded. Lamellar (L) and sublamellar (S) lines distinct. Rostral setae (ro, 26-28) setiform, barbed. Lamellar setae (le, 12-16) thin, indistinctly barbed. Interlamellar setae (in) represented by alveoli. Bothridial setae (bs, 57-61) clavate, with long stalk and shorter head rounded and barbed distally. Exobothridial setae and their alveoli absent. Porose areas Ad oval, transversally oriented (16-18 × 6).

Notogaster. Anterior notogastral margin developed. Dorsophragmata elongated longitudinally. Four pairs of porose areas rounded, with distinct margins: Aa (16-20) slightly larger than A1, A2 and A3 (all 12-16). Three pairs of sacculi with minute channels and small openings: Sa located antero-medially and nearly to Aa, S2 - medially and distanced to A2, S3 - medially and nearly to A3. Notogastral setae represented by 10 pairs of alveoli, la inserted posteriorly to Aa. Median pore present in all specimens, located between A3. All lyrifissures (ia, im, ip, ih, ips) distinct, im located anteriorly and nearly to A1. Opisthonotal gland openings located antero-laterally to A2.

Gnathosoma. Morphology of subcapitulum, palps and chelicerae typical for Galumna (see Engelbrecht 1969; Ermilov and Anichkin 2010). Subcapitulum size: 82-86 × 69-73. Subcapitular setae setiform, slightly barbed, h (6-8) shorter than m (10-12) and a (16), a thickest, h thinnest. Two pairs of adoral setae (or1, or2, 12) setiform, hook-like distally, barbed. Palps (53) with typical setation: 0 –2–1–3– 9(+ω). Axillary sacculi (sac) distinct. Chelicerae (98) with two setiform, barbed setae; cha (34-36) longer than chb (22-24). 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 (1a, 3b, 4a, 4b) similar in length (4), thin, smooth. Pedotecta II rounded distally in ventral view. Discidia (dis) triangular. Circumpedal carinae (cp) distinct, clearly not reaching the insertions of setae 3b.

Anogenital region. Six pairs of genital (g1-g3, 8; g4-g6, 4), one pair of aggenital (ag, 4), two pairs of anal (an1, an2, 4) and three pairs of adanal (ad1-ad3, 4) setae thin, smooth. Three setae on anterior edge of each genital plate. Adanal setae distanced equal from each other, inserted in one diagonal row on each side of adanal region. Setae ad3 inserted laterally to adanal lyrifissures. Postanal porose area (Ap) elongate oval, transversally oriented (24 × 6).

Legs. Morphology of leg segments, setae and solenidia typical for Galumna (see Engelbrecht 1969; Ermilov and Anichkin 2010). Claws smooth. Formulas of leg setation and solenidia: I (1 –4–3–4– 20) [1 –2– 2], II (1 –4–3–4– 15) [1 –1– 2], III (1 –2–1–3– 15) [1 –1– 0], IV (1 –2–2–3– 12) [0 –1– 0]; homologies of setae and solenidia indicated in Table 1. Solenidion φ of tibiae IV inserted dorsally at about 2/3 length of segment.

Material examined.

Holotype (male) and nine paratypes (three females and six males): Indonesia, Sumatra, Harapan landscape, jungle rubber agroforest, research site HJ1, 01°55'40.0"S, 103°15'33.8"E, 51 m a.s.l., in forest floor litter material. 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; six paratypes are deposited in the collection of the Senckenberg Museum, Görlitz, Germany; three paratypes are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.

Etymology.

The specific name is dedicated to our friend and colleague, acarologist, Dr. Leonila Corpuz-Raros (Crop Protection Cluster, College of Agriculture and Museum of Natural History, University of the Philippines Los Baños, Los Baños, Philippines).

Remarks.

Galumna (Atypicogalumna) corpuzrarosae sp. n. differs from the all species of the family Galumnidae by the presence of porose areas and sacculi on the notogaster (vs. either porose areas or sacculi in other species).