Carinogalumna philippinensis, Ermilov, Sergey G. & Corpuz-Raros, Leonila, 2015

Ermilov, Sergey G. & Corpuz-Raros, Leonila, 2015, New species of oribatid mites with auriculate pteromorphs (Acari, Oribatida, Galumnidae) from the Philippines, Zootaxa 3905 (4), pp. 511-528 : 518-520

Description of Carinogalumna philippinensis sp. n.

( Figs 10–18 )

Diagnosis. Body size: 581–647 × 431–498. Rostrum pointed. Rostral, lamellar and interlamellar setae long, sparsely barbed. Bothridial setae with lanceolate head. Lamellar and sublamellar lines parallel, curving backwards. Translamellar line (interrupted medially) and cerotegumental tubercles on pteromorphs present in some specimens. Anterior notogastral margin developed. Three pairs of oval porose areas present. Median pore present. Epimeral setae 3b longest, 4a considerably shorter, others minute. Genital plates with longitudinal stria in medial parts. Adanal setae ad 3 inserted laterally to adanal lyrifissures iad. Postanal porose area oval.

Description. Measurements. Body length: 614 (holotype: male), 581–647 (seven paratypes: three females, four males); notogaster width: 481 (holotype), 431–498 (seven paratypes).

Integument ( Figs 10–14, 17 , 19 ). Body color brown. Body surface smooth, only genital plates with several longitudinal stria in medial parts. Whole body covered by dense cerotegumental microgranules (diameter less than 1). Pteromorphs with cerotegumental tubercles (diameter up to 4), but these are absent in half of studied specimens.

Prodorsum ( Figs 10 , 12 , 14–16 ). Rostrum pointed. Rostral (61–73), lamellar (86–102) and interlamellar (139–159) setae setiform, sparsely barbed. Bothridial setae (127–139) with long stalk and shorter, weakly lanceolate and barbed head. Exobothridial setae and their alveoli absent. Porose areas Ad elongate oval, transversely oriented (20 × 4–6). Lamellar lines very thick, sublamellar lines thin, both parallel, curving backwards. Translamellar line interrupted medially, indistinctly developed in some specimens.

Notogaster ( Figs 10 , 12, 13 , 17 ). Anterior notogastral margin developed. Dorsophragmata of medium size, longitudinally elongated. Notogastral setae represented by 10 pairs of alveoli. Three pairs of porose areas with distinct borders, oval: Aa (28–36 × 16–20); A1 (16–45 × 10–26); A3 (20–36 × 16–20). Alveoli la inserted posteriorly to Aa. Lyrifissures im located between setal alveoli lm and lp. Opisthonotal gland openings located laterally to A1. Median pore present, located between A1.

Gnathosoma . Morphology of subcapitulum, palps and chelicerae generally typical for species of the genus Carinogalumna and other Galumnidae (for example, Engelbrecht 1969, 1972; Ermilov & Anichkin 2010; Ermilov et al. 2011; Ermilov & Martens 2014). Subcapitulum longer than wide (135–139 × 123). Subcapitular setae simple, slightly barbed: a (24–32) longer than m and h (both 10–12). Two pairs of adoral setae (14) setiform, barbed. Palps (90) with setation 0–2–1–3–9(+ω). Solenidion straight, thickened, blunt-ended, attached to eupathidium. Chelicerae (143–147) with two setiform, barbed setae; cha (45–49) longer than chb (28). Trägårdh’s organ distinct, tapered.

Epimeral and lateral podosomal regions ( Fig. 11 ). Apodemes (1, 2, sejugal, 3) well visible. Five pairs of epimeral setae (1a, 3b, 4a, 4b, 4c) present; 3b (36–41) and 4a (12) slightly barbed, other setae shorter (4), smooth. Pedotecta II rectangular, rounded anteriorly in ventral view. Discidia triangular. Circumpedal carinae long, directed laterally to the insertions of 3b.

Anogenital region ( Figs 11 , 13 , 18 ). Six pairs of genital setae (g 1– g 2, 10–12, g 3– g 6, 4), one pair of aggenital (4), two pairs of anal (4) and three pairs of adanal (4) setae minute, thin, smooth. Anterior edge of genital plates with two setae. Adanal setae ad 3 inserted laterally to adanal lyrifissures iad. Postanal porose area (Ap) transversely oval (16–28 × 8–16).

Legs. Morphology of leg segments, setae and solenidia generally typical for species of the genus Carinogalumna and other Galumnidae (for example, Engelbrecht 1969, 1972; Ermilov & Anichkin 2010; Ermilov et al. 2011). Formulae 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 .

Material examined. Holotype (male) and four paratypes (three females, one male): Philippines, Luzon Island, Mount Makiling, Makiling Botanic Gardens, Los Baños, Laguna, in soil from undisturbed secondary forest, 1.VI.1975, collected by J.M. Sotto & R.C. Garcia. Three paratypes (all males): Philippines, Luzon Island, Mount Makiling, Mudspring area, Los Baños, Laguna, in leaf litter from mahogany forest ( Swietenia macrophylla ), 6.X.1974, collected by R.S. Raros & L.A.C. Raros.

Type deposition. The holotype is deposited in the collection of the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia; five paratypes are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia; two paratypes are deposited in the Museum of Natural History, University of the Philippines Los Baños, College, Laguna, Philippines.

Etymology. The specific name “ philippinensis ” refers to country of origin, Philippines.

Remarks. Carinogalumna philippinensis sp. nov. differs from all species of Carinogalumna ( C. alineata Ermilov & Martens, 2014 from Nepal, C. clericata ( Berlese, 1914) from the Neotropical region, C. genavensium ( Mahunka, 1998) from Antilles and C. montana Engelbrecht, 1973 from South Africa) by the presence of three pairs of notogastral porose areas (versus four pairs in the other species Carinogalumna ) and parallel lamellar and sublamellar lines (versus divergent in distal part or sublamellar lines absent in the other species of Carinogalumna ).

Figures

FIGURE 10. Carinogalumna philippinensis sp. nov., adult: dorsal view. Scale bar 200 Μm.

FIGURE 11. Carinogalumna philippinensis sp. nov., adult: ventral view. Scale bar 200 Μm.

FIGURES 12 – 13. Carinogalumna philippinensis sp. nov., adult: 12 — lateral view of prodorsum and anterior part of notogaster and pteromorph; 13 — posterior view. Scale bar 100 Μm.

FIGURES 14 – 18. Carinogalumna philippinensis sp. nov., adult, brightfield micrographs: 14 — rostrum; 15 — lamellar and sublamellar lines and lamellar seta; 16 — bothridial seta; 17 — tubercles on pteromorph; 18 — microgranules in anogenital region. Scale bars 50 Μm (14, 16), 20 Μm (15, 17, 18).

FIGURE 19. Setogalumna luzonica sp. nov., adult: dorsal view. Scale bar 400 Μm.