Notogalumna lagunaensis, Ermilov & Corpuz- Raros, 2015

Ermilov, S. G. & Corpuz- Raros, L., 2015, A new species of Notogalumna (Acari, Oribatida, Galumnidae) from the Oriental region with a key to known species, Acarologia 55 (3), pp. 267-276 : 268-276

Notogalumna lagunaensis n. sp.

( Figures 1-5 )

Diagnosis — Body size: 531 – 581 × 365 – 415. Body covered by microgranular cerotegument. Notogaster and anogenital region foveolate. Rostral, lamellar and interlamellar setae long, barbed. Lamellar setae inserted between lamellar lines. Bothridial setae setiform, smooth. Anterior notogastral margin not developed. Notogaster with three pairs of porose areas, A1 very large, boomerang-shaped. Genital and aggenital setae of medium size, anal and adanal setae minute. Adanal setae ad 3 inserted near anal aperture. Postanal porose area represented by one pair.

Description — Measurements. Body length: 564 (holotype: female), 531 – 581 (six paratypes: three females and three males); body width: 398 (holotype), 365 – 415 (six paratypes).

Integument — Body color brown, covered by cerotegumental microgranules (less than 1, but well visible under high magnification in dissected specimens). Notogaster and anogenital region with small, round foveolae (up to 4). Ventral side with two transverse striate bands (sb) located laterally between genital and anal plates, and one arcuate striate band located posteriorly to anal plates, extending into the ano-adanal region.

Prodorsum — Rostrum broadly rounded. Lamellar (L) and sublamellar (S) lines thin, distinct, parallel. Rostral (ro, 73 – 82), lamellar (le, 82 – 90) and interlamellar (in, 73 – 82) setae setiform, barbed. Rostral and lamellar setae directed forwards, interlamellar setae directed medially. Lamellar setae inserted between lamellar lines. Bothridial setae (ss, 90 – 102) setiform, with short attenuate tips, smooth. Exobothridial setae and their alveoli absent. Porose areas Ad elongate oval, transversally oriented (16 – 24 × 6 – 8).

Notogaster — Anterior margin not developed. Dorsophragmata (D) long, elongated longitudinally. Ten pairs of alveoli of notogastral setae well visible. Three pairs of porose areas with slightly distinct margins, varied in sizes: Aa elongate oval (28 – 49 × 16 – 20), transversally oriented; A1 very large, boomerang-like; A3 oval (28 – 36 × 16 – 24). Porose areas Aa located between setal alveoli la and lm, nearer to the latter; A3 located in corners of the truncated part of notogaster. Median pore absent. All lyrifissures (ia, im, ip, ih, ips) distinct; im located anteriorly or antero-laterally to A1. Opisthonotal gland openings (gla) located laterally to setal alveoli h 3.

Roman letters refer to normal setae, Greek letters to solenidia (except ɛ = famulus). Single prime (') marks setae on anterior and double prime ('') setae on posterior side of the given leg segment. Parentheses refer to a pair of setae.

Gnathosoma — Subcapitulum longer than wide (114 – 131 × 102 – 114). Subcapitular setae setiform, slightly barbed; a (24 – 28) shorter than h (32 – 36) and m (36 – 41). Two pairs of adoral setae (or 1, or 2, 12 – 16) setiform, densely barbed. Palps (90) with setation 0-2-1-3-9(+ ω). Solenidion attached to eupathidium, both located on dorsal tubercle. Chelicerae (151 – 159) with two simple, barbed setae; cha (53 – 57) longer than chb (24 – 28). Trägårdh’s organ (Tg) long, tapered.

Epimeral and lateral podosomal regions — Anterior tectum of epimere I smooth. Apodemes 1, 2, sejugal and 3 well visible. Eight pairs of setae observed; setal formula: 1-1-3-3. Setae 1b, 3b, 3c, 4c (36 – 41) and 4a, 4b (24 – 32) thin, slightly barbed; 2a and 3a minute (2) or represented by alveoli. Pedotecta I (Pd I) broadly rounded, pedotecta II (Pd II) rectangular, rounded distally in ventral view; both scalelike in lateral view. Discidia (dis) sharply triangular. Circumpedal carinae (cp) distinct, long, directed to pedotecta I.

Anogenital region — Six pairs of genital (g 1 – g 6) and one pair of aggenital (ag) setae similar in length (20 – 24), thin, indistinctly barbed. Two pairs of anal (an 1, an 2) and three pairs of adanal (ad 1 – ad 3) setae minute (2). Two setae on anterior edge of each genital plate. Adanal setae ad 3 inserted near to anal aperture, postero-laterally to adanal lyrifissures (iad). Postanal porose area (Ap) represented by one pair, which are oval (28 – 45 × 10 – 24), sometimes with protruding posterior triangle.

Legs — Claws similar in size, indistinctly barbed on dorsal sides. 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]; homology of setae and solenidia indicated in Table 1. Solenidion φ of tibiae IV inserted dorsally at about 2/3 length of segment.

Type deposition — The holotype is deposited in the collection of the Senckenberg Institution Frankfurt , Germany ; four 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 Baaeos, College, Laguna, Philippines .

Etymology — The specific name " lagunaensis " refers to the Philippine Province origin, Laguna.

Comparison — Notogalumna lagunaensis n. sp. is morphologically most similar to N. africana Mahunka, 1988 , but differs from the latter by the smaller body size (531 – 581 × 365 – 415 versus 605 – 633 × 440 – 467) and position of lamellar setae (between lamellar setae versus between lamellar and sublamellar setae). All known species of the genus Notogalumna can be distinguished by the key pre- 1989. Distribution: India and Vietnam. sented below. 6. Lamellar setae inserted between lamellar and

Key to known species of Notogalumna 1 sublamellar lines; body size: 605 – 633 × 440 –

467..................... ... N. africana Mahunka, 1988 .

1. Bothridial setae clavate; notogastral porose areas Distribution: Tanzania.

A1 of medium size, rounded..................... 2 — Lamellar setae inserted between lamellar

— Bothridial setae setiform; notogastral porose ar- lines; body size: 531 – 581 × 365 – 415

eas A1 very large, boomerang-like................ 3.................................. N. lagunaensis n. sp.

Distribution: Philippines and Vietnam.

2. Interlamellar setae flagelliform; anterior notogastral margin developed; body size: 512 × 363........................ N. hexagona (Balogh, 1960) . Distribution: Angola. ACKNOWLEDGEMENTS — Interlamellar setae represented by alveoli; ante- We cordially thank three anonymous reviewers for

rior notogastral margin not developed; body size: the valuable comments, Dr. Alexander E. Anichkin

660 × 560.................. N. floridae ( Jacot, 1929)

2

. (Institute of Ecological and Evolutionary Problems,

Distribution: U.S.A. RAS, Moscow, Russia) for sampling assistance in

Vietnam, Mr. Orlando Eusebio and Mr. Jeremy

3. Insertions of adanal setae ad 3 in preanal posi- Naredo (Museum of Natural History, University of tion; three pairs of anal setae; body size: 720 × the Philippines Los Baaeos, College, Laguna, Philip- 490........................ N. praetiosa Sellnick, 1959 . pines) for facilitating transmittal of the specimens Distribution: Polynesia, India and Borneo. to Russia. This study was supported by the Rus- — Insertions of adanal setae ad 3 in paraanal posi- sian Foundation for Basic Research (projects: 14-04- tion; two pairs of anal setae...................... 4 31183 mol_a and 15-04-02706 A) and Russian Science Foundation (project: 14-14-01134).

4. Alveoli of notogastral setae c located posterior to medial transverse groove on pteromorphs; in- REFERENCES sertions of adanal setae ad 3 distanced from anal plates.............................................5 Balakrishnan M.M. 1989 — Three new species of Oribatei — Alveoli of notogastral setae c located anterior to from Kerala, India — Ind. Journ. Acarol., 10(1-2): 23- 29.

medial transverse groove on pteromorphs; insertions of adanal setae ad 3 near to anal plates....... 6 Balogh J. 1960 — Oribates ( Acari ) nouveaux d’Angola et du Congo Belge (2Łme sØrie) — Comp. Diam. Angola,

Lisboa, 51: 15-40.

5. Bothridial setae long, reaching the medial trans- de Moraes J., Franklin E., de Morais J.W., de Pereira verse groove on pteromorphs; anterior edges of de Souza J.L. 2011 — Species diversity of edaphic genital plates with two setae; body size: 459 – 548 mites ( Acari : Oribatida ) and effects of topography, × 332 – 446...... N. nortoni Ramani and Haq, 1990 . soil properties and litter gradients on their 2 qualitative and quantative composition in 64 km of forest

Distribution: India. in Amazonia — Exp. and Appl. Acarol., 55(1): 39-63.

— Bothridial setae of medium size, not reaching the doi:10.1007/s10493-011-9451-7 medial transverse groove on pteromorphs; anterior Ermilov S.G., Martens J., Tolstikov A. V. 2014 — The edges of genital plates with three setae; body size: genus Galumna in Nepalese oribatid mite fauna, with 600 – 680 × 400 – 480..... N. foveolata Balakrishnan , notes on systematic placement of some species ( Acari , 1 Notogamumna truncata ( Warburton, 1912) from the Seychelles was very poorly described by Warburton (1912), therefore we did not include this species in the key 2 See also Jacot (1935)

Oribatida , Galumnidae ) — ZooKeys, 438: 33-44.

doi:10.3897/zookeys.438.8192

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Norton R.A., Behan-Pelletier V.M. 2009 — Oribatida. Chapter 15. In: G.W. Krantz and D.E. Walter (eds.). A Manual of Acarology — Texas Tech Univ. Press, Lubbock, 430-564.

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Subías L.S. 2004 — Listado sistemAEtico, sinonímico y biogeogrAEfico de los AEcaros oribAEtidos (Acariformes: Oribatida) del mundo (excepto fósiles) — Graellsia, 60 (noemero extraordinario): 3-305. Online version accessed in March 2015, 587 pp.

Warburton C. 1912 — The Percy Sladen Trust Expedition to the Indian Ocean in 1905. XX. The Acarina of the Seychelles — Trans. Lin. Soc. London, 2nd ser., Zool., 15: 349-360.

Figures

FIGURE 1: Notogalumna lagunaensis n. sp.: dorsal view. Scale bar 100 µm.

FIGURE 2: Notogalumna lagunaensis n. sp.: ventral view (legs not illustrated). Scale bar 100 µm.