Acta Zoologica Hungarica 37 (3-4), pp (1991) TWO NEW EUPHTHIRACAROID SPECIES (ACARI~ ORIBATIDA) FROM THE ORIENTAL REGION

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1 Acta Zoologica Hungarica 37 (3-4), pp (1991) TWO NEW EUPHTHIRACAROID SPECIES (ACARI~ ORIBATIDA) FROM THE ORIENTAL REGION W. NIEDBALA Department oj Zootaxonomy and Ecology, A. Mickiewicz University, Szamarzewskiego 91a, PL Poznan, Poland (Received 3rd November 1990) Description of two new oribatid species from the Oriental Region: Indotritia propinqua sp. n. and Austrotritia optabilis sp. n. With 23 original figures. PROF. DR. J. BALOGH(Budapest) sent me material containing two new species of Euphthiracaroidea (Acari, Oribatida). Herewith I wish to express my sincere appreciation for his kindness. Below I present the descriptions of the two mite species. Indotritia propinqua sp. n. (Figs 1-14) M e a s u r e m e n t s o f h o lot y P e (in,um) - Prodorsum: length 369, width 252, height 116, sensillus 162, interlamellar seta 111, lamellar seta 65.6, rostral seta Notogaster: length 697, height 511, seta d 85.8, hl and psl setae 90.9, genitoaggenital plate 117 X 70.7, anoadanal plate 369 X Colour brightly yellow. Integument finely porose. Longitudinal striations present in front and laterally of rostra! setae. p r o d o r s um. With two carinae, the upper one thicker, longer and reaches the end of the rostrum. Sensillus long, smooth and fi1iform. Bothridial seale dorsal to bothridium. lnterlamellar setae strongly ereet; rostral setae semi-ereet and extend beyond the margin of the rostrum. Both are rugose. Lamellar setae are more delieate and procumbent. The exobothridial setae vestigial. - N o t o g a s t er. There are 14pairs of relatively stron g and ereet normai setae, poorly rugged (CI/d-dl = 0.7). Setae d and c2 far from the anterior margin of notogaster. Seta c3 near the margin, longer and more slender. Lyrifissures ia, im, ip, ips, ih are present, as well as vestigial setae fi and f2. - V e n t r a l r e g i o n. lnfraeapitulum typically euphthiraearoid. Setae h of mentum very long. Setae m longer than setae a. Setae or positioned normally. - A n t e r i o r c a r i n a (kag) of ano-genital region well developed. Genital plates ineompletely delimited antiaxially by a distinet, long suture. The oblique eontinuation of the ano-genital cieft (trv) long. There are nine pairs 3 Acta Zool. Hung. 37, 1991 Akademiai Kiadó, Budapes&

2 206 w. NIEDBALA \\..i \~./ \ f / ry'" \...~II... /1 6 1/ 5 7 ]!I 4 3 Figs 1-7. lndotritia propinqua sp. n.: l = prodorsum, dorsal view, 2 = prodorsum, lateral view, 3 = notogaster, lateral view, 4 = seta c 1,'5 = genito-aggenital and ano-adanal regions, 6 = posterior part of ano-adanal region, 1 = mentum of infracapitulum of genital setae arranged in two groups; the four posterior pairs longer. There are two pairs of aggenital setae. - A n a l p l a t e s discrete, each with one pair of setae. Among three pairs of adanal setae ad1 smaller than ad2 and ad3, ad3 positioned anteriorally, at the level of ano-genital cieft. Adanal fissure iad posterior of seta ad2. Shallow sinus is present at the posterior end of the ventral plicature. Epimeral region with the following setal formulae: P a l p s a n d l e g s - Palps five-segmented with setal formula: and one solenidion on the tarsus as in majority of Oribotri- Ac.a ZGol. Hung

3 TWO NEW EUPHTHlRACAROID SPECIES 207 Figs lndotritia propinqua sp. n.: 8 femur of leg I, 9 = tarsus of1eg I (partly), 10 = femur of leg II, 11 = tibia of leg II, 12 = tarsus of leg U (partly), 13 = tarsus ofleg Ul, 14 = unguinal seta with claws on tarsus IV tiidae. Legs heterotridactylous. The setal and solenidial formulae (without tarsi I and II) as follows: I: 1-4-5(2)-5(1), II: 1-4-4(1)-3(1), III: 3-2-3(1)-3(1)-13(1), IV: 3-2-2(1)-3(1)-11. All coupled setae short and do not have separate integumental insertions. Femur I hooked dorsodistally. Tarsus I with distal solenidion w2 with distal coupled seta and famulus. On tarsus II hoth solenidia coupled with short setae (f t). On tarsus IV the paraxial unguinal seta thick and spiniform. The new species may he distinguished from its congeners hy the anterior position of adanal setae ad2 and ad3, especially that of ad3. It is similar to Indotritia javenensis SELLNICKsensu AOKI(1980), hut has a setiform sensilus, a longer genito-aggenital suture reaching seta g4, seta ad3 placed anteriorly, trv longer, and femur I hooked dorso-distally.. H o lot y P e and l paratype: Sri Lanka, Akuressa (Matara district), tropical rain forest, hanging moss, 3 VII 1968, leg. BALOGHet LOKsA(code CMB-B 75). Holotype deposited in the Department of Systematic Zoology and Ecology of the Eotvos Lorand University, Budapest and one paratype in the Department of AnimaI Taxonomy and Ecology. 3* Acla Zool. Hung. 37, 1991

4 W. NIEDBALA 15 _I i \ / 17 ~l /~ '-" 'O.-j \~ 19 ~ 18 ~~~ ~ ~\ 120 ~23 Figs AU$trotritia optabilis sp. n.: 15 = prodorsum, lateral view, 16 = prodorsum dorsal view, 17 = notogaster, lateral view, 18 = genito-aggenital and ano-adanal region s, 19 = infracapitulum with palp, 20 = femur of leg I, 21 = tarsus of leg I (partly), 22 = tarsus of leg II (partly), 23 = unguinal seta with claws of tarsus IV Austrotritia optabilis sp. n. (Figs 15-23) M e a s u r e ID e n t s o f h o lot y P e: (in I-LID) - Prodorsum: length 303, width 232, height 101, sensillus 101, interlamellar seta 40.4, lamellar setae 45.4, rostral setae 25.2, Notogaster: length 571, width 434, height 409, cl seta 40.4, hl 48, psl 45.4, genito-aggenital plate 151 X 85.8, ano-adanal plate 303 X Ac'" ZGol. Hung. 37, 1991

5 TWO NEW EUPHTHIRACAROID SPECIES 209 Colour brightly yeliow. Integument finely porose. p r o d o r s u m. Two lateral carinae present, lower one thinner and shorter than upper one. Bothridial scale weli developed, dorsaliy and posteriorly to bothridium. Sensillus long, stron g, smooth and tapered. Interlamellar and rostral setae erected rugose. Exobothridial setae vestigial. - N o t 0 g a s t e r. Fourteen pairs of notogastral setae (not including vestigial setae fi andf2)of short length, thin and smooth. Setae ci and e2 far from anterior margin of notogaster, seta e3 longer and near to anterior margin. Seta e2 place d very low. Lyrifissures ia, im, ip, ipsl, ih present. Latero-opisthosomal gland (gla), lyrifissure ip and vestigial seta J2 closely associated. Vestigial seta fi between setae ej and hl. -- V e n t r a l r e g i o n. Epimeral setation: The infracapitulum, palp and chelicera typical for the genus. Setae a, m, and h long and smooth, with m >h >a in length. Palp five-segmented with setal formula: (1). Genital setae in two groups, gl-g5 and g6-g9. The distances between the setae g6-g9 unequal. Seta g9 positioned at the posterior end of the plate. Two pairs of aggenital setae present, ag2 longer than seta agi. One pair of anal setae and three pairs of adanal setae present, ad2 longer than adl and ad3. Adanal fissure iad between ad2 and ad3. L e g s. AlI tarsi tridactylous. Setal and solenidial formulae (without tarsi I and II) as foliows: I: 1-4-5(2)-5(1), II: 1-4-4(1)-3(1), III: 3-2-3(1)-3(1)-3(1)-14, IV:3-2-2(1)-3(1)1-11. With the major exception of the ventral position of seta e2 on the notogaster, A. optablis sp. n. is most similar to A. uniearinata (AOKI, 1980), but it is easily distinguished by the two prodorsal carinae, the great distance between rostral setae and different setal formulae of legs. H o lot y P e and l paratype: Sri Lanka, Yala, 2 VII 1968, galery forest, dry litter, 2 VII 196B,leg. BALOGHet LOKsA(code CMB-B 68). Holotype is deposited in the Department of Systematic Zoology and Ecology of the Eotvos Lorand University, Budapest and one paratype in the Department of Animai Taxonomy and Ecology, Poznan. REFERENCE AOKI,J. (1980): A revision of the oribatid mites of Japan, I. The families Phthiracaridae Oribotritiidae. - Buli. Ins. Envir. Sci. Tech. (Yokohama) 6 (2): and Acta Zool. Hang. 37, 1991

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