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Studies on Indian mites (Acarina:Mesostigmata)S. K. Bhattacharyya aa Zoological Survey of India, Calcutta, IndiaPublished online: 14 May 2012.
To cite this article: S. K. Bhattacharyya (1972): Studies on Indian mites (Acarina:Mesostigmata), Oriental Insects, 6:2, 205-215
To link to this article: http://dx.doi.org/10.1080/00305316.1972.10434071
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Vol. 6 (l) : lOS-llS ORIENTAL INSECfS Aprfl 1972
STUDIES ON INDIAN MITES (ACARINA: MESOSTIGMATA) 11. THREE NEW SPECIES AND Two NEW RECORDS FROM
BOTANICAL GARDEN, SHILLONG
S. K. Dhattacbaryya
Zoological Survey o/India. Calcutta. India
Five species of mites are described and figured. three of which are new to science: Parasilus shlllongensis. sp. nov., Parasltus assamensls. sp. nov. and Antettnoseius indicus, sp. nov. The remaining two species. Pergamasus (Pergamasus) prlmltlvus (Oudemans, 1904) and Ve/gala uncala Farrier. 1957. are recorded for the first time from India.
Type species are deposited in the collection of the Zoological Survey of India, Calcutta.
Family PARASJTJDAE Oudemans
Genus Parasitus Latreille
1. Parasitus sbfJIoogcns's, sp. nov.
Female,' Dorsal shield 0.765 mm long, 0.396 mm wide. scleroti:z:ed. reticulate. Anterior dorsal shield bearing 22 pairs of setae and posterior dorsal shield with 26 pairs of setae (Fig. J).
Tritosternum with a long basal part and a pair of pilose Jaciniae. Two pairs of pre-endopodal shields present. Sternal shield reticulate, with 3 pairs of setae. Each meta sternal shield large and carrying a seta. Genital shield somewhat triangular and bearing a pair of setae. Genital region shown in fig. 2. Opisthogastric shield reticulate. with 19 setae (Fig. 3), Stigma situated between coxae III nnd IV; peritreme extending to level of coxa I. Posterior extremity of peritrematal shield curves inwards in a tubular form to meet coxa IV.
Tectum three-pronged (Fig. 4). Trochanter and femur of pedipaJp with 2 and 5 setae respectively. Genu with 6 setae and 2 of which spatulate; apoteJe tbree-pronged. Chelicera of unique specimen not examined. Ventrally, gnatbosoma with 4 pairs of setae; about lateral half of hypostomal processes fringed; ten rows of deutosternal dentic1es present. Each of 4 pairs of Jegs with an ambulacrum.
Male,' Dorsal shield 0.771 mm long. 0.378 mm wide, sclerotized. reticulate and with a transverse suture. Anterior dorsal shield bearing 22 pales of
Published AUBust 1912
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206 ORIENTAL iNSECTS Vol. 6, No, 2
1
Figs. 1·4. Para:ritullhillongensls, sp. nov., female: I, dorsum; 2, magni· fled structure of sterniti-genital region; 3, venter; 4, tectum.
setae and an unpaired seta present near transverse suture, whilst posterior dorsal shield with 27 pairs of setae (Fig. S).
Tritosternum with a basal part and a pair of pilose laciniae. Pre·endopodal sbields not seen in the specimen examined. Chaetotactic pattern of holoventral shield shown in fig. 6. Stigma situated between coxae III and IV; peritreme
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1972 nUATTACUARYYA : ON INDIAN MiTES
5
Figs. '·8. Parasltus shilfongensls. 5p. nov., male: S, dorsum; 6, venter; 7, chelicera; 8, femur, genu and tibia of leg II.
207
extending to coxa J. Post-stigmatal extension of peritrematal shield reaching to coxa IV.
PedipaJp as in female. Corniculus starked. Fixed digit of chelicera multi· dentate and movable digit un identate (Fig. 7). Distinctive features of femur. genu and tibia of leg II shown in fiSt 8.
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208 ORIENTAL INSECTS Vol. 6. No.2
Ilolotype ~. from leaf litter of Alnus nepalensis Don .• INDIA: Assam. Botanical Garden, Shillong. United Khasi and Jaintia HiUs District, 4.xii.1969. S.K. Bhattacharyya. Allotype~. from leaf litter. Botanical Garden. Shillong. United Khasi and Jaintia Hills District. 4.xii.1969, S. K. Bh;lttacharyya.
Remarks : The genital region in the female and the distinctive shape of spurs of femur, genu and tibia of leg II in the male separate this species from the other in the genus.
2. Parasitus assamensls. sp. nov.
Female: Dorsal shield'O.738 mm long. 0.324 mm wide. moderately scleratized. partly reticulate and with a transverse suture. Chaetotaxy of dorsal shield as in fig. 9.
Tritosternum with a pair of pilose laciniae. A pair of pre-endopodal shields present. Sternal shield reticulate. with 3 pairs of setae. Metasternal shield large and each bearing a seta. Genital shield reticulate, with a pair of -setae. Endogynial processes present (Fig. 10). Opisthogastric shield reticulate
9 10
Fiis.9·11. Parasllu$'assamensl,. Ip. nov., female: 9, dorsum; 10. venter; 11, tectum.
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1972 BIIATTACUARYYA : ON lNDIAN MITES 209
and carrying 19 setae (including a pair of par- and a post·anal setae). Stigma situated between coxae HI and IV; peritreme not extending to coxa 1. Post-stigmatal extension of peritrematal shield reaching coxa IV.
Tectum three-pronged (Fig. 11). Trochanter and femur ofpedipalp with 2 and 5 setae respectively; genu with 6 setae and 2 of which spatulate. Apotele three-pronged. Chelicera not examined. Gnathosoma with 4 pairs of setae. Enljre hypostoma) processes fringed. Venlral groove ofgnathosoma with 7 rows deutosternal denticles.
Each of 4 pairs of legs with 2 claws and a pulvillus. Male: Unknown. Ho!otype ~. from litter and soil under A.lnus nepalensls Don., INOlA: Assam.
Botanical Garden, Shillong, United Khasi and Jaintia Hills District, 4.xii. 1 969, S. K. Bhattacharyya.
Genus Pcrgamasus Derlese
3. Pergamasus (Pergamasus) primillrus (Oudemans, 1904)
. Female: Dorsal shield 1.035 mm long, 0.576 mm wide. oval, sclerotized. Opjslhonotal shield densely covered with setae, neotricholls (Fig. 12).
Tritosternum with a basal part and a pair of pilose laciniae. Two pairs of pre-endopodaJ shieJds present. Sternal shield reticulate, with 3 pairs of setae. Metasternal shields free and each with a seta (Fig. (3). Genital shield reU· culate and bearing a pair of setae. Endogynial process shown in fig. 14. OpislllOgastric shield reticulate, with variable number of setae. Stigma situated between coxae In and IV; peritreme extending to coxa I. Posterior extremity of peritrematal shield curves inwards in a tubular form to meet coxa IV. .
Tectum as in fig. 15. Dentition of chelicera s~own in tig. 16. One seta each on internal face of trochanter and femur and 2 setae on internal face of genu of pedipalp comb-like. Gnathosoma with 4 pairs of setae. Lateral (outer) margin of bypostomal process fringed. Ventral groove of gnathosoma bearing 10 rows of deutosternal denticles.
Each of 4 pairs of legs wilh an ambulacrum. Male,' Dorsal shield 0.846·0.900 mm. long. 0.468 mm. wide, weH Bele
rotized, regionally reticulated and without a transverse suture. Opisthonotal shield densely covered with setae, neotrichous.
Tritoslernum present. Pre-endopodal shield flanking genital sclerite. Genital lamina with a median incision. Chaetotaxy of venter as in fig. 17. Sti&ma situated between eoxae III and IV; peritreme anteriorly extending to coxa I. Post-stigmatal extension of peritrematal shield reaching to coxa IV.
Tectum as fig. 18. Distinctivo features of femur and genu of pedipalp shown in fig. 19. Chelicera as in fig. 20, Onathosoma with 4 pairs of setae. Corni·
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210 ORIENTAL INSECTS Vol. 6, No.2
14 figs. 12-16. Periamasul (Perlamasus) prlmlllvul (Oudemans),
female: 12, dorsum: 13, venter; 14, cndogynial process; IS, tectum; 16, chelicera.
(lulus stalked., Entire lateral margins of hypostoma) processes fringed. Ventral groove of gna'thosoma bearing 10 rows of deutosternal denticles.
Leg I with ambulacrum. Femur, genu and tibia of leg II with spurs (Fig. 21.)
Materfd{;' 1~. 2c!c!, from leaf litter of Alnus nepalensls Don., INDIA: Assam. Botanical Garden, ShilJong, United Khasi and Jaintia Hills District, 4.xii.1969.
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1970 DHATTACHARYYA : ON INDIAN MITES
21 Figs. 17·21. PerzamaslIJ (Perzamasur) prlmitivus (Oudemans),
male: 17, venter; 18, tectum; 19, femur and genu ofpedipalp; 20, chelicera: 21, femur. genu and tibia of leg n.
211
S. K. Dhattacharyya. 1~. from leaf litter. Dotanical Garden, Shillong. United Khasi and laintia Hills District. 4.xii.1969, S. K. Dhattacharyya.
Distribution: This species has previously been recorded from lava (Derlese, 1905), Drazil and French Guiana (Heim and Oudemans. 1906), Datavia and Tjibodas (Vitzthum. 1926), and Australia (Womersley, 1956).
Family VEIOAUDAB Oudemans
Genus·Veigaia Oudemans
4. Velgara uneata Farrier, 1957
Female: Dorsal shield 0.855 mm long. 0.558 mm wide, joined medially, incisions wide laterally and curving strongly backward to acuminate point$
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212 ORIENTAL INSECTS Vol. 6, No.2
J
25
23
\.....
24
27 Figs. 22·21. Velgola untota Farrier, female: 22, dorsum; 23, venter; 24, tectum;
lS, chelicera; 26, gnathosoma; 27, trochanter and femur of leg IV.
(Fig. 22). Region anterior to incisions with 23 pairs of setae and posterior to incisions with 19 pairs of setae. Setae it, i3. z2 and rS long and stout; it being slightly pilose. Setae il 0.068 mm, 81 0.012 mm, i2 0.036 mm, 130.088-0.092 mm, 140.028 mm, z2 0.124 mm, rS 0.152-0.160 mm. long.
Tritosternum with a long and slender basal part and a pair of pilose laciniae. Two pairs of pre-endopodal shields present. Sternal shield reticulate with 3 pairs 6fsetae. Ventral interscutal membrane with 1'2 setae on one side, 10 on tile other. Metasternal shield targe, with a seta. Ventral shield fused laterally
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1972 &HATTACUARYYA : ON INDIAN MITES 213
with epigyniaJ shield but not fused laterally with peritrematal shield. Puncti .. form organ with 14 pits. Chaetotaxy of ventral shield as in fig. 23. Distance from V2 to V2 0.116 mm, V3-V3 0.128 mm. Anal shield with a pair of parand a post-anal setae. Stigma situated between coxae III and IV; peritreme extending to well beyond coxa I. Post-stigmatal extension of peritrematal shield present. '
Tectum as in fig. 24. Palpa\ trochanter, femur and genu with 2, Sand 6 setae respectively. Medial seta of femur of pedipalp widened; anteromedia~ and posteromedial setae of genu spatulate. Pal pal tarsus with a three-pronged seta and a leaf-like process. Chelicera as ,in fig. 25.' Gnathosoma with 4 pair of setae. Hypostomal process as in fig. 26.
Each of 4 pairs of legs with an ambulacrum. Trochanter and femur of leg IV delineated in fig. 27.
Mater/al: 1~, from litter of Alnui nepalensis Don., JND~A : Assam, Botanical Garden, ShiUong, United Khasi and Jaintia Hills District. 4.xii.1969, S. K. Bhattacharyya. 1~, from soil under leaf litter of Ficus sp .• Dotanical Garden. ShiIlong, United Khasi and Jaintia Hills District, 4 xii.I969, S. K. Dhattacharyya.
Distribution: This species has previously been recorded from U.S.A .• Mexico ,Guatemala, Costa Rica (Farrier, 1957) and U.S.S.R. (Dregetova, 1961).
Remarks: This is the tirst record of the species from India.
Family ASClDAE Voigts and Oudemans
Genus Antennoselu9 Derlese
5. AntcnnoseIu5 IndIcu5, sp. nov.
Female: Dorsal shield with granular reticulation and completely divided into 2 shield, (Fig. 28). Anterior dorsal shield 0.324 mm long, 0.342 mm wide, bearing 21 pairs of pilose setae (Fig. 30) and a pair of palmate setae (Fig. 29). Posterior dorsal shield 0.279 mm long. 0.315 mm wide, with 15 pairs of pilose setae.
Tritosternum with a pair of pilose lacin{ae. A pair of pre·endopodal shield present. First pair of sternal setae lying on interscutal memb,·ane. Sternal shield with 2 pairs of setae and pattern of reticulation shown in fig. 31. Metasternal setae situated on integument, level approximately with middle of coxae III. Genital shield round posteriorly. with It pair of setae. Ventri·anal shield reticulate, granular and bearing 5 setae. Stigma level with middle of coxa IV; peritreme extendin,g to coxa t. Peritrematal shield broad (Fig. 32). strongly united to dorsal shield anteriorly, somewhat rounded posteriorly.
Tectum as in fig. 33. PalpaJ trochanter. femur and genu with 2. Sand 6 setae respectively; apotele two-pronged. Gnathosoma with 4 pairs of setae. Corniculus conicle. Fringe of hypostomal processes not distinguishable.
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214 OklENTAt. INSECTs Vol. 6, No.2
t ~ ,.Wlt ........... "~ 33
29
I , ~ 30
28 31 32 Figs, 28-3S. Anfennoaelua Indicua, sp. nov., female: 28, dorsum; 29, vertical
seta; 30, pilose seta; 31, sternal region; 32, peritrematal shield; 33, tectum; 34, chelicera; 3', trochanter of leg J.
Ventral groove of gnathosoma with 7 rows of deutosternal denticles. Fixed digit of chelicera unidentate, movable digit bidentate and with a pointed ventral projection near base (Fig. 34).
The presence or absence of ambulacrum on leg I cannot be ascertained as one leg is broken otT and the other is with a pedicel only. Trochanter (Fig, 35) and femur of leg I with one spine-like seta,
llolotype !?, from leaf litter. INDIA: Assam. Botanical Garden, Shillong. United Khasi and Jaintia 1Ji1ls District, 4.xii.1969. S.K. Dhattacharyyn.
Remarks: A. indicus, sp. nov. resembles A. bullllliS Karg. 1965, mainly in the distinctive shape of vertical setae but difTers from the complement of Setae on the dorsal shields, the size of pre-endopodal shields, tbe chaetotaxy and reticulation of the sternal shield, the presence of ventr;·anal shield, and the dentition of the chelicera.
The seDus is reported for th~ first time from Indin.
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1972 nlJATtAcIlARVYA : ON INDIAN MITES 215
ACKNOWLEDGMENT. I am grateful to Mr. D. Macfarlane, Commonwealth Institute of Entomology. London, for sending a list of species of Anlennoseius and much useful information. .
REFERENCES ·nER.LESI!, A. J905. Acari Nuovi. Manipulus IV. Acari di Giava. Redia 2 (1904): 154·
176.
nREOETOVA, N. G. 1961. The veigaiaid mites (Gamasoidea. Veigaiaidae) in the USSR. Parazil Sh. 20: 1()'107.
FARRIER, M. 1957. A revision of the Veigaiidae (Acarina). N. C. Agr/c. Expl. Sla. Tech. Bull. 124: 1~103.
HElM. F. and OUDEMANS, A. 1906. Nouvelle espece du genre Pergamasus Berlese (Acari) originaire de la Guyane et du Bresil. Annl". Soc. ent. Fr. 75: "-62.
KARO. W. 1969. Untersuchungen zur Kenntnis der Ascaoidea Karg, 1965 (Acarina, Parasi. tiformes) mit der Beschreibung von acht neuen Arten. Zool. Anz. J81 (5/6) : 393-406.
·OUDEMANS: A. C. 1904. Acarologische Aanteekeningen No. 10. Enl. Ber., Amst. 1 (16): 140.
VITZTHUM. G. H. 1926. Malayische Acari. Trel/bla 8: 1-198.
Womersley. U. 1956. Some additions to the Acarina-M>!$ostigmlta vi Australia. THms. R. Soc. S. Ausl. 79: 104·120
(·Not seen in original)
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