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Nematoda : Dorylaimida) from India Two new speciesof the genus Trichodorus Cobb, 1913 (Nematoda : Dorylaimida) from India M. Farooque RAHMAN*, M. Shamim JAIRAJPUFCI and Irfan AHMAD Section of Nenlatolog); Departfnent of Zoology, Aligarh Muslim University, Aligarh - 202001, India. SUMMARY Two new species of Tnkhodonrs are described and figured from the North-eastem states of India. Trichodorus borain. sp. cornes close to r califomicus Allen, 1957, i? cottien’clark, 1963, T. dilatatusRodriguez-M & Bell, 1978, T. ebumeusDe Waele & Carbonell, 1983, T. elegans Allen, 1957, T. intennedius Rodriguez-M & Bell, 1978 and T. proxintus Allen, 1957 in having only one cervical papilla but differs from them in the position of this papilla and size of spicules. T. comnplexus n. sp. cornes close to 1: bomeoensis Hooper, 1962, T. taylori De Waele, Mancini, Roca & Lamberti, 1982 and T. orientalis De Waele & Hashim, 1984 in having two cervical papillae and striated spicules. However, it differs from them in having a smaller onchiostyle, in the size and shape of spicules and vulval sclerotization. RESUME Deux nouvelles espècesdu genre Trichodorus Cobb, 1913 (Newatoda : Doylaimida) provenant de l’Inde Deux nouvelles espices de Trichodorus provenant des États du Nord-Est de l’Inde sont décrites et illustrées. Trichodorus borai n. sp. est proche de T. califomicus Allen, 1957, T. cottiericlark, 1963, T. dilatatus Rodriguez-M & Bell, 1978 T. ebumeus De Waele & Carbone& 1983, T elegans Allen, 1957, T intennedius Rodrigue2 M & Bell, 1978 et X pruximtcs Allen, 1957 par la présence d’une seule papille cervicale, mais diffère de ces espèces par la position de cette papille et la taille des spicules. i? complexus n. sp. est proche de T. bomeoensis Hooper, 1982, r tayZoriDe Waele & Mancini, Roca & Lambert& 1982 et T. orientalisDe Waele & Hashim, 1984 par la présence de deux papilles cervicales et de spicules striés; cependant T. comnplexus diffère de ces espèces par un onchiostyle plus court, la taille et la forme des spicules, ainsi que par la sclérotisation vulvaire. Soi1 samples collected from the North-eastem states MaZes(paratypes; n = 6) : L = 0.56 mm (0.49-0.60); of India yielded two new species of Tn’chodorus which a = 22 (21-26); b = 4.5 (4.1-4.8); c = 54 (47-60); are described below. The specimens were fiied in hot T = 64 (59-66); onchiostyle = 50 prn (48-51); oeso- 4 %I formalin and processed to anhydrous glycerine by phagus = 125 p (112-129); spicules = 29 prn the slow method. (27-33); gubernaculum = 14 prn (13-15). Holotype (male) : L = 0.61 mm; a = 22; b = 5.0; c = 67; T = 68; onchiostyle = 50 prn; oesopha- Trichodorus borai** n. sp. gus = 122 prn; spicules = 29 pm; gubemaculum = (Fig. 1) 14 prn. MEASUREMENTS DESCRIPTION Females (paratypes; n=7): L = 0.60 mm (0.54-0.63); a = 22 (21-24); b = 4.8 (4.1-5.3); c = 111 Male : Body upon fixation slightly ventrally curved (91-122); V = 57 (56-58); G, = 20 (18-22); Gz = 20 with greater curvature in posterior part, tapering gra- (18-22); onchiostyle = 49 prn (46-51); oesophagus = dually from middle of oesophagus to anterior extremity. 124 prn (118-134). Cuticle in two layers, inner cuticle fïnely striated, 2-3 prn thick on mid-body and 5 prn on tail. Lateral chords about 1/3 of mid-body width. Lip region almost conti- nuous with body contour, 8-9 ,um or about 113 of body ** After Dr. Prafulla Chandra Bora, Dean, Faculty of Agricul- width wide and 4 prn or half of its own width high, labial ture, Assam Agricultural University, Jorhat, Assam, India. papillae slightly raised. Amphids vase-shaped with ellip- * Present Address : Department of Zoology and Entomology, Assam Agricultural Univers& Jorhat - 785013, Assam, India. Revue Nématol., 8 (2) : 103-107 (1985) 103 Two new species of the genusTrichodorus Cobb, 1913 from India soidal apertures 4-5 um across, sensillar potiches spin- guez-M & Bell, 1978, î: eburneus De Waele & Carbo- dle-shaped, about 12 l.un behind amphid apertures. nell, 1983, T. elegans Allen, 1957, T. intermedius Ro- Stoma tubular, 18-20 urn long. Onchiostyle slender, driguez-M & Bell, 1978 and T. proximus Allen, 1957 in about six lip regions widths long, its anterior portion having only one cervical papilla but differs from them 18-21 urn or as long as stoma. Oesophagus 2-3 prn wide in having this papilla located in the onchiostyle region in front of nerve ring, its pyriform basa1bulb 10-15 um and smaller spicules. wide and joins intestine without an overlap. Dorsal and second pair of ventrosublateral oesophageal gland nuclei prominent. First pair of ventrosublateral gland Trichodorus complexus n. sp. nuclei indistinct. Nerve ring 63-68 prn from anterior end. A single ventromedian cervical papilla opposite (Fig. 2) posterior half of onchiostyle, 39-53 um from anterior MEASUREMENTS end of body and 22-29 pm anterior to excretory pore. A pair of lateral cervical pores present just behind base of Females : (paratypes; n= 3): L = 0.70 mm onchiostyle. Excretory pore at level of nerve ring or (0.66-0.77); a = 22.4 (22-23); b = 4.8 (4.2-5.5); slightly behind, 68-75 um from anterior extremity. Spi- V = 54.5 (53-56); GI = 21 (20-22); Gz = 22.4 (22-23); cule arcuate, broadened anteriorly, gradually narrowing onchiostyle = 43.6 um (42-45); oesophagus = to a pointed posterior tip and is devoid of any cons- 147.6 l.trn (140-158). triction along its entire length; gubemaculum thin and Holotype (male) : L = 0.74 mm; a = 24.6; b = 3.8; long with a keel-like thickening at distal end. Distinct c = 54.6; T = 40; onchiostyle = 45 prn; oesopha- circular and longitudinal muscles attached to the head gus = 191 um; spicule = 43 um; gubemaculum = of spicules. Ventromedian supplements three, first at 17 um. 19-24 prn or 3.5-4.3 %, second at 37-45 um or 6.8-8.0 O/O and third at 69-81 um or 13.1-14.6 % of body length from cloacal opening. A pair of ventrosubmedian posta- DESCRIPTION na1 papillae located just behind cloacal opening. Tail Male : Body upon fixation curved ventrally with irregularly rounded. greater curvature in posterior region, tapering gradually from middle of oesophagus to anterior extremity. Cuti- Female : Similar to males___ except.__.- --that ‘Y- papilla and cle consists of three layers, a thin outer smooth layer, _ cervicalpore-are-absentin-oesophageal regron. Excretory thicker middle layer and an inner finely striated layer, _-.- -- pore 68-78 lrrn from anterior end of body. Vulvar pores 4 prn thick at mid-body, 5-6 um at tail terminus. Lateral not visible. Vulva irregular pore-like. Two roughly ovoid chords about 1/3 of body width at middle. Lip region sclerotized pieces present at vulva-vagina junction. The slightly offset, labial papillae raised. Amphid apertures longitudinal axis of the sclerotized pieces oblique to ellipsoidal, 5 prn wide. Stoma tubular about 20 um long. body wall. Vagina about halfway across body appearing Onchiostyle slender, about five and a half lip region round in lateral view. Spermatheca oval, filled with widths long, its anterior portion about 23 um or slightly round sperm. Rectum 15-18 u.rn long, tail hemispheri- longer than stoma length. Oesophagus about 3 l.rm wide cal, 0.35-0.45 anal body width long and with a pair of in front. of nerve ring, 2 um at nerve ring, 6-8 prn near faintly visible caudal pores opening dorsally. Anal open- middle, pyriform basa1 12-15 um wide. No overlapping ing subterminal. of oesphagus over intestine. A conoid cardia present at oesophago-intestinal junction. Oesophageal gland nuclei ?kPEHABITATANDLOcALITY indistinct. Nerve ring 68 prn from anterior end. Two Soi1 around roots of bamboo (Bambusa SP.) from ventromedian cervical papillae 14 prn apart, situated North Lakhimpur, Assam, India. Collected in June anterior to excretory pore, first 70 l.trn and second 84 um 1981. from anterior end of body. First and second ventrome- dian cervical papillae 20 um and 6 pm respectively from -h'l='EhJATERIAL excretory pore. Lateral cervical pores not seen. Excretory pore 90 p,rn from anterior end of body. Spicules cylindri- Holotype (male) and a paratype female on slide Tri- cal, finely striated, distal half straight, proximal half chodorus borai n. SP./~; paratype males and females on dorsally convex. Gubernaculum thin and long with a slides Trichodorus borai n. SP./~-6; deposited in the slight thickening at distal end. Ventromedian supple- nematode collection of the Zoology Department, Ali- ments three, first 35 um or 4.7 %, second 65 prn or 8.8 O/o garh Muslim University, Aligarh, India. and third 103 prn or 13.9 % of body length from cloaca. A faint pair of post-cloacal papillae just behind cloacal DIAGNOSIS opening and a pair of caudal pores at tail terminus. Tail Trichodorus borai n. sp. resembles T. californicus Al- uniformly rounded, dorsally convex, ventrally slightly len, 1957, T. cottieri Clark, 1963, T. dilatatus Rodri- concave. Revue Nématol., 8 (2) : 103-107 (1985) 105 M. F. Rahman, M. S. Jairajpwi & I. Ahmad 75pm t i E w LOpm 1 I c. 0, F- H Fig. 2. Trichodorus conzplexus n. sp. A : Entire male; B : Entire female; C : Oesophageal region of male; D : Oesophageal region of female; E : Female genital branches; F : Vulvar region; G : Female posterior end; H : Male posterior end. 106 Revue Nématol., 8 (2) : 103-107 (198.5) Two new species of the genus Trichodorus Cobb, 1913from India Female :Lip region, onchiostyle and oesophagus same pieces reniform or pyriform in T. bomeoensis). From_ 2: as in male except that cervical papillae are absent.
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