New record of Longidorus raskii Lamberti, Agostinelli 1993 (nematoda: Dorylaimida) in Serbia

Abstract

A population of Longidorus raskii Lamberti et Agostinelli, 1993, from Mojince, Eastern Serbia, is briefly described and illustrated. Female habitus as single spiral when killed, body medium sized, tapering, gradually towards the anterior extremity. Cutucle finely striated, ca 2 μm thick along body, except et vulval region (ca 3,5 μm, and tail, where is ca 4,5 μm thick. Glandular stuctures not evident in the leteral chords. Lip region continuons with the rest of the body, ca 5 μm high. Amphidial pouches symmericaly bilobed. Odontostyle, odontophore and guide ring typical of the genus. Pharynx dorylaimoid, with basal bulb, occupying 1/3 to 1/4 of total length. Muscular bulb measuring 135 to 170 μm long and 18-20 μm wide. It contains three glandural nuclei, one dorsal and two subventral. Oesophagael - intestinal valve conical or irregural in shape. Vulva equatorial, slit like; vagina occupying about ½ of the corresponding body diameter. Reproductive system amphidelphic with more or less equally developed genital branches, ovaries opposed, reflexed with uteri 200 to 250 μm long; prerectum as long as 3-5 times the anal body width. Rectum as long as 0,7-1,5 the body width. Tail short, hemispherical, bluntly rounded, bearing three caudal pores on each side. Males frequent, with posterior region of the body more coiled than in the female. Testes well developed and apparently functional. Spicules robust ventrally arcuate; guiding pieces enlarged. The adanal pair of supplements i preceded by a row of 10-13 ventromedian supplements. Tail dorsally convex, with bluntly rounded terminus, ventrally deeply concave, bearing three caudal papillae on each side. Juveniles separeted into four juvenile develompment stages. Their posture is more or less ventrally arcute to form J shape in the first and second stages to an more or less open C, in the third and the fourth stages. In all juvenile stages tail is blunthy rounded. The code for this population the polytomons key of Chen et al. (1997) is: A 3/4, B 2/3, C 3, D1, E 2, F 3/4, G 1/2, H 1, J2.

Kopljasta nematoda Longidorus raskii Lamberti et Agostinelli, 1993 utvrđena je u još jednom staništu u Srbiji, u mestu Mojince kod Dimitrovgrada. Prvi njen nalaz vezan je za stanište u Topčideru, dok se osnovni opis ove vrste bazira na materijalu iz kolekcije nematoda u Devisu, Kalifornija, koji je 32 godine ranije prikupljen u okolini Lozane u Švajcarskoj. Staništa u kojima je u Srbiji utvrđena ova vrsta predstavljaju nenarušene travne zajednice u sloju do 30 cm dubine. U lokalitetu Mоjince L. raskii se često nalazi u mešanoj populaciji sa L. elongatus (De man, 1876; Thorne & Swanger, 1936) ili sa L. leptocephalus Hooper, 1961.