Aporcelaiimus romanicus, Popovici, 1978

Popovici, Iuliana, 1978, New Nematode Species (Dorylaimoidea) From Romania, Nematologica 24 (4), pp. 404-411 : 404-406

Aporcelaimus romanicus n. sp.

( Fig. 1 , A-E)

Measurements:

Female = L = 2.93-3.56 mm; a b = c = 56.5-69.5; (n 5): = 38-41; 4.0-4.6; TT = 15-2049.5-53.515.7-2y

Male (n = 8): L = 2.75-3.54 mm; a = 36-47; b = 3.9-4.9; c = 54-71; spicules = 75-92 Ixm; lateral guiding pieces = 19-27,¡.tm.

Holotype (female):

L = 3.50 mm; a = 40; b = 4.3; c = 67.5; V = 1s.351.521. Allotype (male): L = 3.42 mm; a = 43; b = 4.5; c = 68.5.

Description

Body cylindroid, tapering anteriorly to a narrow lip region, one fifth thebody width at the base of oesophagus, slightly curved in the posteriorthirdofitslength. Cuticle thick, in two distinct layers, the outer one thinner (1 -2 gm); cuticle3.5 5 gm (2.5- 4 ¡.tm) at the odontostyle level, 7.5 Am (5.5-7.5 jAm) at mid-body and 10.5 Am (9.5-10.5 gm) on tail (measured at middle on dorsal side). The cuticle on the tail is marked by fine criss-cross lines. Lip region off-set bya deepconstriction, 16 gm wide, one third as high as wide. Odontostyle 18/ im long(17- 20¡. tm), measured on dorsal side, one and one fifth lip region width long; odontostyle ventral side 16 gm (16-1 7 gm), aperture 13.5 jAm (12.5 -16 Am). Odontophore 35,um (27.7-38 pm) long. Guiding ring plicated. Amphids stirrup-shaped, aperture 7 gm, slightly shorter than half a lip region width. Oesophagus starts widening at 40% (39-47 Jlo) of its length from the head end. Cardia conoid, about half as long as body width at the base of oesophagus. Flattened disc present between base of oesophagus and the cardia. Nerve ring at 219 gm (181 -233 [cm) from the anterior end.

Female: Reproductive system paired, distal one fourth reflexed. Vulva transverse, vagina with cuticularized pieces; extending into the body about one third of its width. Eggs 116-134 X 45-50 gm (122-134 X 47-55 Am), one and a half times the body width long. One to three eggs at a time in each uterus. Sperms present in the uteri. Rectum 1.1 (1- 1.2), prerectum 3.5 (3-4.3) times anal body diameter. Tail one (i-1.2) anal body diameter long, dorsally convex conoid, with a slightly subdigitate tip. Two pairs of caudal papillae.

Male: Spicules 88 (75- 92 lateral guiding pieces characteristic, 25 [tm long (19-27 gm). Besides an adanal pair there are eleven (10-12) well spaced ventromedian supplements, the posterior two being within the length of the spicule; the distance between the posterior one and the clocal opening is 43 ttm (42-49 distance between supplements is two to three times their width (1 5-24 gm). Tail as in female, one anal body diameter (1- 1.2) long.

Type specimens: Holotype female, allotype male, and one paratype female deposited on the same slide in "Grigore Antipa" Museum Collection, Bucharest, Romania; paratypes deposited at the following addresses: Plantenziektenkundige Dienst, Wageningen, the Netherlands; Instituut voor Dierkunde, Gent, Belgium; Rothamsted Experimental Station, Harpenden, England; Dr. I. Andr6ssy, Budapest, Hungary.

Type habitat and locality. Collected from a brown soil, basically mull-moder in a beech-spruce fir forest in Vladeasa Mountain Mass (Western Carpathians) in May-October 1974, June 1975. Additional specimens were found in the Cerna Valley, in a typical beech forest lithosol, June 1976.

Differential diagnosis: Aporcelainzu.r romanicus n. sp. comes closest to A. sublabiatus ( Thorne & Swanger, 1936) Brzeski, 1962, from which it differs in having a more slender body, a shorter tail and rectum, longer spicules and a different number and arrangement of ventromedian supplements. The new species differs also from A. subdigiticaudatus Altherr, 1965 and A. ronnebergeri Altherr, 1968, in having a shorter body, longer tail, shorter odontostyle, eggs, spicules and lateral guiding pieces, and by the different number and arrangement of ventromedian supplements.

Figures

Fig. 1, A-E. Aporcelaimusromanicus n. sp. A- Head end; B- Cardia region; C- Posterior sexual branch; D- Female tail; E - Posterior region of male.