— 709 — 
1. Oxysomatium brevicaudatum (Zeder, 1800) Railliet & Henry, 1916 
Fusaria brevicaudata Zeder, 1800. 
Ascaris brevicaudata (Zeder, 1800) Rudolphi, 1802. 
Oxyuris brevicaudata (Zeder, 1800) Dugès, 1826, nec Dujardin, 1845. 
Ileteracis brevicaudata (Zeder, 1800) Diesing, 1861, nec Dujardin, 1845. 
Oxysorna brevicaudata (Zeder, 1800) Schneider, 1866. 
Aplecla brevicaudata (Zeder, 1800) Railliet & Henry, 1916. 
Apleclana brevicaudata (Zeder, 1800) Railliet & Henry, 1916. 
Neoxysomatium brevicaudatum (Zeder, 1800) Ballesteros-Mârquez, 1945. 
Oxysomatium longespiculum Railliet & Henry, 1916. 
Oxysorna contorlum Linstow, 1906. 
Oxysomatium contorlum (Linstow, 1906) Baylis, 1927. 
Apleclana contorta (Linstow, 1906) Yorke & Maplestone, 1926. 
Neoxysomatium contorlum (Linstow, 1906) Ballesteros-Mârquez, 1945. 
Redescription (figs. 1-2) 
Latéral alae narrow, somatic papillae not numerous. Cuticle of body with incons- 
picuous transverse striations approximately 3.5 pm apart. Oral opening triangular, lips 
large. Cephalic papillae include 6 small labial papillae and six eephalie papillae of which 
the submedian pair is markedly small. Anterior extreinity of oesophagus with three 
tooth-like projections covered with thick cuticle. 
Male ( Bufo , Deninark, 5 specimens) : Total length 5.0-6.9 mm. Length of oesophagus 
750-878 (im (pharyngeal portion 53-69 pm, posterior portion of corpus 566-666 pm, isthmus 
31-41 pm, and bulb 97-109 pm). Nerve ring 356-422 pm and excretory pore 447-563 pm 
from anterior extremitv. Tail 153-172 pm long, tapering rapidly to long pointed terminal 
portion. Anus wide, opening onto marked swelling on ventral surface. Latéral alae 
extending from about 100 pm anterior to anus to mid-region of œsophagus. Caudal 
papillae larger than somatic papillae. Posterior half of tail with two large subventral 
and two large subdorsal pairs of papillae ; subventral pairs often not aligned directly 
opposite eachother. Anterior half of tail with three pairs of papillae ; two pairs subventral, 
one pair sublateral. Anterior lip of anus with one unpaired papilla which is supported 
by a cuticular cup-shaped structure provided with laterally directed wing-like extensions 
just below the body cuticle. Preanal région with 7-9 pairs of large caudal papillae in two 
subventral rows ; the three pairs closest to the anus are close together whereas the other 
papillae are more widely spaced. Spiculés prominent, 1.4-2.0 mm in length. Shaft of 
spiculés slender, with tubular central core and curved wing-like expansion on the ventral 
side. Proximal end of spiculé blunt, distal end sharply pointed. Gubernaculum prominent, 
113-119 pm long, with wide proximal end and sharply pointed distal end. 
Female (5 specimens) : Total length 6.3-8.2 mm. Length of œsophagus 882-1 154 pm 
(pharyngeal portion 59-72 pm, posterior portion of corpus 691-913 pm, isthmus 34-41 pm, 
and bulb 109-128 pm). Nerve ring 400-484 pm, excretory pore 513-669 pm, and vulva 
3.5-4.5 mm from anterior extremity. Vagina approximately 1.5 mm long, slender and 
3, 7 
Source : MNHN, Paris 
