— 716 — 
Nerve ring 320 (un, excretory pore 453 pm, and vulva 2.8 mm from anterior extremity. 
Ovary of posterior utérus located anterior to vulva, terminal half of ovary of anterior utérus 
located posterior to vulva. Eggs oval, thin-shelled, 69-78 pm long and 40-45 p.m wide (based 
on five specimens). Latéral alae extending from anterior third of tail to mid-region of œso- 
phagus. Tail 208 pm long, conical, sharply pointed, with slight swelling near posterior lip 
of anus. 
Paralypes : Dimensions of 5 male and 4 female paratypes are as follows. Males : 
4.2-5.1 mm long; œsophagus 622-724 pm long (pharyngeal portion 48-65 pm, posterior 
portion of corpus 443-530 pm, isthmus 39-45 pm, bull» 87-96 pm) ; nerve ring 287-315 pm, 
excretory pore 410-475 pm from anterior extremity ; spiculés 183-208 pm, gubernaculuin 
75-86 pm, and tail 134-156 pm long. Females : 4.7-5.0 mm long ; œsophagus 738-767 pm 
long (pharyngeal portion 56-65 pm, posterior portion of corpus 530-545 pm, isthmus 37- 
60 pm, bull» 105-112 pm) ; nerve ring 275-335 pm, excretory pore 440-462 pm, and vulva 
2.5-2.9 mm from anterior extremity ; tail 186-220 pm long. 
Specimens examined : (1) MNHN 1090 BA (type specimens from Bufo mauritanicus ). (2) 
MNHN 492 A ( D. pictus). 
Locality : The type locality is Casablanca, Morocco. Ail specimens were from there. 
Hosts : Bufo mauritanicus, Discoglossus pictus. 
Discussion 
O. dollfusi n. sp. can be most easily differentiated from the other two species in the 
genus by spiculé morphology and length. In both O. caucasicum and O. brevicaudatum 
the spiculés are relatively long (> 350 pm) whereas in O. dollfusi they are less than 225 pm 
in length. The spiculé shaft in O. dollfusi forms a robust anterior portion and a less heavily 
chitinized posterior portion which is surrounded by a wide transparent membrane. In 
the other two species the shaft of the spiculés is uniform in appearance throughout its 
length and it is greatly elongated. The membranous sheath observed around the posterior 
two-thirds of the shaft in O. dollfusi surrounds almost the entire length of the shaft in 
O. breoicaudalum and O. caucasicum. Finally, the spiculés in 0. dollfusi are bent into a 
characteristic hook shape in latéral view whereas they are slightly curved or variable in 
shape in the other two species. 
Other species assigned to Oxysomatium 
A number of species described originally under the generic name Oxysomatium were 
subsequently transferred to other généra i.e. Apleclana chamaeleonis (Baylis, 1929) Tra- 
vassos, 1931 ; Apleclana hylambatis (Baylis, 1927) Travassos, 1931 ; Aplectana bonariensis 
(Gutierrez, 1945) Lent & Freitas, 1948 ; Aplectana mexicana (Caballero, 1933) Ballesteros- 
Mârquez, 1945 ; Falcaustra inglisi (Anderson, 1964) Baker, 1980. The présent studv 
confirms these changes. Oxysomatium ranae Walton, 1941, and Oxysomatium georgianum 
Reiber, Byrd & Parker, 1940, belong in Aplectana as will be discussed in a separate publi¬ 
cation. Similarly, Oxysomatium srinagarensis Fotedar, 1960 ; Oxysomatium anurae Bis- 
Source : MNHN, Paris 
