21 6 
A. A. SANDOSHAM 
Setaria thomasi n. sp. from a wild pig. 
Five female and three male worms were obtained from the peritoneal cavity of a wild boar 
( Sus scrofa jubatus Miller) shot in Kelantan, Pahang, Malaya by Mr. P. V. Thomas, Veterinary 
Officer, after whom it is named. These worms are referrable to the genus Setaria Viborg, 1795 
and are considered to represent a new species. 
Description (Figs. 4 and 5) 
The body is filiform tapering towards the posterior extremity which is twisted into a loose spiral 
especially in the females. The anterior end is rounded, the mouth being surrounded by a thick oval 
chitinous “peribuccal ring.” Four submedian cephalic papillae and a pair of smaller lateral papillae are 
seen. Cuticular striations are not evident and the cervical papillae are not seen. 
The Male: The male measures from 48 to 57 mm in length and 0.4 mm in maximum thickness. 
The nerve ring is 0.22 to o 26 mm behind the anterior extremity. The anterior muscular portion of the 
oesophagus is 0.54 to 0.57 mm in length and the posterior glandular portion is 9.3 mm in length. The 
tail is 0.8 mm long and its tip is rounded. The spicules are unequal and dissimilar. The left spicule is 
longer and consists of a proximal tubular chitinous portion measuring 0.16 to 0.17 mm in length and a 
distal portion, partly membranous and partly thread-like of somewhat indeterminate length. The right 
spicule whose terminal portion is not so heavily chitinised measures 0.08 to 0.09 mm in length. 
Fourteen pairs of caudal papillae are present, seven pairs being pre-cloacal in position. The 
arrangement of the papillae is seen in Fig. 33. 
The Female: The female measures from 54 to 95 mm in length and 0.6 mm in maximum width. 
The nerve ring is 0.2 to 0.28 mm. from the anterior extremity. The anterior muscular portion of the 
oesophagus measures 0.54 to 0.62 mm in length and the posterior glandular portion 10 to 10.6 mm in 
length. The tail, which is coiled more than in the male, has a button-like tip close to which is a pair of 
small papillae. The vulva is situated at a distance of from 0.26 to 0.44 mm from the anterior end of the 
body. It leads through a muscular ovejector to a vagina which runs posteriorly into a common uterine 
trunk. The egg measures 37 by i^\x and contains a coiled larva. 
Discussion 
Thwaite (1927) gave a useful review of the species which might be assigned to the genus 
Setaria. Since then the following have been added to the list : S. tundra Issatschekow and 
Rajewsky, 1928. S. altaica Rajewsky 1928 (considered a synonym of S. cervi by Baylis), 
S. loveridgei Sandground, 1928, S. hyracis Baylis 1932, S. buxi. Bhalerao 1933 (considered 
a synonym of S. cervi by Baylis), S’, thwaitei Monnig 1933, S. sandersoni Baylis 1936, 5 . rodhaini 
Berghe and Verylsteke 1936, S. leichingwingi Chen 1937. By reason of the number and arrange- 
ment of the caudal papillae in the male, this species can be easily distinguished from the known 
species of this genus. 
It is interesting to note that so far only three other species of Setaria have been recorded 
from Suidae, namely S. congolensis Bailliet and Henry 1911 from Phacochoerus porcus in the 
French Congo, S. bernadi Railliet and Henry 1911, described by Bernard and Banche (1910) 
from the domestic pig in Annam ; and S. rodhaini Berghe and Verylsteke 1936 from 
Potomochoerus porcus in the Belgian Congo. Thwaite (1927) makes reference to the unfortunate 
absence of illustrations of 5 *. congolensis and S. bernardi accompanying the original descriptions, 
and expresses the opinion that 5 . bernardi bears a distinct resemblance to the former. 
Sandground (1933) on the basis of three males obtained from Sus cristatus from Annam 
concludes that S. bernardi is identical with S. congolensis. Chatterji (1939), however, obtained 
Setaria from the domestic pig in Burma which he considers to be S. bernardi and quite distinct 
from iS. congolensis or S’. cervi. 
Family : Filar iidae 
Genus : Setaria Viborg, 1795 
Species : S. thomasi n. sp. 
Host : Sus scrofa jubatus Miller (Wild boar) 
Location : Peritoneal cavity 
Locality : Pahang, Malaya 
STUD. INST. MED. RES. 
