Dorylaimus varicaudatus, Thorne, 1929

Thorne, Gerald, 1929, Nematodes from the Summit of Long's Peak, Colorado, Transactions of the American Microscopical Society 48 (2), pp. 181-181 : 183-184

Dorylaimus varicaudatus n. sp.

Diagnosis:

Characters probably nearest to Dorylaimus obtusicaudatus Bastian but with these differences: Esophagus shorter. Ovaries about twice as long; eggs smaller and present in the uterus in greater numbers. Terminus of female tail variably elongated. Male preanal supplements larger but only 24-30 in number compared to about 40 in obtusicaudaíus. Spicula conspicuously long and rather slender. Males numerous while in obtusicaudatns they are rare.

The normal form of the female terminus is as shown in Fig. 3 b but occasional specimens will be found with extremes as shown in Figs. 3 c and 3 d. Immature specimens frequently are like 3 d. Posterior half of esophagus enlarged. Front ovary on the left, the rear on the right side of the body. Eggs small, only two-thirds as long as the vulva body diameter and twice as long as wide. As many as twelve may occur in the body at one time. Prerectum about equal in length to rectum. Fig. 3 a-e.

Figures

Dorylaimus varicaudatus n. sp.

Fig. 3 a-e.