Teratocephalus terrestris
(Butschli, 1873) de Man, 1876
Syn.: Anguillula terrestris Butschli, 1873
Photo Gallery- Long's Peak, Colorado

     This species is immediately distinguished by its small size, coarsely striated cuticle and long filiform tail with its arcuate terminus.  The head with its cutinous framework is an especially prominent feature.
     This is one of the most widely distributed species in the western mountains but occurs only in small numbers.  Two specimens appeared in this collection.

-G. Thorne, Nematodes from the summit of Long's Peak, Colorado, 1929



Female, 0.3-0.57mm; a = 26-41; b = 3-5; c = 3-6.5; V = 44
Male, 0.4mm; a = 40; b = 4; c = 5-6
Body slender, tapering a little anteriorly in both sexes and considerably posteriorly to a finely pointed tail.  Head offset, consisting of 6 flap-like lips which inarch towards the mouth aperture and are separated from one another by deep grooves.  Stoma deeper than wide, becoming funnel-shaped at its junction with the oesophagus.  Amphid apertures small and situated at about the same level as the front end of the oesophagus.  Female gonad single, prodelphic, ovary reflexed.  A post-vulval uterine sac present.  Male tail long and tapering as in the female.  Spicules ventrally arcuate, slender and proximally knobbed.  Caudal papillae absent.
(Description- Goodey, 1963)

DNA Sequences Obtained
Specimen: Collected:
RMNP LP1-25 Long's Peak, Rocky Mountain Nat'l Park