. Bulletin of the Natural History Museum Zoology. WANLESS AND R. HUNTER Filenchus facultativus (Szczygiel, 1969) Raski & Geraert, 1987 (Fig. 7) Material examined. Fort Augustus Bay: 91, 3$?. Horizon. Core 2, (2-3 cm). m; cores 2, 5; Females. (n = 3).L = 515um(434-557);a = 36();b = (); c = (); c'= 13 (); V = (); V = (); tail/V-a = (); tail = 127 um (105- 142). Head about um wide at base with 2-3 annules. Amphids sinuous. Annules um () at mid body. Lateral fields with two lines. Spear slender um
. Bulletin of the Natural History Museum Zoology. WANLESS AND R. HUNTER Filenchus facultativus (Szczygiel, 1969) Raski & Geraert, 1987 (Fig. 7) Material examined. Fort Augustus Bay: 91, 3$?. Horizon. Core 2, (2-3 cm). m; cores 2, 5; Females. (n = 3).L = 515um(434-557);a = 36();b = (); c = (); c'= 13 (); V = (); V = (); tail/V-a = (); tail = 127 um (105- 142). Head about um wide at base with 2-3 annules. Amphids sinuous. Annules um () at mid body. Lateral fields with two lines. Spear slender um (n = 2) long with small basal knobs, about wide. Oesophagus um () long; median bulb ovoid, valve weak at 39^12% of oesophageal length. Excretory pore , um (n = 2) from anterior. Anterior genital branch 145 um (127-159) long. Spermatheca axial or slightly offset, elongate 23, 26 um long with rounded sperms (n = 2). Postuterine sac um long. Vagina urn long, more or less perpendicular to body axis. Tail tip pointed to finely rounded. Distribution and habitat. restrial soils. A widespread species found in ter- Remarks. F. facultativus is a variable species and these nema- todes are within the range of measurements of other populations described in the literature. However, the spear at um long is at the extreem range recorded for this species ( um.). A range of um is given by Raski & Geraert (1987) in their key to. species of Filenchus, the same range is also given by Karegar & Geraert (1988) in their summary of characters distinguishing F. facultativus from other very similar species, whereas Torres & Geraert (1996) record spear lengths of um in a population described from Argentina. Filenchus thornei (Andrassy, 1954) Andrassy, 1963 (Fig. 8) Material examined. Deep South Basin: 161 m; core 19, 19. River Foyers: m; core 40, 1 2. Foyers Plateau: 159 m; core 14, 1<J. Horizon. cm). Core 14, (2-3 cm)
Size: 1356px × 1843px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bhlconsortium, book, bookcollectionbiodiversity, bookleafnumber10
