. Bulletin of the Natural History Museum Zoology. 2c. iii Fig. 2a-c Nybelinia southwelli sp. nov. a. homeomorphous basal tentacular armature, external surface, b. metabasal tentacular armature, external surface, c. basal (i), metabasal (ii) and apical (iii) tentacular hooks. Scale bar=20 urn. are wider than long and have distinct convex margins (Fig. 3a). The size of the proglottids is similar along a large part of the strobila (around 130th proglottid: 800-870 x 260-300, last proglottids: 900- 970 x 300-370). The genital atrium is ventrosubmarginal in about the middle of the proglottids and a
. Bulletin of the Natural History Museum Zoology. 2c. iii Fig. 2a-c Nybelinia southwelli sp. nov. a. homeomorphous basal tentacular armature, external surface, b. metabasal tentacular armature, external surface, c. basal (i), metabasal (ii) and apical (iii) tentacular hooks. Scale bar=20 urn. are wider than long and have distinct convex margins (Fig. 3a). The size of the proglottids is similar along a large part of the strobila (around 130th proglottid: 800-870 x 260-300, last proglottids: 900- 970 x 300-370). The genital atrium is ventrosubmarginal in about the middle of the proglottids and alternates irregularly. The cirrus sac is elongate, large, directed anteromedially from the genital atrium and the sac is thin-walled (Figs 3b-c). The cirrus is unarmed, coiled within the sac and an internal seminal vesicle was not seen; external seminal vesicle absent. Testes arranged in double layer, number 70-80, ovoid, 25^4-2 in diameter, encircle the female genital complex, and some testes are present anterior to the cirrus sac. Vagina not seen. Ovary bilobed, 130-160 wide x 80-105 long (BMNH ). Gravid segments with vitelline follicles of 15-20 in diameter, uterus extending over most of the proglottids. Other details of the female genital complex not seen. ETYMOLOGY. The new species was named after T. Southwell, in whose collection the present specimens were found. Remarks. Southwell (1924, 1929a, 1930) gave a first description of N. southwelli sp. nov. but identified the specimens as N. perideraeus Shipley & Hornell, 1906. His scolex measurements lie within the same range (Southwell, 1929a, p. 257-258; 1930, p. 84-86), and the illustrations of the tentacular armature are similar to Figs 2a-c. Fig. 28d in Southwell (1929a) as well as Fig. 16d in Southwell (1930) illustrate the slender, strongly recurved hooks of the basal tentacular 125 armature (Fig. 2a), and Southwell's Figs (28c and 16c) illustrate the metabasal armature with the rose-thorn shaped hooks
Size: 1855px × 1347px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bhlconsortium, bookcentury1900, bookcollectionbiodiversity, bookl
