. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 180 P. EMSCHERMANN crown, bulged out due to the enlarged brood pouches, like a clumsy rucksack almost equal in size to the entire normal calyx (Fig. 160- A/iwwi/rwiWs Total length: .'TO Mm (300-485 Mm) (Nielsen 392 Mm: Franzen: 426 urn): Length of calyx: 305 ^m (175-325 Mm) (Nielsen: 285 Mm; Franzen: 375 ftm): length of stalk: 65 ^m (32-1 1 1 ^m) (Niel- sen: 107 ftm: Franzen: 51 Mm): width of calyx: 223 Mm (191-254 Mm) (Nielsen: 200 Mm; Franzen: 292 Mm); thickness of calyx: 290 Mm (175- 461 Mm) (Nielsen: 205 Mm: Franzen: 332
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 180 P. EMSCHERMANN crown, bulged out due to the enlarged brood pouches, like a clumsy rucksack almost equal in size to the entire normal calyx (Fig. 160- A/iwwi/rwiWs Total length: .'TO Mm (300-485 Mm) (Nielsen 392 Mm: Franzen: 426 urn): Length of calyx: 305 ^m (175-325 Mm) (Nielsen: 285 Mm; Franzen: 375 ftm): length of stalk: 65 ^m (32-1 1 1 ^m) (Niel- sen: 107 ftm: Franzen: 51 Mm): width of calyx: 223 Mm (191-254 Mm) (Nielsen: 200 Mm; Franzen: 292 Mm); thickness of calyx: 290 Mm (175- 461 Mm) (Nielsen: 205 Mm: Franzen: 332 Mm); number of tentacles: 8 (Nielsen: 8, Franzen: 8); maximal number of buds: 8 (Nielsen: 15). Additional remarks on the variability of this species. Although highly variable, especially with respect to the length of the stalk and shape of the foot plate, the species is well-defined by its general body shape, the crowded buds, and the paramedial budding areas, as well as by the small groove-like foot-gland in the buds. In 1973, Franzen described a new loxosomatid found in small numbers on the gills of Aglaophamus virginis (Polychaeta. Nephthyidae), from old samples collected northeast of South Georgia during the 1902 Swedish Ant- arctic expedition; he named it Loxosomella brachystipes (Figs. 17b. c: 18b, c). This species, in most instances, looks like Loxosomella various, but according to Franzen, the shape of the foot is markedly different in these two forms. However, judging from the present samples, both of these forms must be considered identical, because they cover the whole range from /_. varicins- to L. brachystipes- type specimens. So, in agreement with Franzen, they must be considered synonymous (see Fig. 18 regarding the vari- ability of this species). Habitat and distribution. Loxosomella various has been found living on the gills of a broad spectrum of nephtydid polychaetes, never on hosts belonging to other polychaete families. In the Atlantic sector of the subant
Size: 1220px × 2049px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
