. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 1. Luxmomella brochobola seen from the oral side. The four lime-twig glands (arrows) are visible, and the pair at the left have discharged. Four zooid buds (*) of different ages are seen at either side on the anterior body wall (Scale bar: 100 ^m}. boscis epithelium. Generally- animals with rhabdite cells are small, freely mobile predators that can readily benefit from such extrusive glands. The newly detected extrusive organs of the Antarctic entoproct Loxosomella brochobola Emschermann, 1993 differ considerabl
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 1. Luxmomella brochobola seen from the oral side. The four lime-twig glands (arrows) are visible, and the pair at the left have discharged. Four zooid buds (*) of different ages are seen at either side on the anterior body wall (Scale bar: 100 ^m}. boscis epithelium. Generally- animals with rhabdite cells are small, freely mobile predators that can readily benefit from such extrusive glands. The newly detected extrusive organs of the Antarctic entoproct Loxosomella brochobola Emschermann, 1993 differ considerably from the above types in their genesis, as well as in their dimensions, structure, extruding mech- anism, and function. Materials and Methods The entoproct species bearing lime twig glands is a newly described species of Loxosomatidae discovered during the 1989/90 German Antarctic Expedition to the Weddell Sea (Emschermann, 1993). The animals were found exclusively at two locations in the northeastern Weddell Sea, at depths between 250 and 300 m, occurring in small groups of individuals only at the inner, abfrontal side of the tube-shaped colonies of the bryozoan Porella imi/ouincnsis. About 500 specimens were collected. Small numbers of specimens were kept alive on their original substratum and were examined under the stereo micro- scope, but these animals could not survive for longer than about 5-8 days under the conditions available aboard ship. Fixation ami narcotization Most of the specimens were fixed. For general mor- phological investigation, 4% formalin in seawater was used. For histological purposes, fixation was at room tem-. Figurt 2. a: Specimen with its tentacles withdrawn and the lime- twig threads ejected (arrow). A large bud (*) is seen at the base of the calyx; b: Isolated lime-twig gland with its invaginated, heavily coiled, dischargeable thread. At the bottom of the gland, in the marginal cyto- plasm, one of the four nuclei is in focus. Inset: Optical cross
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
