- spicular muscles
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(NEMATA)Muscles for the protraction and retraction of the spicules.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
retractor spiculi — (NEMATA) Paired spicular muscles, each containing a nucleus in the sarcoplasm, arising from the spicular head and extending to the hypodermis in the region of the lateral chords … Dictionary of invertebrate zoology
cnidarian — /nuy dair ee euhn/, n. 1. any invertebrate animal, as a hydra, jellyfish, sea anemone, or coral, considered as belonging to the phylum Cnidaria, characterized by the specialized stinging structures in the tentacles surrounding the mouth; a… … Universalium
gubernaculum — n.; pl. la [L. dim. gubernare, to guide] 1. (CNIDARIA: Hydrozoa) Hydroida, protoplasmic strands connecting the blastostyle and internal marsupium to the gonothecal wall; possibly functioning in nutrition or as a device for keeping the internal… … Dictionary of invertebrate zoology
rostrum — n.; pl. tra [L. rostrum, beak] 1. A beak or snout; see rostellum. 2. (ARTHROPODA: Chelicerata) The labrum of spiders. 3. (ARTHROPODA: Crustacea) The median pointed process at the end of the cephalothorax. a. In thoracic barnacles, a valve between … Dictionary of invertebrate zoology