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Prey Capture in Lyonsiella Formosa (Bivalvia: Anomalodesmata: Verticordiacea)

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Title: Prey Capture in Lyonsiella Formosa (Bivalvia: Anomalodesmata: Verticordiacea)
Authors: Morton, Brian
Issue Date: Oct 1984
Publisher: University of Hawai'i Press
Citation: Morton B. 1984. Prey capture in Lyonsiella formosa (Bivalvia: Anomalodesmata: Verticordiacea). Pac Sci 38(4): 283-297.
Abstract: A specimen of the bathyal verticordiid Lyonsiella formosa has
been obtained from Hawaii at 460m depth. Assignment of this specimen to L.
formosa suggests that this species has a much wider range than hitherto believed.
Dissection and subsequent histological examination of the specimen suggests a
mechanism of prey capture completely different from that previously described
for this species and resembling that attributed to Poromya granulata. Sensory
papillae on the siphonal tentacles probably detect the prey. Prey capture is by
eversion of an enormous hoodlike cowl of the inhalant siphon. Inversion brings the
prey into the mantle cavity. Further distension of the siphon within the mantle
cavity is believed to push the prey into the buccal apparatus comprising medially
fused labia l palps . The unfused tips of the palps or the foot may assist in this.
A model of the hydraulic changes that may occur in Lyonsiellaformosa to effect
prey capture is described. The similar modes of feeding exhibited by L.formosa
(Verticordiidae) and Poromya granulata (Poromyidae) suggest a close affinity.
URI/DOI: http://hdl.handle.net/10125/830
ISSN: 0030-8870
Appears in Collections:Pacific Science Volume 38, Number 4, 1984



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