Published June 27, 2018
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Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology
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Mańko, Maciej K., Pugh, Philip R. (2018): Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology. Zootaxa 4441 (2): 311-331, DOI: 10.11646/zootaxa.4441.2.7
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- https://www.checklistbank.org/dataset/29783
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- urn:lsid:zoobank.org:pub:1F81A5B9-5FCB-43F4-B85B-5398AB16E09E
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- urn:lsid:plazi.org:pub:A407210E4E24DE67325A8D14FFAD0554
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- http://publication.plazi.org/id/A407210E4E24DE67325A8D14FFAD0554
References
- As Purcell (1980) pointed out, Agalma species use a form of aggressive mimicry in their attempts to catch prey. The expanded tentillum, with its red cnidoband and two extended lateral terminal filaments, can take on the semblance of a copepod that, when contracted and relaxed, acts as a lure to entice its prey. Further examples of aggressive mimicry have recently been found for species of the genus Erenna (Haddock et al. 2005b; Pugh & Haddock 2016). Purcell (1981) also found that the preferred prey of A. elegans and A. okenii was largely shrimp or small fish, with an occasional, presumably carnivorous, copepod. Although no prey items were identified from the gastrozooids, based on the typical Agalma- like morphology of an A. clausi tentillum, it can be assumed that the diet of these species is similar.
- Bedot (1888) stated that the release of clouds of red pigmentation from the glands on the Type D bracts was very reminiscent of the release of similar material from the palpons of some Forskalia species. Although the material appeared not to be bioluminescent (see Mills et al. 1996) it is possible that it was similarly fluorescent, and presumably its release was a defensive reaction if the colony was disturbed.
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