Nomenclature
original description
(of Poseidon affinis Stimpson, 1854) Stimpson W. (1854). Synopsis of the marine Invertebrata of Grand Manan, or the region about the mouth of the Bay of Fundy, New Brunswick. <em>Smithsonian Contributions to Knowledge.</em> 6: 1-67, pls 1-3., available online at https://www.biodiversitylibrary.org/page/32536624
page(s): 28 [details]
basis of record
Gosner, K. L. (1971). Guide to identification of marine and estuarine invertebrates: Cape Hatteras to the Bay of Fundy. <em>John Wiley & Sons, Inc., London.</em> 693 pp. [pdf copepod and branchiuran :445-455]. (look up in IMIS) [details] Available for editors 
[request]
Other
additional source
Linkletter, L. E. (1977). A checklist of marine fauna and flora of the Bay of Fundy. <em>Huntsman Marine Laboratory, St. Andrews, N.B.</em> 68: p. [details]
additional source
Miner, R. W. (1950). Field book of seashore life. <em>G.P. Putnam & Sons.</em> 1-888. [details]
additional source
Pollock, L.W. (1998). A practical guide to the marine animals of northeastern North America. Rutgers University Press. New Brunswick, New Jersey & London. 367 pp., available online at http://books.google.com/books?id=i1AmT31cuR4C [details]
additional source
Gosner, K.L. (1979). A Field Guide to the Atlantic Seashore. Invertebrates and Seaweeds of the Atlantic Coast from the Bay of Fundy to Cape Hatteras. <em>Wiley-Interscience, Boston.</em> 329pp., figs. 1-72, pls. 1-64. [pdf copepods only]. [details] Available for editors [request]
additional source
Trott, T. J. (2004). Cobscook Bay inventory: a historical checklist of marine invertebrates spanning 162 years. <em>Northeastern Naturalist.</em> 11, 261-324., available online at http://www.gulfofmaine.org/kb/files/9793/TROTT-Cobscook%20List.pdf [details] Available for editors [request]
additional source
Integrated Taxonomic Information System (ITIS). , available online at http://www.itis.gov [details]
From editor or global species database
Original description "Poseidon affinis, Grd., n. s. Body very slender, nearly filiform, about two inches in length when extended and in activity. Color clear reddish above, white below. Two elongated clusters of eyes at the anterior extremity. Mouth underneath, situated behind the visual clusters. In the laminarian zone" (Stimpson 1854: 28). [details]
Original description Poseidon affinis, Grd., n. s. Body very slender, nearly filiform, about two inches in length when extended and in activity. Color clear reddish above, white below. Two elongated clusters of eyes at the anterior extremity. Mouth underneath, situated behind the visual clusters. In the laminarian zone. [details]Unreviewed
Diet generally for group, they are carnivorous; in some cases only the body juices are ingested but the whole prey may be taken in. feed on protozoans, other microfauna and at times prey their own size [details]
Dimensions length up to 150 mm by 4 mm [details]
Distribution Nova Scotia to Cape Cod, including Cobscook Bay [details]
Habitat benthic, living under rocks or in burrows in soft substrata, or crawling among algae, hydroids, or in bottom debris [details]
Reproduction sexes are separate; fertilization is external for most species. Asexual reproduction also occurs by fragmentation [details]
remark species fragment easily when handled [details]
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