WoRMS taxon details
original description
Hartman, Olga. (1938). The types of the polychaete worms of the families Polynoidae and Polyodontidae in the United States National Museum and the description of a new genus. <em>Proceedings of the United States National Museum.</em> 86(3046): 107-134., available online at https://biodiversitylibrary.org/page/7568964 page(s): 110 [details] Available for editors [request]
additional source
Barnich, Ruth; Orensanz, José; Fiege, Dieter. (2012). Remarks on some scale worms (Polychaeta, Polynoidae) from the Southwest Atlantic with notes on the genus Eucranta Malmgren, 1866, and description of a new Harmothoe species. <em>Marine Biodiversity.</em> 42(3): 395-410. page(s): 405 [details] Available for editors [request]
From editor or global species database
Diagnosis After Barnich, Orensanz & Fiege (2012): Body flattened dorsoventrally, elongate, with about 45 segments. Elytra 20–24 pairs on segments 2, 4, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 28, 30, 31, and on every 2nd or 3rd more posteriorly. Prostomium with three antennae; lateral antennae inserted terminally.
"The main distinguishing characters of the genera Halosdyna Kinberg, 1856 and Halosydnella Hartman, 1938 are the number of segments and elytra respectively. Adult specimens of Halosydna have only up to 36 segments and 18 pairs of elytra, while those of Halosydnella are characterized by 45 segments and 20–24 pairs of elytra." [details]
Taxonomy Hartman (1938) initially included these species in the new genus:
Halosydna australis Kinberg, from the La Plata River.
Halosydna brasiliensis Kinberg, from Brazil [synonym].
Halosydna fusca Grube, from Brazil.
Halosydna alleni Day, from False Bay, South Africa [to Hyperhalosydna].
Halosydna grisea Treadwell, from Argentina. [synonym]
Polynoe punctulata Grube, from Brazil.
Halosydna galapagensis Monro, from the Galapagos Islands.
Halosydna oculata Treadwell, from Samoa. [synonym in Heteralentia]
Halosydna fusca-maculata Treadwell, from the Barbados
[details]
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