Psamathe Johnston 1836

• Main Author: Salazar-Vallejo, Sergio I.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2022
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Phyllodocida; Hesionidae; Psamathe; Antarctic; The Antarctic; Pacific; Keferstein; Antarc*
• Online Access: https://zenodo.org/record/5872788; https://doi.org/10.5281/zenodo.5872788

Genus Psamathe Johnston, 1836 Psamathe Johnston, 1836: 14-16. — Pleijel 1998: 122 (syn., diagnosis). — Parapar et al. 2004: 232. TYPE SPECIES. — Psamathe fusca Johnston, 1836, by monotypy. DIAGNOSIS. — Psamathinae with two lateral antennae, without median antenna; no frontal tubercle; eyes present; nuchal organs separate; palpostyles ovoid, as long as palpophores; 8 pairs of tentacular cirri; without notochaetae; neurochaetae with simple and compound falcigers; pharynx without jaws, with marginal papillae. DISTRIBUTION. — The species of Psamathe are only known from temperate localities in the Atlantic and Pacific and from the Antarctic, in shallow water, rocky or mixed bottoms. A new species, P. charpyi n. sp., is described from the Eastern tropical Pacific. The confusion in the identification of the species and their rarity might explain these sporadic records. KEY TO SPECIES OF PSAMATHE JOHNSTON, 1836 REMARKS Psamathe cirrhata Keferstein, 1862 might need a modification in the specific epithet. As usual for those times, etymology was not explained, but the h letter modifies the meaning (Brown 1954: 206) from having filaments, or provided with cirri, which is typical for most hesionids (L. cirrus), to being orange-colored (Gr. cirrho, kirrhos). However, the term was derived from the German noun for cirri, used several times along the original description and must be corrected for indicating cirri (ICZN 1999, Art. 32.5.1). Psamathe fusca hibernica was originally described as Castalia Savigny, 1822 (accepted as Nereimyra de Blainville, 1828), but in the brief diagnosis, Southern (1914: 49) regarded it as very similar to P. fusca; Hartman (1959: 183) included it as a subspecies. The Western Atlantic records of P. cirrata by Uebelacker (1984) differ from the Eastern Atlantic forms, and might belong to an undescribed species, because they have smaller eyes, positioned on the posterior prostomial half, and by having neurochaetae with blades 6-20× longer than wide. 1. Dorsal cirri longer than body width. 2 — Dorsal ...