Revision of Hermadion Kinberg, 1856, with a redescription of Hermadion magalhaensi Kinberg, 1856, Adyte hyalina (G.O. Sars, 1873) n. comb. and Neopolynoe acanellae (Verrill, 1881) n. comb. (Polychaeta: Polynoidae)

Abstract

Examination of all species previously referred to the genus Hermadion revealed that the type species, H. magalhaensi Kinberg, 1856, is the only valid species in the genus. H. magalhaensi is redescribed and its synonymy with Hermadion longicirratus Kinberg, 1856, Hermadion kerguelensis McIntosh, 1885, and Lagisca laevis Hartmann-Schröder, 1962, is discussed. The generic attribution of 12 species that had already been moved from Hermadion to other genera by earlier authors is confirmed. Following our re-examination four species are moved to other genera: Harmothoe ornatus (Hartman, 1967) n. comb., Harmothoe africanus (Hartman, 1974) n. comb., Adyte hyalina (G.O. Sars, 1873) n. comb., and Neopolynoe acanellae (Verrill, 1881) n. comb., are redescribed. Due to lack of type material and insufficient descriptions Hermadion sabatieri Darboux, 1900, and H. fauveli Gravier, 1918 are considered indeterminable polynoids. Hermadion fugax Giard, 1890 is a nomen nudum, because a formal description has never been published. The generic diagnosis of Hermadion is emended and the validity of Hermadionella Uschakov, 1982 is confirmed. An identification key and synoptic tables of characters are provided for all genera considered here.

Biodiversity data and new species descriptions of polychaetes from offshore waters of the Falkland Islands, an area undergoing hydrocarbon exploration

“…The genera Eunoe and Hermadion share some characters with Harmothoe such as a short body and the presence of 15 elytragerous segments (see e.g., Barnich and Fiege 2009Bock et al 2010), but while prostomial cephalic peaks and neuropodial supracicular lobes are present in Harmothoe and Eunoe, these are lacking in Hermadion (see Barnich and Fiege 2006). However, Eunoe supposed to have only unidentate neurochaetae (see e.g., Fiege 2009, 2010), while supra-acicular neurochaetae in Falkland Island specimens are clearly bidentate.…”

Sleeping with the enemy: unravelling the symbiotic relationships between the scale wormNeopolynoe chondrocladiae(Annelida: Polynoidae) and its carnivorous sponge hosts

“…Sponges and polychaetes collected in this study were identified to the lowest taxonomic level using a number of taxonomical descriptions (Kirkegaard, 2001;Bock et al, 2010;Cristobo et al, 2015;Hamel et al, 2015;Hestetun et al, 2017). Also, all taxonomic names used were cited according to the World Register of Marine Species (http://www.marinespecies.org/).…”

Insights into the symbiotic relationship between scale worms and carnivorous sponges (Cladorhizidae, Chondrocladia)

“…Additionally, Serpetti et al (2017), also found that obligate coral commensal species appeared to be monophyletic, but pointed out that this was probably due to limited taxon sampling. Amongst Polynoinae, some genera are known to be entirely comprised of commensal species, either obligate or facultative, including the genus Gorgoniapolynoe, which occurs in association with a number of alcyonaceans and hydroids (see Molodtsova et al 2016), and the genus Neopolynoe Loshamn, 1981, known to occur in a variety of hosts including alcyonaceans, hydroids, tube-building polychaetes, and even carnivorous sponges (Loshamn 1981;Kirkegaard 2001;Bock et al 2010;Barnich et al 2012).…”