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Nereis sp. A (NMNS 8174-036): A, anterior body; B, pharyngeal area; C, chaetiger 11, right parapodium, posterior view; D, chaetiger 36, right parapodium, anterior view. (Abbreviations: DC, dorsal cirrus; NeVL, neuropodial ventral ligule; NoDL, notopodial dorsal ligule; NoVL, notopodial ventral ligule; VC, ventral cirrus). Scale: A-B, 1.0 mm; C, 0.5 mm; D, 0.25 mm.
Source publication
Members of Nereis species are characterised by having conical paragnaths on both maxillary and oral rings of the pharynx, and notopodial homogomph falcigers on posterior chaetigers. The present faunistic study includes Nereis species collected from various ecological surveys on coastal and offshore bathyal benthic habitats of Taiwan. The main resul...
Citations
Nereididae is among the most familiar of marine annelid families, common and well-studied in most marine environments but paradoxically no recent key or identification guide exists to the world’s genera. Here updated generic descriptions, a list of characters, a linear key to genera, and minimal diagnoses that distinguish each genus from all others in the family are provided. This information is generated from a Delta database of 186 morphological characters and a link is provided to downloadable software allowing the same data to be interrogated using the open-source Delta program Intkey – a nonlinear multiple entry point computerised interactive key. For each genus the recent literature is also summarised, comments on taxonomic status provided, and published keys to species cited. Nexus format matrices are provided for all 45 genera and 158 Nereididae species, representing all genera, scored for 146 multistate characters from the same character list to facilitate future phylogenetic studies.
The last extensive exploration of Nereididae diversity within coastal waters of Western Australia was done in 1975–1984. We collected Nereididae associated with macroalgae from 38 rocky intertidal shores of Western Australia (18°S to 34°S). Eighteen species belonging to seven genera are described and illustrated. Two new species, Nereis edentata n. sp. and Nereis yuedensis n. sp., were found. Nereis edentata n. sp. differs from other Nereis species having one row of paragnaths on Areas VII–VIII and smooth notopodial homogomph falcigers in posterior chaetigers. Nereis yuedensis n. sp. differs from other Nereis species having one row of paragnaths on Areas VII–VIII and notopodial homogomph falcigers with at least one large lateral tooth, and also species having notopodial homogomph falcigers starting from chaetiger 3. The distribution of N. yuedensis n. sp. was found to be restricted within temperate Australia and N. edentata n. sp. appears to be transitional between temperate and tropical regions. Also, we remove from synonymy the probable Western Australian endemic species, Pseudonereis rottnestiana (Augener, 1913), and provide a key to all known genera and species of Nereididae from Western Australian waters.
The present study describes three new species of Platynereis Kinberg, 1865 from Taiwan to provide a better understanding of the diversity of Platynereis in the tropical Western Pacific. Platynereis hemeiensis sp. nov. is similar to P. abnormis (Horst, 1924), P. australis (Schmarda, 1861), P. hutchingsae de Leon-Gonzalez, Solis-Weiss and Valadez Rocha, 2001, and P. sinica Sun, Shen and Wu, 1978 in terms of having no notopodial homogomph falcigers in adults. However, P. hemeiensis sp. nov. differs from P. australis by having: 1) fewer transverse rows or diagonal lines in Areas III, IV, VI and VII-VIII (2-3, 6-8, 2 and 2 versus 5, 10, 4 and 4, respectively); 2) tapered dorsal cirri on anterior-most chaetigers (versus stout dorsal cirri); and 3) dorsal cirri always shorter than dorsal ligule in posterior chaetigers (versus always longer than dorsal ligule). Platynereis hemeiensis sp. nov. can be distinguished from P. abnormis and P. sinica by having transverse rows of pectinate paragnaths in Area III (versus no pectinate paragnaths). Platynereis hemeiensis sp. nov. can be readily differentiated from P. hutchingsae by having long-bladed heterogomph spinigers in neuropodia (versus short-bladed heterogomph spinigers). Both P. jihueiensis sp. nov. and P. shihmenensis sp. nov. are somewhat similar to P. bicanaliculata (Baird, 1863), because all have bifid tip of notopodial anchylosed falcigers. However, the two species differ from P. bicanaliculata by having either no pectinate paragnaths or rows of pectinate paragnaths in Area III (versus a broad, oval patch of pectinate paragnaths). Platynereis jihueiensis sp. nov. differs from P. shihmenensis sp. nov. by having: 1) three groups of pectinate paragnaths in Area III (versus no pectinate paragnaths); 2) six to seven transverse rows of pectinate paragnaths in Area IV (versus four transverse rows); 3) three parallel transverse rows of pectinate paragnaths in Area VI (versus three to four non-parallel rows); 4) seven groups of transverse rows of pectinate paragnaths in Areas VII-VIII, middle groups each with three rows and two outer most groups each with one and two paragnaths (versus five groups of transverse rows of pectinate paragnaths, middle groups each with 1-2 rows and two outer most groups each with one paragnath); and 5) each parapodium of chaetigers in anterior, mid-body and posterior regions with three, two and one notopodial homogomph falcigers, respectively (versus each parapodium with one notopodial homogomph falciger in all body regions). A key for identifying Platynereis species from East Asia is provided.
Nereis articulata Ehlers, 1887 is senior primary homonym to Nereis articulata Hsueh, 2020 from Taiwan. The older Nereis articulata name has been transferred to the genus Ceratonereis Kinberg, 1865 in the subgenus Composetia Hartmann-Schröder, 1985 by Hartmann-Schröder (1985), although this placement may be unreliable (Bakken & Wilson, 2005). Nevertheless its original name is an available name and its recombination is in use. Hsueh (2020) mistakenly treated N. articulata Ehlers, 1887 as an unavailable name and described a new Nereis, which possesses articulated tentacular cirri, as Nereis articulata Hsueh, 2020. Nereis articulata Ehlers, 1887 has precedence based on Article 23.4 of the International Code of Zoological Nomenclature (1999). Thus, Nereis taichungensis nom. nov. is named herein as a replacement name for Nereis articulata Hsueh, 2020, a junior primary homonym to N. articulata Ehlers, 1887, and thus permanently invalid (Article 57.2).
