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Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species

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Abstract

The present paper deals with the diversity of nephtyid polychaetes (Nephtyidae) from the Sea of Marmara and the Black Sea. Three species belonging to two genera (Micronephthys and Nephtys) were found in the Black Sea (coast of Turkey) and six species belonging to three genera (Inermonephtys, Micronephthys and Nephtys) were found in the Sea of Marmara. The material includes two species new to science, Inermonephtys turcica n. sp. and Nephtys sinopensis n. sp., and a species record (Nephtys kersivalensis McIntosh, 1908) new to the Sea of Marmara's marine fauna. Nephtys sinopensis n. sp. is mainly characterized by having 1-4 geniculate chaetae in the postacicular position of the parapodia; digitiform antennae, palps, and ventral cirri at chaetiger 1 with swollen tips; small and cirriform branchiae present from chaetiger 4 to the end of the body; poorly developed parapodial prechaetal lamellae in median and posterior chaetigers and long ventral cirri along the body. Inermonephtys turcica n. sp. is mainly characterized by having cushion-like palps with digitiform tips; well developed neuropodial postchaetal lamellae; barred chaetae in preacicular position of the anterior and median parapodia; and branchiae first appearing between chaetiger 3 and 13 (depending on body size).
ZOOTAXA
ISSN 1175-5326 (print edition)
ISSN 1175-5334 (online edition)
Accepted by J. Williams: 29 Sept. 2021; published: 29 Oct. 2021 183
Zootaxa 5060 (2): 183–214
https://www.mapress.com/j/zt/
Copyright © 2021 Magnolia Press Article
https://doi.org/10.11646/zootaxa.5060.2.2
http://zoobank.org/urn:lsid:zoobank.org:pub:081DB1D0-CD1D-4B53-ADD8-F2831A67A419
Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with
descriptions of two new species
SEVGI KUŞ1*, GÜLEY KURT2 & MELIH ERTAN ÇINAR3
1Sinop University, Institute of Natural and Applied Sciences, Sinop, Turkey
2Sinop University, Faculty of Arts and Sciences, Department of Biology, Sinop, Turkey
gkurt@sinop.edu.tr; http://orcid.org/0000-0002-9996-4365
3Ege University, Faculty of Fisheries, Department of Hydrobiology, Izmir, Turkey
melih.cinar@ege.edu.tr; http://orcid.org/0000-0002-1802-2801
*Corresponding author.
kus.sevgi@gmail.com; http://orcid.org/0000-0002-3336-3444
Abstract
The present paper deals with the diversity of nephtyid polychaetes (Nephtyidae) from the Sea of Marmara and the Black
Sea. Three species belonging to two genera (Micronephthys and Nephtys) were found in the Black Sea (coast of Turkey)
and six species belonging to three genera (Inermonephtys, Micronephthys and Nephtys) were found in the Sea of Marmara.
The material includes two species new to science, Inermonephtys turcica n. sp. and Nephtys sinopensis n. sp., and a
species record (Nephtys kersivalensis McIntosh, 1908) new to the Sea of Marmara’s marine fauna. Nephtys sinopensis
n. sp. is mainly characterized by having 1–4 geniculate chaetae in the postacicular position of the parapodia; digitiform
antennae, palps, and ventral cirri at chaetiger 1 with swollen tips; small and cirriform branchiae present from chaetiger
4 to the end of the body; poorly developed parapodial prechaetal lamellae in median and posterior chaetigers and long
ventral cirri along the body. Inermonephtys turcica n. sp. is mainly characterized by having cushion-like palps with
digitiform tips; well developed neuropodial postchaetal lamellae; barred chaetae in preacicular position of the anterior and
median parapodia; and branchiae first appearing between chaetiger 3 and 13 (depending on body size).
Key words: Inermonephtys, Nephtys, new records, new species, Polychaetes, Turkey
Introduction
Worms belonging to the family Nephtyidae Grube, 1850 generally live in soft substrata, including fine sand or sandy
muds (Hartman 1950; Pettibone 1963; Beesley et al. 2000; Rouse & Pleijel 2001). They are mostly distributed in
shallow-waters, but bathyal and abyssal species are also known (Kirkegaard 1956, 1983; Hancock 1969). The family
contains four genera (Aglaophamus Kinberg, 1866, Inermonephtys Fauchald, 1968, Micronephthys Friedrich, 1939,
Nephtys Cuvier, 1817) and 144 valid species worldwide (Read & Fauchald 2020). To date, twenty-two species from
the Mediterranean Sea, ten species from the Sea of Marmara and nine species from the Black Sea were reported
(Rullier 1963; Campoy 1982; Arvanitidis 2000; Kiseleva 2004; Laborda 2004; Castelli et al. 2008; Abd-Elnaby
2009; Coll et al. 2010; Ravara et al. 2010; Kurt-Şahin & Çinar 2012; Çinar et al. 2014; Mikac 2015; Kuş & Kurt-
Şahin 2016; Faulwetter et al. 2017; Kurt-Şahin et al. 2017a, b; Bakalem et al. 2020; Dnestrovskaya 2020). The
number of species reported so far is an underestimate as no detailed study regarding the taxonomy of the family
has been carried out in these regions. However, Dnestrovskaya (2020) recently provided an illustrated key to all
nephtyid species reported from the Black Sea.
In the present paper, we aimed to assess the diversity of Nephtyidae in the Sea of Marmara and the Black Sea
coast of Turkey. All species found in these regions were described and compared with the original and subsequent
descriptions of these species. In total, six species of Nephtyidae were described: Inermonephtys turcica n. sp.;
Micronephthys longicornis (Perejaslavtseva, 1891); Nephtys hombergii Savigny in Lamarck, 1818; Nephtys incisa
Malmgren, 1865; Nephtys kersivalensis McIntosh, 1908 and Nephtys sinopensis n. sp.
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