Nereididae (Annelida: Polychaeta) from intertidal habitats in the Gulf of Oman, Iran Author Yousefi, Shetav Author Rahimian, Hasan Author Nabavi, Seid Mohammad Bagher Author Glasby, Christopher text Zootaxa 2011 3013 48 64 journal article 46422 10.5281/zenodo.201773 6a8f27e6-bbb4-4307-b2e6-e1b9f4986a39 1175-5326 201773 Leonnates decipiens Fauvel, 1929 Leonnates decipiens Fauvel, 1929 : 180 –182, fig. 1; Fauvel, 1953 : 171 –172, fig. 87; Day, 1967 : 330 , figs 14–11; Ben-Eliahu, 1972 : 192 ; Qiu & Qian, 2000 : 1123 , fig. 6. Material examined . Iran , Gulf of Oman , Khalasi estuary, 2 specimens ( ZUTC Ann. 1101). Description. Material examined 42 mm long, 2 mm wide at chaetiger 10 (excluding parapodia). Longest tentacular cirri extending to chaetiger 4. Prostomium not cleft and relatively wide, Pharynx with small, transparent, conical paragnaths, arranged as follows: Area I = 0, II =5, in small cluster, III = small group of small paragnaths, IV = small group of about 10 paragnaths; oral ring with soft papillae arranged as follows: V = 0, VI = 1 large papilla, VII–VIII = 8 papillae in one row. Notopodia with three ligules, dorsal cirrus shorter than dorsal ligule. Anterior neuropodia have unequal, finger-like ligules, ventral ligule in middle and posterior neuropodia long and pointed. Ventral cirrus shorter than ventral ligule. Notochaetae all homogomph spinigers. Neurochaetae all homogomph spinigers and heterogomph falcigers; mid-body falcigers have convex spinous blade with truncate tip. Regional distribution. Gulf of Oman (Khalasi estuary); Arabian Sea ( Table 2 ). TABLE 2. Records of Nereididae from the Gulf of Oman and adjacent seas. Present (+); not reported (–); Persian Gulf = Iranian Gulf. Records of Perinereis cultrifera include the following reported varieties, P. c. obfuscata, P. c. floridana, P. c. perspillata, P. c. striolata ; those of Perinereis nuntia include P. n. typica , P. n. djiboutiensis, P. n. brevicirris , and P. n. vallata .

Species Persian Gulf	Gulf of Oman	Arabian Sea	Selected reference
Alitta succinea (Frey & Leuckart) +	+	–	Wesenberg-Lund (1949) as Nereis alatopalpis and Nereis singularis
Ceratocephale orientalis (Hartman) –	–	+	Hartman (1974a)
Ceratonereis mirabilis Kinberg +	+	–	Fauvel (1911, 1918, 1919)
Ceratonereis tripartita (Horst) +	–	–	Wesenberg-Lund (1949)
Dendronereides heteropoda Southern +	–	–	Fauvel (1932)
Gymnonereis phuketensis Hylleberg & – Nateewathana	–	+	Hartman (1974a) as Tambalagamia fauveli
Leonnates decipiens Fauvel –	+	+	Hartman (1974a); this study
Leonnates indicus Kinberg +	+	+	Fauvel (1918, 1919) and Wesenberg-Lund (1949) as Leonnates jousseaumei
Leonnates persicus Wesenberg-Lund +	–	+	Wesenberg-Lund (1949)
Neanthes deplanata Mohammad +	+	Mohammad (1971); this study
Neanthes longilingulis (Monro) –	–	+	Monro (1937)
Neanthes unifasciata (Willey) +	–	–	Mohammad (1973)
Neanthes willeyi (Day) +	–	–	Fauvel (1911) as Neanthes capensis ; Mohammad (1971)
Nereis coutieri Gravier +	+	+	Fauvel (1911, 1919); this study
Nereis jacksoni Kinberg +	–	+	Monro (1937); Hartman (1974a)
Nereis neogracilis Mohammad +	–	–	Mohammad (1970)

continued next page World distribution. Congo , Senegal , and Mozambique , Africa; northern Australia (Hutchings & Reid, 1991); Suez Canal; Krusadai Island, India ( type locality); Sri Lanka ; China . TABLE 2. (continued)

Species	Persian Gulf	Gulf of Oman	Arabian Sea	Selected reference
Nereis persica Fauvel	+	–	+	Fauvel (1918, 1919); Wesenberg-Lund (1949); Hartman (1974a)
Perinereis arabica Mohammad	+	–	–	Mohammad (1971)
Perinereis caeruleis (Hoagland)	–	–	+	Fauvel (1932) as Perinereis neocaledonica
Perinereis cultrifera (Grube)	+	+	–	Fauvel (1911); Wesenberg-Lund (1949); Moham- mad (1971); this study
Perinereis heterodonta Fauvel	+	+	–	Fauvel (1911); this study
Perinereis horstii Gravier	+	+	+	Hartman (1974b) and Mohammad (1980) as Peri- nereis vancaurica ; this study
Perinereis kuwaitensis Mohammad	+	–	–	Mohammad (1970)
Perinereis nigropunctata (Horst)	+	–	–	Mohammad (1980)
Perinereis nuntia (Savigny in Lamarck)	+	+	+	Wesenberg-Lund (1949) as Perinereis nuntia var. brevicirris ; Hartman (1974a, b); Mohammad (1971, 1980); this study
Perinereis suluana Horst	+	–	–	Mohammad (1970)
Platynereis dumerilii Audouin and Edwards	+	–	–	Fauvel (1911); Wesenberg-Lund (1949)
Platynereis fuscorubida Grube	+	–	–	Fauvel (1911)
Playnereis pulchella Gravier	+	–	+	Fauvel (1911); Monro (1937)
Pseudonereis anomala Gravier	+	+	+	Fauvel (1911); Wesenberg-Lund (1949); Moham- mad (1971)
Pseudonereis trimaculata Horst	–	+	–	this study
Simplisetia erythraensis (Fauvel)	+	–	–	Mohammad (1971, 1980)
Tylonereis bogoyawlenskyi Fauvel	+	–	–	Fauvel (1911); Mohammad (1971)
Websterinereis punctata (Wesenberg- Lund)	+	–	–	Wesenberg-Lund (1949)

Remarks. The genus was revised by Qiu & Qian (2000) , who recognised nine species: Leonnates indicus Kinberg , L. niestraszi Horst , L. decipiens Fauvel , L. insolitus Gravier & Dantan , L. simplex Monro , L. persicus Wesenberg-Lund , L. stephensoni Rullier , L. nipponicus Imijima and L. crinitus Hutchings & Reid. The present specimens closely resemble L. decipiens , originally described by Fauvel (1929) from Krusadai Island, Gulf of Mannar, south India . This is the first record of this species from the Gulf of Oman ; the only other Leonnates species reported from the Gulf of Oman is L. indicus . Leonnates decipiens may be distinguished from L. indicus based on the distribution of pharyngeal processes, shape and occurrence of the falcigers and shape of parapodia (Qui & Qian, 2000 ). Further, L. decipiens has falcigers with a convex spinous blade and truncate tip, which are present only on the neuropodia of the mid-body region. Moreover, in L. decipiens the neuropodial postchaetal ligule in anterior chaetigers has a prominent finger-like protrusion on the upper tip. In middle and posterior chaetigers, the neuropodial postchaetal ligules are greatly reduced while the ventral neuropodial ligule is much longer than the neuropodial acicular lobe and the postchaetal ligule. In L. indicus the neuropodial postchaetal ligule is similar in size along the body, and the ventral neuropodial ligule is of similar length to both the acicular lobe and postchaetal lobe.