Sphaerephesia sp. 1

Capa, Maria, Nygren, Arne, Parapar, Julio, Bakken, Torkild, Meissner, Karin & Moreira, Juan, 2019, Systematic re-structure and new species of Sphaerodoridae (Annelida) after morphological revision and molecular phylogenetic analyses of the North East Atlantic fauna, ZooKeys 845, pp. 1-97 : 60

publication ID	https://dx.doi.org/10.3897/zookeys.845.32428
publication LSID	lsid:zoobank.org:pub:F05BDFEC-4C4A-4F22-9685-4AC2655B973D
persistent identifier	https://treatment.plazi.org/id/F49EA3EE-E7D9-7EF3-FCC9-EDF09D67D090
treatment provided by	ZooKeys by Pensoft
scientific name	Sphaerephesia sp. 1
status

Treatment

Sphaerephesia sp. 1 View in CoL Fig. 8E

Diagnosis.

Body ellipsoid, flattened dorsoventrally, up to 3 mm long. Body unpigmented; macrotubercles in live specimens orange, or brownish in fixed material. Head appendages smooth, digitiform. Tentacular cirri smaller than prostomial appendages. Dorsum with four longitudinal rows of large, spherical, or pear-shaped sessile macrotubercles in a single transverse row per segment, from segment 2. Additional papillae on dorsum. First parapodia short and digitiform, with two rounded papillae on dorsal surface. Acicular lobe from segment 1. Eight to ten parapodial papillae. Ventral cirri digitiform shorter than acicular lobe tip. Approximately eight compound chaetae with medium length blades (ca. ten times as long as wide); unidentate.

Examined material.

(5 specs) Iceland Sea, SMF 23908 and 23907 (2 spec, used for DNA sequencing, SPH056 and SPH057, respectively), NE Iceland, 66°32.63'N, 12°52.48'W, 317.2 m, 22 Sep 2011; Svalbard, ZMBN 127327 (1 spec. used for DNA sequencing, SPH 296), Svalbard, 81°0.066'N, 19°17.802'E, 168 m, 01 Sep 2009; Barents Sea, ZMBN 127326 (1 spec. used for DNA sequencing, SPH292); Finnmark, 72°18.59'N, 32°20.48'E, 312 m, 04 Aug 2013; Skagerrak, ZMBN 125432 (1 spec. used for DNA sequencing SPH 297 photographed alive Fig. 8D), 58°40.806'N, 10°23.982'E, 238 m, 16 May 2009; ZMBN 127328 (1 spec. used for DNA sequencing, SPH 298.) 58°40.806'N, 10°23.982'E, 237 m, 16 May 2009.

Remarks.

These specimens were initially identified as Sphaerephesia philippi comb. n., as there seems to be no noticeable morphological differences between them. However, analyses of molecular data recovered some of the specimens forming a different lineage, sister group to a clade containing S. discolis and S. sibuetae (Fig. 1). We would like to corroborate this information with further data before describing it as a new species.

Distribution.

Iceland Sea, Svalbard, Barents Sea, and Skagerrak.

Habitat.

Continental shelf sediments (100-350 m).