Zelentia ninel Picton 2017
- Dataset
- Ontogeny as an important part of integrative taxonomy in tergipedid aeolidaceans (Gastropoda: Nudibranchia) with a description of a new genus and species from the Barents Sea
- Rank
- SPECIES
- Published in
- Picton, Bernard (2017): Ontogeny as an important part of integrative taxonomy in tergipedid aeolidaceans (Gastropoda: Nudibranchia) with a description of a new genus and species from the Barents Sea. Zootaxa 4324 (1), DOI: 10.11646/zootaxa.4324.1.1
Classification
- kingdom
- Animalia
- phylum
- Mollusca
- class
- Gastropoda
- order
- Nudibranchia
- family
- Tergipedidae
- genus
- Zelentia
- species
- Zelentia ninel
description
Description of adults. External morphology. The length of the holotype is 6 mm and width 1.2 mm (Fig. 1 A – B). The length of more than one hundred observed living mature specimens ranged from 4 to 6 mm, the width ranged from 0.6 to 1.2 mm. The body is narrow. The rhinophores are similar in size to the oral tentacles, smooth. The cerata are relatively long, thin, finger-shaped. Ceratal formula of the holotype: right (2,2,2; anus, 2,2,1) left (2,3,3; 3,2,1). The foot is narrow, anteriorly rounded, no foot corners. Colour. The ground colour is whitish. The digestive branches in the cerata are pale brownish to pinkish. A few small opaque white spots are scattered at the ceratal tops. There are no white spots throughout most of the length of the cerata. Anatomy. Digestive system. The jaws are ovoid (Fig. 1 E, G) The masticatory processes of jaws bear a single row of simple denticles (Fig. 1 F). The radular formula in two studied specimens (4 – 5 mm in length) is 17 – 19 x 0.1.0. The radular teeth are slightly yellowish. The central tooth is narrow, elongated, with low cusp and four lateral denticles (plus sometimes very small outer denticles) (Figs. 1 D). Reproductive system. (Figs. 4 A). The ampulla is moderately short and swollen (Fig. 4 A, a). The prostate is a slightly convoluted tube (Fig. 4 A, pr). The prostate transits to a penial sheath, which contains a conical penis with a curved chitinous stylet (Fig. 4 A, p). A supplementary (“ penial ”) gland inserts into base of the penis (Fig. 4 A, pg). The seminal receptacle is small, rounded, on a stalk (Fig. 4 A, r). The female part includes mucous and capsular glands (Fig. 4 A, fgm). Description of egg masses and early juveniles. Eggs mass is ovoid or semi-spiral. Number of eggs ca. 10 – 60. Eggs develop within 3 – 4 weeks. This new species is invariably characterized by direct development with hatching shell-less early postlarval specimens (Fig. 3). The early juveniles with small oral veil and only single pair of short cerata. No oral tentacles and rhinophores. Anus lateral on the right side. The digestive gland without numerous branches. Radula and jaws present. The anterior part of reproductive system is absent. Habitats. Inhabits the stony intertidal. Feeds on campanulariid hydroids, including Gonothyraea loveni (Allman, 1859) and Obelia longissima (Pallas, 1766).
description
http: // zoobank. org / urn: lsid: zoobank. org: act: 9 B 3 BAEC 2 - 85 DC- 442 C- 967 C- 001732761896 Type material. Holotype, ZMMU Op- 509, 6 mm in length, 1.2 mm in width, Barents Sea, Dalne-Zelenetskaya Bay (near Dalnie Zelentsy settlement, 69 ° 07´N 36 ° 03´E), intertidal, collected by T. A. Korshunova, A. V. Martynov, 19.08.2012. Paratypes, ZMMU Op- 187, 1 specimen same locality, collected by T. A. Korshunova, A. V. Martynov, 0 1.08.2005. ZMMU Op- 188, 1 specimen, same locality, collected by T. A. Korshunova, 17.08.2006. ZMMU Op- 400, 1 specimen, 4.5 mm in length, 0.8 mm in width, live, same locality, collected by T. A. Korshunova, A. V. Martynov, 19.08.2012. ZMMU Op- 401, 1 specimen (5 mm in length, 0.6 mm in width, live), same locality, collected by T. A. Korshunova, A. V. Martynov, 19.08.2012. ZMMU Op- 402, 1 specimen (4.8 mm in length, 1 mm in width, live), same locality, collected by T. A. Korshunova, A. V. Martynov, 0 3.08.2012.
distribution
Distribution. To date known only from the southern coast of the Barents Sea in the Murmansk region. Potentially can be discovered in the neighboring parts of Norway.
etymology
Etymology. This species is named in honour of the scientist and marine biologist Ninel Panteleeva (Murmansk Marine Biological Institute), who for a long time lived in the Dalnie Zelentsy settlement, close to the type locality of this species. Ninel also generously helped us with the field work at Dalnie Zelentsy.
materials_examined
Type locality. Dalnie Zelentsy, Barents Sea.
Name
- Homonyms
- Zelentia ninel Picton 2017