Guide to Opisthobranchs Nudibranchia Doridina Doridoidei Onchidoridoidea Trapania lineata

Trapania lineata

Trapania lineata Haefelfinger, 1960

Trapania lineata by Enric Madrenas

Taxonomy

	Superdomain	Biota
	Kingdom	Animalia
	Phylum	Mollusca
	Class	Gastropoda
	Subclass	Heterobranchia
	Infraclass	Euthyneura
	Subterclass	Ringipleura
	Superorder	Nudipleura
	Order	Nudibranchia
	Suborder	Doridina
	Infraorder	Doridoidei
	Superfamily	Onchidoridoidea
	Family	Goniodorididae
	Genus	Trapania
	Species	Trapania lineata Haefelfinger, 1960

	Classification according to Bouchet et al. (2017) Taxonomic source: World Register of Marine Species (AphiaID: 140043).

Description
This sea slug typically measures between 10 mm and 15 mm in length. The whitish body is plump in its central area, more or less dark brown in the center deppending if /what it has been eating, and decorated with iridescent white lines that run along the back, sides of the body, head, oral tentacles, rhinophores, tail and, in certain cases, also along the axis of the branchial leaves. There is a couple of pallial tentaculiform processes, directed backwards, at the sides of the rhinophores and two processes more at the sides of the gill. The oral tentacles are usually pigmented yellow-orange, as are the tips of the rhinophores and gill leaves, propodial palps, the anterior and posterior pallial fingerlike processes and the end of the tail. The rhinophores are long and wide, with the basal portion without lamellae and of the same colour of the body, and the laminar portion coloured yellow. The gill consists of three gill leaves, one in central position and two on the sides, they have a wide rachis and are tripinnate. Among the gill leaves there are usually found copepod ectoparasites. The light beige coloured anal papilla is located right behind the gill leaves. The foot is relatively narrow and of the same color of the body, in its front side there are two backwards directed finger-like propodial palps, pigmented yellow in its distal half.

Biology
This is not a common species and usually lives in dimly lit rocky walls with an abundance of algae, sponges and hydroids, also inside caves. It feeds on entoprocta (Kamptozoa) of the genus Loxosomella (Cattaneo-Vietti et al. 1990). No other details of its biology are known.

Etymology

Trapania. The original generic name of this species was Drepania, proposed by Lafont in 1874. Pruvot-Fol in 1931 proposed changing the generic name to Trapania to disambiguate it from Drepania Hübner, 1816 (a group of lepidoptera). Madame Pruvot-Fol does not indicate the origin of the name, but there are two theories: the first would be dedicated to the city of Trapani, the province capital of western Sicily; the second would be inspired on the original generic name Drepania, derived from the Greek “Drepane” which means “sickle” and presumably refers to the shape of the appendages located on the sides of the rhinophores and gills in this genus. Pruvot Fol would have chosen the new name on the basis that it has the same meaning, but not the same sound and thus avoid confusion.
Lineata. From Latín “lineatus”, with lines, lined.

Distribution
This species is, so far, endemic of the Mediterranean Sea. It has been reported on the Mediterranean coast of France, Sardinia, Turkey and from the Strait of Gibraltar in all the Iberian Mediterranean coast and the Balearic Islands (Cervera et al. 2004). In the Catalan coast it has been reported or observed in cala Es Caials, Cadaqués, L’Escala, Medes islands, Palamos, Formigues islands, Blanes, Mataró and La Pineda (Salou).

Known georeferenced records of the species: Trapania lineata
Sources:
: OBIS : GROC 2010-2011 : Enric Madrenas : João Pedro Silva : Bernard Picton : GBIF.ORG	: OPK : VIMAR : Manuel Ballesteros. : M@re Nostrum : Altres fonts : Marine Regions

Abundance

Western Mediterranean:	★★☆☆☆
Eastern Mediterranean:	☆☆☆☆☆
Atlantic Ocean:	★☆☆☆☆

Month

This chart displays the monthly observation probability for Trapania lineata based on our own records.

Videos

More pictures

Trapania lineata by Enric Madrenas

Radula de Trapania lineata by Luis Sánchez-Tocino

Trapania lineata @ Mallorca 19-11-2014 by Lenka Juskaničová (IMG_0025m)

Trapania lineata by Enric Madrenas

Trapania lineata by Miquel Pontes

Trapania lineata @ Eivissa, Spain by Joan Pereyra

Trapania lineata mating @ Eivissa, Spain by Joan Pereyra

Trapania lineata parasited by copepoda @ L’Escala, Spain by Eli Franco Valero

Trapania lineata @ France by Pascal Girard

Trapania lineata @ Costa Brava by Manuel Ballesteros

Trapania lineata @ Granada por Luis Sánchez Tocino

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Further reading

Cite this article as:

Ballesteros, M., Madrenas, E. & Pontes, M. (2023) "Trapania lineata" in OPK-Opistobranquis. Published: 15/05/2012. Accessed: 23/09/2023. Available at (https://opistobranquis.info/en/?p=412)

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Trapania lineata