Lomanotus barlettai

Lomanotus barlettai  García-Gómez, López-González & García, 1990

Lomanotus barlettai by José Carlos García Gómez

Taxonomy
 

Superdomain

Biota  

 

Kingdom

Animalia  

 

Phylum

Mollusca  

 

Class

Gastropoda  

 

Subclass

Heterobranchia  

 

Infraclass

Euthyneura  

 

Subterclass

Ringipleura  

 

Superorder

Nudipleura  

 

Order

Nudibranchia  

 

Suborder

Cladobranchia  

 

Superfamily

Dendronotoidea  

 

Family

Lomanotidae  

 

Genus

Lomanotus  

 

Species

Lomanotus barlettai  Garcia-Gomez, Lopez-Gonzalez & Garcia, 1990

 
 Classification according to Bouchet et al. (2017)
Taxonomic source: World Register of Marine Species (AphiaID: 140272).
Description
Body elongated and narrow, small sized (about 5mm) and coloured brown, with a large number of brown or golden yellow surface spots, less dense in some irregularly distributed areas, which acquire a dark -almost black- appearance. It has up to 36 cerata arranged vertically in three pairs of curved crests located contiguously from the back of the rhinophoral sheaths to the caudal region, forming a characteristic ripple on each side of the notum. In front of the first pair of dorsal crests there are two small cerata facing outwards. In the dorsal crests the larger cerata correspond to those that are in the most dorsal position. The cerata are digitiform, wider at their base, with one or two constrictions and with a rather large apex. The cerata coloration follows the pattern of the body, but the amount of golden scores is smaller than in the rest of the body. The frontal veil is rounded and has two processes aimed at each side of the body, the shortest of which is in the inner position. The rhinophores are elongated (a quarter of the total length of the body) and have 8 to 9 inclined lamellae. The apex of the rhinophores extends slightly beyond the apical end of the rhinophoral sheaths. There is a small ridge on the back of each rhinophore. Rhinophoral sheaths are high and have two constrictions that favor a very characteristic central thickening. The rim of the rhinoform sheath is cup-shaped and has 6 or 7 processes similar to the cerata, with one or two constrictions, a broad base and a slightly bulging apex. Dorsally, in the cephalic region, there is a small tuberculate ridge arranged longitudinally that continues between the rhinophores to the beginning of the dorsal crest. The raised and wrinkled-looking pericardial area is located between the first and second pair of dorsal ridges. There could be a series of dorsal tubercles between the second and third dorsal ridge. The forefoot is broad, with two marked lobes, while the back of the foot is short and tappered. The genital pore is on the right side of the animal, between the rhinophore and the first dorsal ridge. The anus and renal pore are not visible in the studied specimens.

Biology
The specimens of this dendronotid are extremely cryptic on the substrate in which it is found: calcareous stones of sedimentary origin. It has been found in the intertidal zone near the Kirchenpaueria pinnata and Ventromma halecioides hydroids from which it is supposed to feed, although it has not been possible to observe this fact (García Gómez et al., 1990). The specimens found in Croatia were found 20 meters deep on the algae Cystoseira sp. close to hydroids of the Plumularioidea superfamily (Trainito et al., 2017). Its ability to live unnoticed is excellent because it allows small particles of the sediment to adhere to the cerata and rhinophores as part of its camouflage.

Etymology

  • Lomanotus. From Greek “loma”, ridge, edge  + “noton”, back.
  • Barlettai. In honor to the Italian malacologist Giorgio Barletta, 1938-1988, who published Malacofauna del Mar Rosso in 1970.

Distribution
It is an apparently rare species, but its abilities to camouflage with its habitat make it probably unnoticed. The first specimens were described on the coast of Huelva, Spain (García Gómez et al., 1990), having been cited later in the Costa Brava, Spain (L’Escala and Aiguafreda) in 2014 (Ballesteros et al., 2016) and Labin , Croatia in 2016 (Trainito et al., 2017). It has been recently found in Gran Canaria (Taliarte) on 08/08/2017 (Jose Juan Calderín Peñate, pers. comm.), the first report for the Canary Islands.

Known georeferenced records of the species: Lomanotus barlettai
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:

More pictures

Bibliography

Further reading

Cite this article as:

Ballesteros, Manuel, Enric Madrenas, Miquel Pontes (2012-2018) "Lomanotus barlettai" in OPK-Opistobranquis, Published: 12/11/2014, Accessed: 17/11/2018 at (https://opistobranquis.info/en/sMbEW)

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