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Janolus

Janolus is a genus of small to large sea slugs, or more accurately nudibranchs, marine gastropod mollusks, in the family Janolidae. The name Janolus is derived from the two-headed god Janus, in ancient Roman mythology.

Description
Adult individuals of Janolus species can be between 2.5 cm to 8 cm long, depending on the species. They are semi-translucent and the body is covered in short cerata. ==Distribution==
Distribution
Janolus species are found in many areas world-wide, including Europe, Australia, Japan and Africa. == Ecology ==
Ecology
Habitat This genus of nudibranch is found in shallow and subtidal waters. Feeding habits Janolus species feed on Bryozoa, moss animals. Predators In California, Navanax is a known predator of Janolus. Navanax tracks the slime of Janolus by using chemoreceptors. When Janolus is about to be caught, it rolls into a ball, leaving its cerata exposed. ==Species==
Species
Species in the genus Janolus include: • Janolus anulatus Camacho-Garcia & Gosliner, 2006 • Janolus australis Bergh, 1884 • Janolus chilensis M.A. Fischer, Cervera & Ortea, 1997 • Janolus comis Er. Marcus, 1955 • Janolus eximius Miller & Willan, 1986 • Janolus faustoi Ortea & Llera, 1988 • Janolus flavoanulatus Pola & Gosliner, 2019 • Janolus hyalinus (Alder and Hancock, 1854) • Janolus ignis Miller & Willan, 1986 • Janolus incrustans Pola & Gosliner, 2019 • Janolus kinoi Edmunds & Carmona, 2017 • Janolus mirabilis Baba & Abe, 1970 • Janolus mokohinau Miller & Willan, 1986 • Janolus mucloc (Er. Marcus, 1958) • Janolus rebeccae Schrödl, 1996 • Janolus savinkini Martynov & Korshunova, 2012 • Janolus toyamensis Baba & Abe, 1970 • Janolus tricellariodes Pola & Gosliner, 2019 ;Species brought into synonymy: • Janolus barbarensis (J. G. Cooper, 1863):synonym of Antiopella barbarensis (J. G. Cooper, 1863) • Janolus capensis Bergh, 1907:synonym of Antiopella capensis (Bergh, 1907) (original combination) • Janolus costacubensis Ortea & Espinosa, 2000:synonym of Janolus comis Er. Marcus, 1955 • Janolus cristatus (Delle Chiaje, 1841):synonym of Antiopella cristata (Delle Chiaje, 1841) • Janolus flagellatus Eliot, 1906:synonym of Janolus hyalinus (Alder & Hancock, 1854) (dubious synonym) • Janolus fuscus O'Donoghue, 1924:synonym of Antiopella fusca (O'Donoghue, 1924) (original combination) • Janolus longidentatus Gosliner, 1981:synonym of Antiopella longidentata (Gosliner, 1981) (original combination) • Janolus nakaza (Gosliner, 1981):synonym of Bonisa nakaza Gosliner, 1981 • Janolus novozealandicus (Eliot, 1907):synonym of Antiopella novozealandica Eliot, 1907 • Janolus praeclarus (Bouchet, 1975):synonym of Antiopella praeclara Bouchet, 1975 ==References==
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