Mantle has plush cover of match-like tubercles. Yellow-cream rhinophore with no dark spots (1). Raised basal rim closes over the gills when they are retracted into a pit (2). August 2016. Skye, Scotland © J. Anderson.
FULL 9 POINT COMPARISON with J. tomentosa:
Jorunna artsdatabankia Neuhaus, Rauch, Bakken, Picton, Pola & Malaquias, 2021. [Early records from Norway, North Sea (offshore), Scotland and N. Ireland] see also 20. 20.2 Jorunna tomensosa album, COMPARISON image of Jorunna artsdatabankia
1: Up to 40 mm long (Neuhaus et al, 2021).
2: Dorsally, plain yellow to white with sparse, irregularly scattered, small brown spots. Opaque white glands on periphery of mantle, but may not be discernible.
3: Mantle has crowded, small, match-like, retractile tubercles (caryophyllidia) with a ring of sharp projecting spicules surrounding the rounded apex. They are longer than on J. tomentosa, so may look more plush in close view.
4: Gills are concolorous with, but slightly brighter than, the mantle. They lack any dark dots.
5: Base of extended gills surrounded by a raised rim which closes over the gills when they are retracted into a pit.
6: Slender tapered oral tentacles.
7: Convex body with raised profile.
8: Rhinophores yellow-cream to white without any dark dots on the lamellae (Neuhaus et al., 2021).
9: Posterior of foot protrudes at the posterior slightly, or not at all, when in motion.
Jorunna tomentosa
1: Length up to 30 mm (Neuhaus et al, 2021), 55 mm (Thompson and Brown, 1984), often a similar size to Doris pseudoargus.
2: Dorsally, sandy-brown 01 Jorunna tomentosa. Length 60 mm. Intertidal. Orkney. April 1975. , reddish brown, grey-white, grey-cream, yellow 02 Jorunna tomentosa. , yellow cream 03 Jorunna tomentosa. Length 55mm. Menai Strait, Wales. June 2013. , buff-orange, or white 04 Jorunna tomentosa. West Anglesey, Wales. March 2014.. Small opaque white glandular structures near periphery of mantle 03 Jorunna tomentosa. Length 55mm. Menai Strait, Wales. June 2013. but sometimes not discernible 01 Jorunna tomentosa. Length 60 mm. Intertidal. Orkney. April 1975. . Usually, scattered small dark spots and a few dark blotches in a longitudinal row on each side 05 Jorunna tomentosa. Split, Croatia. November 2012. © J. Prkić . ; sometimes blotches absent, or few and small 11 Jorunna tomentosa. 55mm long. Menai Strait, Wales. June, 2013. and occasionally the small spots are absent.
3: Mantle has crowded, small, match-like, retractile tubercles (caryophyllidia) 08 Jorunna tomentosa. Rhinophores from 34 mm and 55 mm long animals. Menai Strait, Wales. with a ring of sharp projecting spicules surrounding the rounded apex. Body has velvety appearance and soft feel.
4: Large yellow-cream to grey gills around brown anal papilla 02 Jorunna tomentosa. & 04 Jorunna tomentosa. West Anglesey, Wales. March 2014. . Gills are often paler than the mantle and sometimes have dark dots.
5: Base of extended gills surrounded by distinct collar-like sheath 09 Jorunna tomentosa, gills and gill sheath. Lengths of animals 55mm and 43mm. Anglesey, Wales. which closes over the gills when they are retracted into a pit 12 Jorunna tomentosa. Length of animal 43mm. Menai Strait, Wales. February 2014. .
6: Slender tapered oral tentacles 15 Jorunna tomentosa. Animal 55mm long. Menai Strait, Wales. June, 2013. .
7: Convex body with raised profile 07 Jorunna tomentosa. West Anglesey, Wales. March 2014. .
8: Short, stout rhinophores have a translucent whitish, or slightly tinted, basal stem and a conical, lamellated, yellow-cream to grey, distal part bearing red to brown pigment dots/marks 08 Jorunna tomentosa. Rhinophores from 34 mm and 55 mm long animals. Menai Strait, Wales. .
9: Posterior of foot protrudes when in motion 19 Jorunna tomentosa. Length 43mm. Menai Strait, Wales. February 2014. .