Yellowish with blotches of other colours. Small amount of lilac on gills. Mixture of large and small, blunt tubercles on mantle. Length 22 mm. Menai Strait, Wales. June 2013.
FULL 9 POINT COMPARISON with J. tomentosa:
Doris pseudoargus Rapp, 1827.
1: Up to 120 mm long, but often similar size to Jorunna tomentosa.
2: Usually lemon yellow to red, frequently variegated with large blotches of colours such as purple, pink, red, brown, green and white. Plain yellow specimens superficially resemble J. tomentosa but often have a trace of purple on the gills see 26 Jorunna tomentosa & 27 Jorunna tomentosa
3: Variously sized, rounded, spiculose tubercles 27 Jorunna tomentosa give a stiff unyielding feel to the mantle.
4: Voluminous gills resembling curled kale. Often blotched with variable amount of lilac or purple 26 Jorunna tomentosa & 27 Jorunna tomentosa . The anal papilla may be brownish if gills are dark 28 Jorunna tomentosa
5: Base of gills not surrounded by collar-like sheath 28 Jorunna tomentosa
6: Short, thick, oral tentacles 29 Jorunna tomentosa
7: Convex body with raised profile 26 Jorunna tomentosa
8: Rhinophores have a translucent whitish, or slightly tinted, basal stem and a yellow or orange distal part with 20 or more lamellae, often with small flecks of opaque white. Conical, when retracted like on J. tomentosa, but much more slender than that species when extended 27.1 Jorunna tomentosa .
9: Posterior of foot protrudes a little 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. , reddish brown, grey-white, grey-cream, yellow 02 Jorunna tomentosa. , yellow cream 03 Jorunna tomentosa. , buff-orange, or white 04 Jorunna tomentosa. Small opaque white glandular structures near periphery of mantle 03 Jorunna tomentosa. . but sometimes not discernible 01 Jorunna tomentosa. . Usually, scattered small dark spots and a few dark blotches in a longitudinal row on each side 05 Jorunna tomentosa. ; sometimes blotches absent, or few and small 11 Jorunna tomentosa and occasionally the small spots are absent.
3: Mantle has crowded, small, match-like, retractile tubercles (caryophyllidia) 08 Jorunna tomentosa. 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. . 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 which closes over the gills when they are retracted into a pit 12 Jorunna tomentosa. .
6: Slender tapered oral tentacles 15 Jorunna tomentosa
7: Convex body with raised profile 07 Jorunna tomentosa .
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
9: Posterior of foot protrudes when in motion 19 Jorunna tomentosa.