34 Jorunna tomentosa album. Comparison image of Jorunna onubensis
Body pinkish brown. Found under a stone at 14 m depth. Cadaqués, Catalonia. October 2007. © M. Pontes.
Jorunna onubensis Cervera, García-Gómez & García, 1986,
is very similar to J. tomentosa; reliable identification of this species requires examination of dissected anatomical features and, ideally, D.N.A sequencing. The external features below are described in the original description of J. onubensis [based on four intertidal specimens from Huelva, southern Spain]. The features illustrated in this Flickr account are on a specimen from Catalonia of J. onubensis identified by Miquel Pontes and confirmed by Prof. J. Lucas Cervera. Many features are common to both J. onubensis and J. tomentosa; confirmation by dissection and/or D.N.A, sequencing is desirable. Specimens of J. onubensis photographed by one of the authors of its first published description, J. C. García Gómez, can be seen at opistobranquis.info/en/guia/nudibranchia/euctenidiacea/do...
and other images by L. Sánchez-Tocino at
wpd.ugr.es/~litoraldegranada/el-litoral/el-litoral-sumerg...
It has been recorded from Spain, Portugal, Madeira and the Canary Islands.
FULL 9 POINT COMPARISON with J. tomentosa:
Jorunna onubensis
1: 12mm to 18mm long (four specimens March & April 1984). Up to 55mm long (Sánchez-Tocino, accessed February 2018).
2: Light brown, often slightly pinkish [sometimes grey?]. Sometimes with dark, greyish or greyish-brown, blotches of varying size. [ il dorso dell'animale appare marrone chiaro, leggermente rosaceo in alcuni esemplari. Su questa colorazione di fondo appaiono macchie grigiastre o marrone grìgiastro chiaro di dimensioni variabili. ]
Small opaque white marks near periphery of mantle 36Jt flic.kr/p/22B7b8M .
3: Mantle has crowded, match-like, retractile tubercles with skirt of sharp projecting spicules (caryophyllidia) 37Jt flic.kr/p/22B7aUv ; similar to J. tomentosa, some with opaque, bright-white apex 37Jt flic.kr/p/22B7aUv .
4: The translucent, almost colourless, gills have a fine brown punctuation, hardly distinguishable to the naked eye 38Jt flic.kr/p/22B7aQx & 39Jt flic.kr/p/22B7a9H . The end of the anal papilla is brown with whitish striations that subdivide it into unequal parts 38Jt flic.kr/p/22B7aQx
5: Base of extended gills surrounded by collar-like sheath 39Jt flic.kr/p/22B7a9H which closes over the gills when they are retracted into a pit 35Jt flic.kr/p/22B7bHp
6: Slender tapered oral tentacles, similar to J. tomentosa.
7: Convex body with raised profile, similar to J. tomentosa.
8: Short rhinophores are whitish, sometimes with strip of dark brown subapically. Basal stem transparent. About 15 lamellae form conical distal half.
9: Posterior of foot protrudes slightly 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 1Jt flic.kr/p/EjpcXr , reddish brown, grey-white, grey-cream, yellow 2Jt flic.kr/p/K2ALfV , yellow cream 3Jt flic.kr/p/EjpceH , buff-orange, or white 4Jt flic.kr/p/K2AJ14. Small opaque white glandular structures near periphery of mantle 3Jt flic.kr/p/EjpceH but sometimes not discernible 1Jt flic.kr/p/EjpcXr . Usually, scattered small dark spots and a few dark blotches in a longitudinal row on each side 5Jt flic.kr/p/EjpbfP ; sometimes blotches absent, or few and small 11Jt flic.kr/p/22B75ok and occasionally the small spots are absent.
3: Mantle has crowded, small, match-like, retractile tubercles (caryophyllidia) 8Jt flic.kr/p/K2AFXB 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 2Jt flic.kr/p/K2ALfV & 4Jt flic.kr/p/K2AJ14 . Gills are often paler than the mantle and sometimes have dark dots.
5: Base of extended gills surrounded by distinct collar-like sheath 9Jt flic.kr/p/22B7oGe which closes over the gills when they are retracted into a pit 12Jt flic.kr/p/22B7nRM .
6: Slender tapered oral tentacles 15Jt flic.kr/p/K2AEjX .
7: Convex body with raised profile 7Jt flic.kr/p/22B7pn2 .
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 8Jt flic.kr/p/K2AFXB .
9: Posterior of foot protrudes when in motion 19Jt flic.kr/p/22B7iPD .
Full SPECIES DESCRIPTION: flic.kr/p/K2ALfV
Key id. features: flic.kr/p/EjpcXr
Sets of OTHER SPECIES:
www.flickr.com/photos/56388191@N08/collections/
34 Jorunna tomentosa album. Comparison image of Jorunna onubensis
Body pinkish brown. Found under a stone at 14 m depth. Cadaqués, Catalonia. October 2007. © M. Pontes.
Jorunna onubensis Cervera, García-Gómez & García, 1986,
is very similar to J. tomentosa; reliable identification of this species requires examination of dissected anatomical features and, ideally, D.N.A sequencing. The external features below are described in the original description of J. onubensis [based on four intertidal specimens from Huelva, southern Spain]. The features illustrated in this Flickr account are on a specimen from Catalonia of J. onubensis identified by Miquel Pontes and confirmed by Prof. J. Lucas Cervera. Many features are common to both J. onubensis and J. tomentosa; confirmation by dissection and/or D.N.A, sequencing is desirable. Specimens of J. onubensis photographed by one of the authors of its first published description, J. C. García Gómez, can be seen at opistobranquis.info/en/guia/nudibranchia/euctenidiacea/do...
and other images by L. Sánchez-Tocino at
wpd.ugr.es/~litoraldegranada/el-litoral/el-litoral-sumerg...
It has been recorded from Spain, Portugal, Madeira and the Canary Islands.
FULL 9 POINT COMPARISON with J. tomentosa:
Jorunna onubensis
1: 12mm to 18mm long (four specimens March & April 1984). Up to 55mm long (Sánchez-Tocino, accessed February 2018).
2: Light brown, often slightly pinkish [sometimes grey?]. Sometimes with dark, greyish or greyish-brown, blotches of varying size. [ il dorso dell'animale appare marrone chiaro, leggermente rosaceo in alcuni esemplari. Su questa colorazione di fondo appaiono macchie grigiastre o marrone grìgiastro chiaro di dimensioni variabili. ]
Small opaque white marks near periphery of mantle 36Jt flic.kr/p/22B7b8M .
3: Mantle has crowded, match-like, retractile tubercles with skirt of sharp projecting spicules (caryophyllidia) 37Jt flic.kr/p/22B7aUv ; similar to J. tomentosa, some with opaque, bright-white apex 37Jt flic.kr/p/22B7aUv .
4: The translucent, almost colourless, gills have a fine brown punctuation, hardly distinguishable to the naked eye 38Jt flic.kr/p/22B7aQx & 39Jt flic.kr/p/22B7a9H . The end of the anal papilla is brown with whitish striations that subdivide it into unequal parts 38Jt flic.kr/p/22B7aQx
5: Base of extended gills surrounded by collar-like sheath 39Jt flic.kr/p/22B7a9H which closes over the gills when they are retracted into a pit 35Jt flic.kr/p/22B7bHp
6: Slender tapered oral tentacles, similar to J. tomentosa.
7: Convex body with raised profile, similar to J. tomentosa.
8: Short rhinophores are whitish, sometimes with strip of dark brown subapically. Basal stem transparent. About 15 lamellae form conical distal half.
9: Posterior of foot protrudes slightly 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 1Jt flic.kr/p/EjpcXr , reddish brown, grey-white, grey-cream, yellow 2Jt flic.kr/p/K2ALfV , yellow cream 3Jt flic.kr/p/EjpceH , buff-orange, or white 4Jt flic.kr/p/K2AJ14. Small opaque white glandular structures near periphery of mantle 3Jt flic.kr/p/EjpceH but sometimes not discernible 1Jt flic.kr/p/EjpcXr . Usually, scattered small dark spots and a few dark blotches in a longitudinal row on each side 5Jt flic.kr/p/EjpbfP ; sometimes blotches absent, or few and small 11Jt flic.kr/p/22B75ok and occasionally the small spots are absent.
3: Mantle has crowded, small, match-like, retractile tubercles (caryophyllidia) 8Jt flic.kr/p/K2AFXB 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 2Jt flic.kr/p/K2ALfV & 4Jt flic.kr/p/K2AJ14 . Gills are often paler than the mantle and sometimes have dark dots.
5: Base of extended gills surrounded by distinct collar-like sheath 9Jt flic.kr/p/22B7oGe which closes over the gills when they are retracted into a pit 12Jt flic.kr/p/22B7nRM .
6: Slender tapered oral tentacles 15Jt flic.kr/p/K2AEjX .
7: Convex body with raised profile 7Jt flic.kr/p/22B7pn2 .
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 8Jt flic.kr/p/K2AFXB .
9: Posterior of foot protrudes when in motion 19Jt flic.kr/p/22B7iPD .
Full SPECIES DESCRIPTION: flic.kr/p/K2ALfV
Key id. features: flic.kr/p/EjpcXr
Sets of OTHER SPECIES:
www.flickr.com/photos/56388191@N08/collections/