Tag Archives: nudibranch

Cuthona divea

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From Marine Life of the Pacific by Lamb and Hanby, we see that the rose-pink cuthona, or Correa’s aeolid Is a very bushy species,( living fro intertidal to 20 metres depth from BC to California. The first three rows of cerata (gills) begin ahead of its rhinophores (sensory organs).It feeds on hydractinid hydroids whose color it closely matches. Macro image by Ryan Murphy

Domain Eukarya
Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Order Nudibranchia
Family Tergipedidae
Genus Cuthona
Species divae
Common Name: Rose-pink Cuthona (Er.Marcus,1961
Other Members of the Phylum Arthropoda at Race Rocks 
taxonomyiconReturn to the Race Rocks Taxonomy
and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams.

 January 2011 Garry Fletcher

Dirona albolineata THE RACE ROCKS TAXONOMY

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View this and other underwater images at Ryan’s Flickr site.

Adam Harding took this image of Dirona albolineata in August of 2010

Domain Eukarya
Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Subclass: Heterobranchia
Order Nudibranchia
Suborder: Cladobranchia
Family Dironidae
Genus Dirona
Species D.albolineata
MacFarland and Cockerell & Eliot, 1905)
Common Name: Alabaster Nudibranch
Other molluscs at Race Rocks

taxonomyiconReturn to the Race Rocks Taxonomy and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams.

Garry Fletcher

Cadlina luteomarginata THE RACE ROCKS TAXONOMY

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We see these occasionally when diving at Race Rocks.

Scientific classification
Domain: Eukarya
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Superfamily: Doridoidea
Family: Cadlinidae
Genus: Cadlina
Species: Cadlina luteomarginata

You may also be interested in

Morphology and biological roles of spicule networks in Cadlina luteomarginata (Nudibranchia, Doridina (MacFarland, 1966)

First published: 23 August 2006

 

https://doi.org/10.1111/j.1744-7410.2006.00055.x

Abstract

Many cryptobranch dorid nudibranchs contain innumerable calcareous spicules, yet the function of these elements is unknown. Two possible roles are defense against predators and structural support. In one dorid, Cadlina luteomarginata, whole‐mount and thin‐section staining revealed an intricate network of spicule tracts and connective tissue ramifying throughout the body, with muscle fibers associated with this spicule/connective tissue matrix and inserting into it. Spicules were present in high concentrations in all areas of the body, but highest in exterior mantle tissue. Relative investment increased isometrically with body size for most body regions, in contrast to the positively allometric investment seen in prosobranch shells. Bioassays with artificial food indicated that spicules alone did not deter generalist crabs and anemones, and only weakly increased the deterrence of secondary chemicals to anemones. Thus, while nudibranch spicules may serve as a defense against other predators, their primary role may be in body support.

Other molluscs at Race Rocks

taxonomyiconReturn to the Race Rocks Taxonomy and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams.

Garry Fletcher

&nbs

Diaulula odonoghuei: THE RACE ROCKS TAXONOMY

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We had previously called this species D. sandiegensis, but we changed it because of this entry in Wikipedia Describing D.sandiegensis;”This nudibranch grows to about 100 mm (4″) in length. The background color can be white or any shade of yellow to a yellowish brown, and it has characteristic markings consisting of a few brown rings or irregular spots. Specimens with more numerous spots are Diaulula odonoghuei.” Wikipedia

Domain Eukarya
Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Superfamily Doridoidea
Family Discodorididae
Genus Diaulula
Species D.odonoghuei
Common Name: The spotted leopard dorid

Other molluscs at Race Rocks

taxonomyiconReturn to the Race Rocks Taxonomy and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams.

Garry Fletcher

Geitidoris heathi : (Heath’s dorid)– The Race Rocks Taxonomy

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Geitidoris heathi (Heath’s dorid) photo by Rayn Murphy

Geitidoris heathi (Heath’s dorid) Photo by Ryan Murphy

Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Opisthobranchia
Suborder: Nudibranchia
Superfamily: Doridoidea
Family: Discodorididae
Genus: Geitodoris
Species: G. heathi
Geitodoris heathi (MacFarland, 1905)
Synonyms Discodoris heathi

Other Members of the Phylum Mollusca at Race Rocks.

taxonomyiconReturn to the Race Rocks Taxonomy
and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams.  Oct 2010 , by Ryan Murphy

 

Aldisa tara : The Race Rocks Taxonomy

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rmaldisatara

Aldisa tara photo by Ryan Murphy

 

Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Order: Nudibranchia
Suborder: Doridina
Superfamily: Doridoidea
Family: Cadlinidae
Genus: Aldisa
Species:
A. tara
Binomial name
Aldisa tara

Millen, 1984

Tentative identification only.. This is a fairly rare nudibranch, only named recently.

Other molluscs at Race Rocks

taxonomyiconReturn to the Race Rocks Taxonomy and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams.

Ryan Murphy, 2010

Hermissenda crassicornis: Opalescent sea slug–The Race Rocks Taxonomy

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rmhermissendacrassicornis3

Hermissenda crassicornis
Photo by Ryan Murphy

Ryan Murphy took these three photos of Hermissenda crassicornis, the opalescent-sea-slug while diving at Race Rocks. Note the bright stripe on the forehead between the sensory rhinophores.

Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Superfamily: Aeolidioidea
Family: Facelinidae
Genus: Hermissenda
Species: H. crassicornis
Hermissenda crassicornis Eschscholtz, 1831Return to the Race Rocks Taxonomy Index and gallery

This file is provided as part of a collaborative effort by the students, faculty, volunteers and staff of Lester B. Pearson College– Oct 2010 , by Ryan Murphy

Dendronotus diversicolor: coloured dendronotid–The Race Rocks Taxonomy

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rm241010dalbusmetandl
This image by Ryan Murphy is rather stunning because it shows the nudibranch in contact with the colonial tunicate Metandrocarpa sp.
The identifying features of Dendronotus diversicolor are the 4 pairs of gills and a white line that goes from the last gill pair to the end of the tail.

ah06610dendrotus

This is a rather unique picture by Ryan Murphy of breeding nudibranchs

Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Superfamily: Tritonioidea
Family: Dendronotidae
Genus: Dendronotus
Species: diversicolor
Alder & Hancock, 1845

 

dendronotusdivers

Dendrotus diversicolor photo by Adam Harding

 

Other Members of the Phylum Mollusca at Race Rocks.

taxonomyiconReturn to the Race Rocks Taxonomy
and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams.  Ryan Murphy

 

Flabellina trilineata The Race Rocks Taxonomy

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Domain Eukarya
Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Subclass: Opisthobranchia
Order Nudibranchia
Family Polyceratidae
Genus Flabellina
Species trilineata
Common Name: Nudibranch

Other molluscs at Race Rocks

taxonomyiconReturn to the Race Rocks Taxonomy and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams.

Ryan Murphy

Melibe leonina: Hooded nudibranch–The Race Rocks Taxonomy

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melibe3This is a hooded nudibranch (Melibe leonina)… a predatory sea slug that ‘swims’ more often than it crawls. The front end (on the right) has rounded sensory organs called rhinophores that look a bit like elephant ears. In the other picture you can see the head has a big mouth and that can expand to capture all sorts of little critters. The branching structures are ramifications of the digestive system (hepatic diverticula).

melibe1

Melibe leonina photo by Ryan Murphy

 

View  other underwater images at Ryan’s Flickr site.

melibe2

Melibe leonina photo by Ryan Murphy

Domain : Eukarya
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Opisthobranchia
Order: Nudibranchia
Superfamily: Tritoniodea
Family: Tethydidae
Genus: Melibe
Species: leonina Gould, 1852
Common Name: Hooded Nudibranch

Other molluscs at Race Rocks

taxonomyiconReturn to the Race Rocks Taxonomy and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams. Ryan Murphy