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Runcinella thompsoni new species (Gastropoda: Opisthobranchia)is described on the basis of material collected in the GalapagosIslands. This new species differs from R. zelandica Odhner,1924, both in colour, reddish in the former, dark green withwhite freckles in the latter, and radular tooth morphology,mainly the first lateral teeth. The species is also comparedwith other red runcinids both from Atlantic and Pacific localities. (Received 28 October 1991; accepted 4 January 1993) 相似文献
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New information on Aegires ortizi Templado, Luque & Ortea,1987 is given, and two new species of the genus Aegires aredescribed, one from the Caribbean and one from the MediterraneanSea. A key to the North Atlantic species of Aegires is given. (Received 10 February 1989; accepted 11 July 1989) 相似文献
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CERVERA JUAN LUCAS; GOSLINER TERRENCE M.; GARCIA GOMEZ JOSE CARLOS; ORTEA JESUS ANGEL 《Journal of Molluscan Studies》2000,66(3):301-312
Berthella canariensis is described from Canary
Islands. Themantle is smooth and its ground colour is grey, with
black andopaque white spots scattered regularly all over the dorsal
surface.White spots are less abundant than black ones. The posterior
halfof the mantle has areas of with a paler ground colour that are
variablein size. Berthella canariensis has several features
that distinguishit from other described members of
Berthella. It had a broadradula with numerous teeth per
half-row. However, other aspectsof its anatomy, such as the absence
of a medial buccal glandand the presence of a tuberculate gill,
distinguish it fromother species with a broad radula. As the present species has two features found in some speciesof
Pleurobranchus and several new higher taxa have been
describedrecently, Willan's (1987) phylogenetic hypothesis was
re-analysed.This analysis largely supports the hypothesis presented
by Willan. The sister-group relationship of B. Canariensis
with B. californiais supported by two synapomorphies. The
relationship of thesetwo species to other species of
Berthella is poorly resolvedin the present analysis and
requires additional study of allmembers of the genus. Similarly,
questions of the monophylyof Bathyberthella, Polictenidia,
Parabathyberthella, Tomthompsoniaand Berthella require
the consideration of additional speciesand comparison with other
member of Berthella and Berthellina. Despite the
need for further study, the mohophyly of the cladecontaining
Bathyberthella, Polictenidia, Parabathyberthellais well
supported. Similarly, numerous synapomorphic featuresconfirm the
monophyly of the clade containing Bathyberthella,Polictenidia,
Parabathyberthella, Tomthompsonia, Berthellinaand
Berthella, and its sister-group relationship with the
Pleurobranchus. The present study reveals that the
Notaspidea have three distinctconfigurations of triaulic reproductive
systems, not previouslydifferentiated. (Received 19 January 1998; accepted 15 November 1999) 相似文献
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The correct identity of three chromodorid nudibranch species,Chromodoris clenchi, C. neona and C. binza is established onthe basis of material from the Caribbean Sea. These three speciesare compared with C. britoi, from the northeastern Atlanticand the Mediterranean Sea. All four species have a colour patternof cream with red (or yellow) lines and blue spots. (Received 30 March 1993; accepted 20 November 1993) 相似文献
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VALDES ANGEL; ORTEA JESUS; AVILA CONXITA; BALLESTEROS MANUEL 《Journal of Molluscan Studies》1996,62(1):1-31
Six valid species of the nudibranch genus Dendrodons Ehrenberg,1831 inhabit the Atlantic Ocean, including the Mediterraneanand Caribbean Seas. Dendrodons lumbata (Cuvier, 1804), Dendrodonsgrandiflora (Rapp, 1827), Dendrodons nigra (Stimpson, 1855)(immigrant from the Red Sea), Dendrodons krebsu (Mörch,1863), Dendrodoru senegalensis Bouchet, 1975 and Dendrodonswarta Marcus & Gallagher, 1976. Additional data about thebiology and geographical distribution of these species are presented.New evidence suggests that other species assigned to the genusDendrodons, Dendrodons racemosa Pruvot-Fol, 1951 and Dendrodonsminima Pruvot-Fol, 1951, must be included in the genus DoriopsillaBergh, 1880. Three new species of Dendrodoris are describedfrom the Northeastern Atlantic and West Africa;Dendrodons angolensis,Dendrodoris guineana and Dendrodons herytra. The variable external morphology makes species recognition difficult.Instead, the diagnostic characters utilised to separate speciesare the shape of the male cirrus hooks, the structure of thereproductive system and features of the egg-mass. (Received 25 April 1995; accepted 1 August 1995) 相似文献
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