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Journal of Molluscan Studies 2008 74(2):143-181; doi:10.1093/mollus/eyn002
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© The Author 2008. Published by Oxford University Press on behalf of The Malacological Society of London, all rights reserved

Systematic revision of Jorunna Bergh, 1876 (Nudibranchia: Discodorididae) with a morphological phylogenetic analysis

Yolanda E. Camacho-García1 and Terrence M. Gosliner2

1Museo de Zoología, Escuela de Biología, Universidad de Costa Rica, Apdo 2060, San Pedro de Montes de Oca, San José, Costa Rica; and 2Department of Invertebrate Zoology and Geology, California Academy of Sciences, 875 Howard Sreet, San Francisco, CA 94103, USA

Correspondence: Y. E. Camacho-García; e-mail: ycamacho_99{at}yahoo.com


  Abstract

The genus Jorunna is characterized by a dorsum covered with caryophyllidia, a prostate with two sections, a penis usually unarmed but occasionally armed with hooks, a copulatory spine, the presence of an accessory gland and a labial cuticle smooth or armed with jaw elements. The examination of 216 non-type specimens, 30 types, and a review of the literature show that there are 16 valid species of the genus Jorunna: J. tomentosa (Cuvier, 1804); J. funebris (Kelaart, 1859); J. pantherinaAngas, 1864; J. rubescens (Bergh, 1876); J. labialis (Eliot, 1908); J. parva (Baba, 1938); J. spazzola (Marcus, 1955); J. hartleyi (Burn, 1958); J. alisonaeMarcus, 1976; J. lemchei (Marcus, 1976); J. evansi (Eliot, 1906); J. pardusBehrens & Henderson, 1981; J.ramicolaMiller, 1996 and J. onubensis Cervera, García-Gómez & García, 1986. In addition, two new species from the Eastern Pacific are described: J. osae n. sp. and J. tempisquensis n. sp. We propose two new combinations: Jorunna parva and J. evansi. New records for the genus Jorunna are provided from Italy, Algeria, Seychelles, Madagascar, Thailand, Marshall Islands, New Caledonia, Île de la Réunion, Sudan, Papua New Guinea, Indonesia, Panama, Costa Rica, Bahamas, and Southern Mexico. We present the first preliminary phylogenetic analysis of this cryptobranch dorid genus, based on morphological anatomical data, and discuss the biogeography and evolution of several characters in this group. The phylogeny supports the hypothesis that the genus Jorunna is a monophyletic group and shows that Kentrodoris is nested within it.

(Received 31 December 2004; accepted 10 January 2008)


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