Systematic review of the “Chromodoris quadricolor group” of East Africa,with descriptions of two new species of the genus Chromodoris Alder & Hancock, 1855 (Heterobranchia,Nudibranchia)

The similarities and variations in nudibranch species of the “Chromodoris quadricolor group” (Heterobranchia, Nudibranchia) have historically created identification problems among both nudibranch enthusiasts and experts. In this study, we combine molecular genetic analyses using one nuclear gene (histone h3) and two mitochondrial genes (cytochrome c oxidase subunit I and ribosomal 16S RNA) with morphological data to ameliorate the identification of specimens from this complex in East Africa. We include a detailed examination of polymorphisms within the group. As a result, Chromodoris boucheti is synonymized with Chromodoris lochi, and two new species are described, Chromodoris celinae sp. nov. and Chromodoris helium sp. nov. Chromodoris celinae sp. nov. is a common shallow water species that was previously misidentified as C. hamiltoni. Chromodoris helium sp. nov. is a species that appears to be restricted to depths below 30 m. This study agrees with previous research indicating the recent divergence of the genus Chromodoris.     

Chromodorid opisthobranch Mollusca from East Africa and the tropical West Pacific

Six species of Hypselodoris and three species of Chromodoris axe described from the coast of East Africa. Three species of Hypselodoris and one species of Chromodoris are new species. Two species of Chromodoris from the tropical West Pacific are also described. The eleven species fall into three groups of similarly coloured species.
Hypselodoris nigrostriata and a new species of Hypselodoris are compared with H. infucata, H. festiva, H. obscura and two unnamed species from the literature. It is concluded that all these are distinct species.
H. nigrolineata and two new species, are compared with H. lineata and H. hilaris and all are considered distinct.
H. regina, Chromodoris quadricolor, C. africana, C. elisabethina, C. magnified and a new species of Chromodoris, are compared with C. westraliensis and two unnamed species from the literature. All these species are considered distinct.
All other names for forms falling into these three colour groups are considered synonyms of one or other of the above named species. Full synonymies are given.     

NORTH ATLANTIC NUDIBRANCHS OF THE CHROMODORTS CLENCHI COLOUR GROUP (OPISTHOBRANCHIA: CHROMODORIDIDAE)

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)     

The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: Chromodoris epicuria, C. aureopurpurea, C. annulata, C. coi and Risbecia tryoni colour groups

Twenty-five species of chromodorid nudibranchs from the Indo-West Pacific are described including nine which are new to science. There are six new species of Chromodoris , two of Nounea and a new species which forms the type of a new monotypic genus. Of the other species discussed in this paper, ten are species of Chromodoris , five Risbecia and one Digidentis. Species with the following colour patterns are discussed: white with orange or yellow spots; white with yellow (or orange) and purple spots; white with purple spots or patches and mantle border; white with a sinuous submarginal brown band. A full review of the relevant literature is included as is a discussion on Indian Ocean and West Pacific species pairs.     

The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: Chromodoris splendida, C. aspersa and Hypselodoris placida colour groups

Eleven species of Chromodoris, two species of Hypselodoris, three species of Mexichromis and one species of Noumea are described from the Indo-West Pacific, of which four species of Chromodoris and one of Mexichromis are new species. All species have a colour pattern dominated by red, purple or black spots. All previously described species with similar colour patterns, from both the Indo-West Pacific and other regions, are discussed.     

Chromodorid opisthobranch Mollusca from the Indo-West Pacific

Seven species of Chromodoris and one of Hypselodoris are described from collections from the Indo-West Pacific. Of the species of Chromodoris, two are from Fiji, two are from the Gulf of Kutch in north-western India, one being a new species, and three are from the coast of East Africa. Hypselodoris infucata is described from both the Gulf of Kutch and Zanzibar.
C. youngbleuthi and C. inopinata are compared with published accounts of five other species with red reticulate markings (C. tinctoria, C. alderi, C. reticulata, C. obsoleta and Risbecia reticulata) and it is suggested that apart from C. alderi, which is considered a junior synonym of C. tinctoria, all these species are distinct.
C. inornata Pease, which has often been confused with other forms with red or purple spots, is compared with published information on eight other species (C. petechialis, C. daphne, C. festiva (Angas), C. splendida, C. tenuis, C. tumulifera, C. splendens and C. inornata Gohar & Soliman). It is suggested that all these forms are distinct and that C. inornata Gohar & Soliman, which is distinct from C. inornata Pease, should take the name Chromodoris dollfusi Pruvot-Fol 1933.     

Chromodorid nudibranchs from eastern Australia (Gastropoda, Opisthobranchia)*

Collections of nudibranch gastropods made in 1968 and 1969 are described. All the 11 eastern Australian species of Casella, Hypselodoris and Chromodoris obtained are fully illustrated by line diagrams, photographs and water-colours. Two species new for Australia are described, and nine others are re-described. A list of the chromodoridiform species reliably recorded from Australian waters concludes the paper.     

The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: Chromodoris aureomarginata, C. verrieri and C. fide lis colour groups

Nineteen species of chromodorid nudibranchs are described including three new species of Chromodoris , two of Glossodoris and one each of Noumea, Cadlina and Thorunna from the Indo-West Pacific. The colour of all species is white with either a single yellow or gold band at the edge of the mantle or a double band of red and yellow, or orange and red or purple. All previously described species with similar colour patterns, from both the Indo-West Pacific and other regions are discussed.     

The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: Noumea purpurea and Chromodoris decora colour groups

Nine species of chromodorid nudibranchs are described including a new species of Durvilledoris and a new species of Noumea. The Noumea purpurea colour group consists of five species with a pink, purple or reddish-purple background and a median white line, sometimes broken. The Chromodoris decora colour group also has white longitudinal lines with a pinkish background colour and usually an orange border. A non-chromodorid juvenile, probably a species of Hexabranchus , is compared with the species of the C. decora colour group.     

CELL PENETRATION BY ACIDS : V. NOTE ON THE ESTIMATION OF PERMEABILITY CHANGES.

The penetration of acid into mantle tissue of Chromodoris zebra is accelerated after local faradic stimulation, and is retarded by brief treatment with anesthetic solutions. The spontaneous outward diffusion of intracellular pigment is an inadequate criterion of "permeability." Outward diffusion of pigment and penetration of acid are both facilitated when the tissue is artificially put under tension.     

Opisthobranchiate Mollusca from Ghana: Chromodorididae

Nine species of the opisthobranch family Chromodorididae are described from Ghana: Cadlina evelinae Marcus; C. rumia Marcus; C. dubia sp. nov.; Chromodoris ghanensis (Edmunds); C. kpone sp. nov.; C. luleorosea (Rapp); Hypselodoris tana sp. nov.; H. bilineata (Pruvot-Fol) and Mexichromis tricolor (Cantraine). The small number of species found belonging to this warm-water family is attributed to the cold water of the Benguela current.     

The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: further species of Glossodoris, Thorunna and the Chromodoris aureomarginata colour group

Nineteen species of chromodorid nudibranchs from the Indo-West Pacific are described including 12 new to science. There are four new species of Glossodoris and one new species of Thorunna . The anatomy of two other species of Thorunna, T. daniellae and T. florens , is described and the problematical 'Hypselodoris' kulonba Burn, 1966 is shown to belong to the genus Digidentis. New species of chromodorids which are white with a yellow or red margin. or markings. from the genera Durvilledoris. Noumea and Cadlina are also described. Notes on colour variation in Glossodoris pallida and Chromodoris splendida are included.     

Opisthobranchiate Mollusca from Tanzania (Suborder:Doridacea)

Twenty-two species of Doridacea are described from the vicinity of Dar es Salaam, Tanzania. None is new to science, but one species of the genus Gymnodoris was too immature to be fully identified. Ten of the 22 species are known from the Hawaiian Islands, indicating that many species of dorid occur throughout the Indian Ocean and the Pacific as far as Hawaii. One species (Jorunna tomentosa) appears to be cosmopolitan, and two may possibly be confined to the coast of Africa (Chromodoris annulata and C. vicind).
Sixty-nine species of dorid have already been reported from Tanzania by Eliot. Nine species in the present collection were not found by him, so 78 are now known from the area.     

EXTRA-CAPSULAR YOLK BODIES IN THE EGG MASSES OF SOME TROPICAL OPISTHOBRANCHIA

Seventeen species of opisthobranch molluscs from Enewetak, MarshallIslands were found to deposit bodies of yolk within their gelatinousegg masses external to the capsules which surround the ova.These observations bring the total number of opisthobranch speciesin which extra-capsular yolk is known to 26. This study reviewsprevious reports of extra-capsular yolk and contributes newdata on the egg masses and developmental characteristics ofspecies in which it is known to occur. The various types ofyolk body found are detailed and categorized, and original observationson the deposition of yolk bodies and their fate during, andsubsequent to embryonic development presented. To date, extra-capsular yolk bodies have been found only withinthe egg masses of species of Chromodoris and Cadlinella (Nudibranchia:Chromodorididae), Elysia (Sacoglossa: Elysiidae), and Bosellia(Sacoglossa: Polybranchiidae). Three types of yolk body arerecognized: (1) cap-like yolk bodies associated with individualcapsules, (2) discrete yolk bodies strewn throughout the eggmass, and (3) continuous or discontinuous yolk strings. Direct consumption of yolk bodies by newlyhatched veligers ofChromodoris albopunctatus (Garrett) is described. In most otherspecies, the yolk disappears during the course of developmentand is probably of nutritive value to the embryos. The availabledata suggest that chromodorid species which utilize extra-capsularyolk during the course of development produce relatively largerlarvae than species with comparably sized ova that do not. (Received 25 November 1982;     

OXIDATION-REDUCTION POTENTIALS AND THE POSSIBLE RESPIRATORY SIGNIFICANCE OF THE PIGMENT OF THE NUDIBRANCH CHROMODORIS ZEBRA

1. Oxidation-reduction potential methods have been applied to a study of the blue-purple pigment present in solution in the blood and in the tissue cells of the nudibranch Chromodoris zebra. 2. The blue-purple pigment and its yellow reduction product form a reversible system whose E_o'' = x0.102 volts at pH 7.0 and whose valence change from oxidant to reductant appears to be one. 3. The system is unlike oxyhemoglobin-hemoglobin in the mode of oxygen transfer. Its rôle as a possible respiratory material is discussed.     

STUDIES IN SOME FOLIOSE RED ALGAE OF THE PACIFIC COAST. III. DUMONTIACEAE,WEEKSIACEAE, KALLYMENIACEAE1

The female reproductive structures and their development, and the vegetative structure are studied in 17 species of red algae in the Cryptonemiales (Rhodophyceae). Three genera, Weeksia, Constantinea, and the type species of Leptocladia, are removed from the Dumontiaceae to a newly created family, the Weeksiaceae, because of differing postfertilization events leading to the development of the gonimoblast from a cell of the carpogonial branch. Three genera of Dumontiaceae are studied: Pikea, including P. californica, the type species, and Pikea robusta a newly described species; Dilsea californica, and a newly described species of Neodilsea, a genus heretofore known only from the northwestern Pacific. Two transfers are made from the genus Leptocladia, 1 to Farlowia, as F. conferta, and 1 to Rhodophyllis (Gigartinales) as R. peruviana. Three species in the Kallymeniaceae are redescribed: Kallymenia pacifica, a rare and nearly unknown species from southern California and adjacent Pacific Mexico; K. norrisii from central California; and K. oblongifructa from Washington, Oregon, and northern California.