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Wolfgang Mielke

A new canuellid, Microcanuella bisetosa gen. n., sp. n., was collected on the Pacific coast (Gulf of Nicoya) of Costa Rica. Though the male is still unknown, a new genus is established, mainly because of the reduced armature of P1, P4, and P5. The small-sized M. bisetosa sp. n. is a mesopsammic species, inhabiting the interstices of coarse sediments of a beach slope.

R.W.M. van Soest, S. Zea and M. Kielman

New sponge species belonging to the closely related fistular genera Zyzzya, Cornulella, Damiria, and Acheliderma are described from reef habitats off the coasts of Colombia, Bonaire and Curaçao in the southern Caribbean. With very few exceptions these sponges are small to tiny specimens inhabiting crevices and other cryptic habitats; some may be excavating. For comparison both published and unpublished material belonging to these genera from other parts of the world was examined, and this yielded several nomenclatorial changes and a further three new species from the Indian Ocean. The new species are: Zyzzya invemar (Caribbean), Cornulella santamartae (Caribbean), C. tyro (Seychelles), C. amirantensis (Seychelles), Damiria leonorae (Caribbean), D. toxifera (Seychelles) and Acheliderma lisannae (Caribbean). All species belonging to these genera, as well as to the closely related Indo-Pacific genus Paracornulum, are briefly diagnosed. The genera and species of this group are found to be distributed over tropical and subtropical waters of all three oceans. The five genera were so far of controversial systematic allocation, although their close relationship with Cornulum was generally accepted. The recently revived family Iophonidae is demonstrated to be the likely assemblage for them. A brief survey of Iophonidae genera is presented and a preliminary phylogenetic analysis of the fistular genera is attempted. Although several parts of the phylogenetic relationships remain unsolved, it is nevertheless clear that in all genera the closest relatives are not found in adjacent areas, but are often disjunct.

Paul M. Martens and Marco C. Curini-Galletti

Based on morphological and karyological investigations, the genus complex Archiloa sensu Karling (1966) is revised. The group contains seven genera, two of which are here described as new: Archiloa de Beauchamp, 1910, Archilopsis Meixner, 1938, Mesoda Marcus, 1949, Monocelopsis Ax, 1951, Archilina Ax, 1959, Inaloa gen. n., and Tajikina gen. n. The genus Pistrix Marcus, 1951 is synonymized with Mesoda Marcus, 1949. Eleven species are transferred to other genera. Seven new Archilina species are described from the Mediterranean: A. brachycirrus, A. deceptoria, A. etrusca, A. palestinica, A. selenifera, A. biselenifera, and A. caliban. Two distinct “morphs” are recognized within A. endostyla Ax, 1959. The genus Archilina now contains 12 species, 8 of which occur in the Mediterranean. The karyotypes of the eight Mediterranean species are known; all of them have the basic karyotype for the Monocelididae. Within the Mediterranean, some sister-group relationships among the Archilina species could be recognized. They are probably the result of independent evolutionary lines from ancestral Archilina species.

Pierre Nayrolles

According to our standard of the appendicular chaetotaxy, the following species are redescribed: Allacma fusca (Linné, 1758), Allacma gallica (Carl, 1899), Spatulosminthurus lesnei (Carl, 1899), and Spatulosminthurus betschi Nayrolles, 1990.

Damià Jaume and Lluc Garcí

Burrimysis palmeri, a new genus and species of Heteromysini, is described from the deep layers of an anchihaline cave lake on Cabrera (Balearic Islands). It shares with Mysidetes Holt & Tattersall and Deltamysis Bowman & Orsi a third thoracic limb endopodite without enlarged segments, and rudimentary pleopods in adults of both sexes. Nevertheless, Burrimysis differs, among other characters, in the armature and profile of telson and uropods. Its affinities and biogeographic significance remain uncertain.

Arthur G. Humes

Collocherides bleptus n. sp. is associated with a brittle star, Macrophiothrix sp., at Nosy Bé, in northwestern Madagascar. The new copepod differs from its two congeners by its larger size and by having leg 5 in the female with an elongate distal segment bearing only two setae.

Jan H. Stock

Six species of Copepoda Poecilostomatoida of the families Myicolidae, Sabelliphilidae, Lichomolgidae, and Mytilicolidae are recorded from six different species of intertidal bivalves in the East Scheldt (The Netherlands), a branch of the southern bight of the North Sea. One bivalve species may harbour more than one species of copepod, and one copepod species may use more than one species of bivalves as host.

S. van der Spoel, J. Bleeke and H. Kobayasi

The six already known infraspecific taxa in Cavolinia longirostris (De Blainville, 1821), presently in the genus Diacavolinia, are raised to species rank and sixteen species and two formae new to science are described in this genus from different oceanic areas. Some shell structures in the Cavoliniinae are described for the first time and the phylogeny of the group is discussed.

Giuseppe L. Pesce and Diana P. Galassi

Neocyclops (Protoneocyclops) geltrudeae n. sp. is described from the marine interstitial of Curaçao. Neocyclops (Neocyclops) medius Herbst, 1955 and N. (Neocyclops) vicinus Herbst, 1955 are for the first time recorded from the West Indies. New localities for Neocyclops (Protoneocyclops) stocki Pesce, 1985 from the West Indies are reported.

A.J. de Boer

The genus Guineapsaltria is erected for eight species, distributed in New Guinea and northeastern Queensland. Five species are transferred from the genus Baeturia Stål, 1866 and redescribed, viz. G. chinai (Blöte, 1960), G. flava (Goding & Froggatt, 1904), G. pallida (Blöte, 1960),G. stylata (Blöte, 1960), and G. viridula (Blöte, 1960), while three species are described as new to science (G. flaveola n. sp., G. pallidula n. sp., and G. pennyi n. sp.). G. flava is designated as the type species of the genus. Baeturia minuta Blöte, 1960 is synonymized with Guineapsaltria flava. The phylogeny of Guineapsaltria is discussed and some remarks are made on its phylogeneticrelationships with other New Guinean and Australian tibicinid genera. A key to the males and maps of distribution are presented.