Marine nematodes from Guadeloupe: IX. The genus <i>Metepsilonema</i> (Epsilonematidae)

Three new species of the genus Metepsilonema Steiner are described from the Guadeloupe littoral marine interstitial habitats. M. magdae sp. n. is significantly characterised by the pearl-like ornamentation of the distal edge of the posterior annules and by the shape and sexual dimorphism of the amphids. M. clasingae sp. n. displays a noteworthy cuticular ornamentation with long posterior subdorsal spines, far more pronounced in juveniles. In M. glutinosum sp. n. the ambulatory setae are glued together, even in juveniles. M. bermudae Lorenzen described from Bermuda and reported from Galápagos, has been collected rather frequently in Lesser Antillae

Desmodoridae from the Bay of Morlaix (Brittany) and the Southern Bight of the North Sea

Three new Desmodoridae species are described from the Bay of Morlaix (Brittany), Perspiria megamphida sp.n. and Desmodora granulata sp.n. The type species of Spirinia, S. parasitifera (Bastian, 1865) is redescribed: additional morphological information is given on the head structure and the copulatory apparatus. The two subgenera of Spirinia : S. (Spirinia) Gerlach, 1963 and S. (Perspiria) Wieser & Hopper, 1967, are raised to genus level

Marine nematodes from Guadeloupe and other Caribbean Islands: VII. The genus <i>Epsilonema</i> (Epsilonematidae)

Five new species of the genus Epsilonema (E. crytamphis sp. n., E. margaritatum sp. n., E. meunierorum sp. n., E. oodamphis sp. n. and E. paralasium sp. n.) are described from the coralline littoral deposits of Guadeloupe, its satellite island and other Caribbean islands. Additional information is given for E. lasium, and E. mangrovense is redescribed

New data on the taxonomic status of <i>Metepsilonema hagmeieri</i> and <i>M. emersum</i> with description of <i>M. lorenzeni</i> sp. nov. (Nemata, Epsilonematidae)

Redescription of M. hagmeieri, type-species of the genus Metepsilonema, based on the study of populations from the North Sea and the Channel. M. emersum is considered a synonym of the type-species M. hagmeieri. M. lorenzeni sp. nov. is described from the Mediterranean Sea; it is mainly characterized by a large number of non-overlapping annuli with a thick cuticle and wide inner lumen and long spicules. M. hagmeieri sensu Lorenzen 1973 is attributed to the new species M. lorenzeni

Deux espèces nouvelles d'Ironidae marins; observations sur les spermatozoïdes flagellés des Nématodes

Description of a new species of Syringolaimus, S. renaudae n. sp., from the Cape Basin, south western Atlantic deep-sea ooze from 3 694 to 4 180 m depth. S. renaudae n. sp. is characterized by its rather large size, its cephalic collar, three bifid and asymétrie teeth, extension of pharyngeal bulb and spicule morphology. Noteworthy are the very peculiar spindleshaped and flagelliform spermatozoa, that are similar to those found in S. loofi n. sp. described from the coast of the Netherlands

Nématodes marins de Guadeloupe: V. <i>Lauratonema spiculifer</i> Gerlach,1959; description du système reproducteur des Lauratonematidae

Lauratonema spiculifer Gerlach, 1959, is redescribed. Females are devoid of vulva and possess a characteristic intra-uterine sphincter. The two genera of the Lauratonematidae are discussedwith peculiar references to the female genital system structures of L. spiculifer and Lauratonemoides originalis (Gerlach, 1956)

Nématodes abyssaux (campagne Walda du N/O <i>Jean Charcot</i>): VI. Le genre <i>Acantholaimus</i>: espèces nouvelles et étude de l'appareil reproducteur à spermatozoïdes géants

Three new species of the genus Acantholaimus are described from deep-sea South- East Atlantic oozes (Walvis ridge, depth from 2 063 to 4 308 m) : A. microdontus n. sp., A. macramphis n. sp., and A. longistriatus n. sp. Within the genus, the reproductive apparatus displays a noticeable uniformity coupled with a very unusual male reproductive system producing a small number of giant spermatozoa, of which only two were found in each inseminated female. Four additional species studied from the same sites display the same reproductive pattern : A. quintus, A. septimus, A. maks and A. iubilus ( G E R L A C H et al., 1979). The same phenomenon has also been found in a littoral species (at most four spermatozoa in the inseminated female)