Tricominae (Nematoda - Desmoscolecida) from the northern part of Moçambique Channel, with five new species and one new genus

Five new species of Tricominae (Desmoscolecida) from the N.E. of the Moçambique Channel are described: Antarcticonema inaequalis, Tricoma curvespiculata, T. bullapophysa, T. gloriosa and Desmotricoma spinicauda. Desmotricoma gen.n. is mainly characterized by the ornamentation of the body-cuticle i.e. provided with prominent protruding concretion masses around long spines and dispersed over the whole body in a more or less regular way

Guitartia tridentata n. gen., n. sp (monhysterida: xyalidae) and macrodontium gaspari n. gen., n. sp (chromadorida: microlaimidae), free-living marine nematodes from the Caribbean sea

Two new genera of free-living marine nematodes are described from the muddy bottom of Cienfuegos Bay, Caribbean Sea. Guitartia n. gen. (Xyalidae, Monhysterida) is characterised by three long tooth-like structures in the stegostom, second and third circle of anterior sensilla separate and posterior genital branch of the female restricted to a long post-vulvar sac. The type species is Guitartia tridentata n. gen., n. sp. Within the Xyalidae, Guitartia n. gen. is morphologically close to Amphimonhystrella, Cobbia, Elzalia, Scaptrella and Valvaelaimus, all being characterised by sclerotised structures in the stoma and transverse striation of the body cuticle. Main features for discrimination are the type of stoma structure, the shape and relative size of amphidial fovea, the presence of a post-vulvar sac and gubernacular apophyses and the absence of terminal setae on the tail. Macrodontium n. gen. (Microlaimidae, Chromadorida) is characterised by a heavily sclerotised stoma with one large dorsal tooth and two smaller subventral teeth, sexual dimorphism in size and position of the amphidial fovea and males with a single anterior testis. The type species is Macrodontium gaspari n. gen., n. sp. Within the Microlaimidae, Macrodontium n. gen. is similar to the genera Acanthomicrolaimus and Bolbolaimus due to sclerotised stoma and presence of large dorsal tooth. The new genus is similar to Aponema in sexual dimorphism in the size of the amphidial fovea, monorchic males, presence of a gubernacular apophysis and conico-cylindrical tail shape. Morphological characters of diagnostic value within the family are the ornamentation of the body cuticle, relative length of cephalic sensilla, stoma sclerotisation and number of testes

Three new draconematid species from Papua New Guinea

Three new draconematid species: Prochaetosoma martensi sp. n., Paradraconema maggentii sp. n. and Tenuidraconema fiersi gen. n., sp. n. are described. The new genus Tenuidraconema belongs to the subfamily Prochaetosomatinae but shows also affinities with the Draconematinae, the other subfarnily of the Draconematidae. Some reflections are made on the phylogeny of the Draconematidae

Scientific report on the Belgian Expedition to the Great Barrier Reef in 1967. Nematodes XIV. <i>Prototricoma dherdei</i> sp. nov. and <i>Desmolorenzenia cooleni</i> sp. nov. with a discussion of the genus <i>Prototricoma</i> Timm (Nematoda, Desmoscolecida)

Two new species are described: Desmolorenzenia cooleni sp. nov. characterized by the very small body length and by the head shape, with the extreme anterior border provided with six fine labial setaePrototricoma dherdei sp. nov. characterized by its habit, the head shape, anteriorly tapered to a narrow truncated end and by the shape of the spicules in males. The genusPrototricoma is discussed. A redescription is given of the type species Prototricoma longicauda

Morphometric variability and value of characters used for specific identification in <i>Trichodorus</i> COBB, 1913

The intraspecific variability and taxonomic value of the 39 characters used in the species diagnoses of Trichodorus, were studied, Only fourteen of them are retained as useful for identification purposes and will serve as base for the genus database for the NEMAID identification computer program

On the deep-sea desmoscolecid fauna of the flat of Cap Vert (Nematoda: Desmoscolecida)

The deep-sea bottom samples from the flat of Cap Vert, tropical Atlantic Ocean, collected during the EUMELI cruises, contain eight demoscolecid species, six of them belong to the subgenus Quadricoma. The dominant species Tricoma (Quadricoma) maxima is rediscribed including SEM information on the head region. A new species Tricoma (Quadricoma) magnafenestra sp. nov. is characterised by a relative long body with 44 main rings, an end ring with large pores or phasmata and spike-like spinneret, a broad head with truncated anterior end with labial rim, males with 55µm long spicules. Additional information is given on T. (Q.) loricata. The taxonomic status of T. (Q.) media is discussed; the species is considered as a species inquirenda

Five new species of deep-sea desmoscolecids (Nematoda - Desmoscolecida) from the Bay of Biscay

The present paper deals with a study of desmoscolecids found in deep-sea samples from the Bay of Gascony. Five new species are described: Desmoscolex multiannulatus, D. paralongistosus, D. segonzaci, D. macrophasmatus and Quadricoma gascognensis. Desmolorenzenia longicauda (Timm, 1970) Freudenhammer, 1975 is synonymous with D. eurycricus (Filipjev, 1922) Freudenhammer, 1975 and Quadricoma iberica Freudenhammer, 1975 is synonymous with Q. brevichaeta Freudenhammer, 1975

Draconematidae and Epsilonematidae (Nematoda) from Laing Island Papua New Guinea, with one new Genus and three new species

Two new Epsilonema-species are described: E. parvospina sp.nov., characterized by the ornamentation of the body cuticle and the single ventral row of 3 to 5 copulatory thorns in male and E. longispicula sp.nov., characterized by the ornamentation of the cuticular body rings, long spicus and two single ventral rows of copulatory thorns in male. A new genus Triepsilonema with a new species T. tripapillata gen. n., sp.n. is described. Triepsilonema is mainly characterized by the six rows of ambulatory setae and the separate outlet for each of the three caudal glands. New information is given on Apenodraconema spinicaudum (Gerlach, 1958) Allen & Noffsinger, 1978 and Paradraconema floridense Allen & Noffsinger, 1978

Scientific report on the Belgian Expedition to the Great Barrier Reef in 1967. Nematodes I: <i>Desmoscolex</i>-species (Nematoda-Desmoscolecida) from Yonge Reef, Lizard Island and Nymphe Island with general characteristics of the genus <i>Desmoscolex</i>

Hundred and thirteen specimens of Desmoscolex, belonging to fourteen species, were found in samples from Yonge Reef, Nymphe Island and Lizard Island (Great Barrier Reef, Australia). Among them D . granulatus n . sp., D . laevis Kreis, 1926 and D . minutus Claparede, 1863 are described. A new name, D. paralaevis n. sp. is proposed for the specimens described as D . laevis by Lorenzen (1971) . The diagnosis of the genus is emended by considering the internal structures such as the oesophagus and oesophago-intestinal junction