摘要:

The following species of Cylindrostomidae are redescribed:Cylindrostoma lutheriWestblad, 1955,C. micropharynxWestblad, 1952,Monoophorum tubiferumWestblad, 1955,M. stiliferumWestblad, 1955 (transferred toEinarhelminsgen. n.),Allostoma crassicystiferurn(Westblad, 1952),A. uterinum(Westblad, 1955), andEuxinia balticaMeixner, 1938. Three new species are described:Cylindrostoma paralutheri, Allostoma neostiliferumandA. hopkinsi.A review is given on anatomy and evolutionary trends in Cylindrostomidae.

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1993.tb00362.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

A description of the second species of the enigmatic deep‐sea nematode genusRhaptothyreus, and results of the re‐examination of type material ofR. typicusHope&Murphy, 1969 are presented.Rhaptothyreus minorsp. n. from the northeast Atlantic is characterized by the small body length (3.15 versus 6.99‐12.80 mm) and the presence of large turgescent cells filling the body cavity. Interstitial spaces between these cells contain masses of bacteria‐like str

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1993.tb00363.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Males of two new species ofCylindropsyllusBrady, 1880 (Cylindropsyllidae) are described.Cylindropsyllus ibericussp. n. is based on a single specimen from Portugal previously misidentified asC. laevisBrady, 1880; C.govaereisp. n. is reported from Corsican shell‐gravel. The boreomediterranean distribution of C.laevisis confirmed and a key to the species ofCylindropsyllusis presented. Redescriptions are provided for the two species ofCylinula Coull, 1971, the type species C.proximaCoull, 1971 andC. arganoiCottarelli and Venanzetti, 1989. The relationships ofCylindropsyllus, CylinulaandEvansulaSars, 1909 are briefly discusse

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1993.tb00364.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Akentrogonid rhizocephalans morphologically resembling the genusThompsoniaare revised as a result of examination of new material. The species concerned are all obligatorily colonial and have ovoid or cylindrically shaped externae with a terminal stalk and a much reduced anatomy. A numerical cladistic analysis of all Rhizocephala Akentrogonida using the Hennig 86 program leads to a redefinition of the Thompsoniidae HOeg and Rybakov, 1992. Autapomorphies for the Thompsoniidae are primarily the morphology of the attachment to the host and the total absence of a mesentery. The cladistic analysis refutes that the Thompsoniidae should have a plesiomorphic morphology and branch off very low on the rhizocephalan phylogeny. The family now comprises four genera:Pottsiagen. n. (monotypic),Diplothylacusgen. n. with two species,ThompsoniaKossmann with five species. A revived and redefinedThylacoplethusCoutière includes eight species. The genera are distinguished by the location of the spermatogenic tissue, the site where the eggs are fertilized, the presence or absence of a mantle pore and the way it is formed, the number or absence of oviducts, and the number of cuticular annuli on the stalk. All 16 species, of which six are new to science, are described when necessary, and, if possible, illustrated. A phylogeny for the redefined family is proposed.Thylacoplethusis morphologically closest to the hypothetically ancestral thompsoniid and is likely paraphyletic. The new genusPolysaccuswith two species, one of them new to science, and the monotypic genusPirusaccusLützen resemble thompsoniids in externa morphology and in being obligatorily colonia

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1993.tb00365.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

Ianiropsis varianssp. n. is described, and it is shown that dorsal pigment patterns of this species vary widely within a single population. The janirid speciesAustrofilius furcatusHodgson, 1910,A. serratusVanhöffen, 1914,Neojaera antarctica(Pfeffer, 1887).Notasellus chilensis(Menzies, 1962), andN. sarsiiPfeffer, 1887 are redescribed. Additionally, sexual dimorphisms of maxilliped, pereopods, and pleopod 3 observed in some janirid species are discussed

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1993.tb00366.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY