摘要:

During examination of a large sample ofPhyllodistomum umblaefrom Arctic char,Salvelinus alpinus, in Lake Tokke (Drangedal, type locality) and Lake Katnosa (Nordmarka, vicinity of Oslo), Norway, several abnormalities were found in the adult specimens. The paper describes the abnormal cases recovered and gives a systematized review of abnormal digeneans reported in the literature. Different terms used in digenean teratology and morphology are also discussed and defined. Abnormal cases occur inP. umblaewith regard to the dimensions of specific structures (caeca, ovary, oötype, seminal vesicle, testes, uterus, vitellarium) and in the numbers of ovaries and testes. Polymorphism in testes position was observed and obstructions of the reproductive organs were evident. The size variability of the seminal vesicle and ovary and variable appearance of the vitelline bodies are demonstrated

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1988.tb00089.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

Oerstedia striatasp.n. (family Prosorhochmidae?) is described. The species was originally reported as one of the varieties of the polymorphic speciesOerstedia dorsalis(Abildgaard, 1806). Its specific status was detected by an electrophoretic screening of six enzymes, of which four were unique for this species as compared to the analysed forms ofO. dorsalis.

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1988.tb00090.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

Descriptions of species ofPhyllodoceSavigny, 1818 from Northern Europe [P. laminosaSavigny, 1818,P. citrnaMalmgren, 1865,P. groenlandicaÖrsted, 1843,P. lineata(Claparède, 1870),P. longipesKinberg, 1866,P. maculata(Linnaeus, 1767),P. mucosaÖrsted, 1843 andP. rosea(Melntosh, 1877)comb.n.] are given. A key to the species is included. The examined material consists of newly collected material as well as collections in museums. Available type material has been checked. A number of junior synonyms are proposed.AnaitidesCzerniavsky, 1882 andAponaitidesMeCammon&Montagne, 1979 are considered not val

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1988.tb00091.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

Taxonomic descriptions of three new species of Pseudococculinidae, which are treated anatomically in a concurrent paper by Haszprunar, are given:Amphiplica venezuelensisfrom the Venezuelan Basin,A. knudsenifrom the Tasman Basin andYaquinabyssia careyifrom the Cascadia Abyssal Plain off Oregon.

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1988.tb00092.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

The anatomy of 12 pseudococculinid species, representing the two subfamilies and 10 (of 11 known) genera, is described in detail. Three new genera are erected,Yaquinabyssia, CopulabyssiaandAmphiplica. Subfamilial and generic systematics are reconsidered and additionally based on anatomical characters. Characters defining subfamilies and genera (Pseudoeoeculininae:Pseudococculina, Notocrater, Tentaoculus, Mcsopelex, Bandabyssia, Kurilabyssia;Caymanabyssiinae:Caymanabyssia, Colotrachelus, Yuquinabyssia, Copulabyssia, Amphiplica) are the modifications in shell and radula, the number and arrangement of gill‐leaflets, the size of the pedal gland, the degree of eye‐reduction and the modifications of the seminal groove and of the copulatory organ. Separation of the Pseudococculinidae Hiekman, 1983 from the Cocculinidae Dall, 1882 at the superfamilial level is confirmed by great differences in their anatomy. Whereas the Cocculinidae are closely related to the Bathysciadiidae (Cocculinoidea). the Lepctcllidae, Pyropeltidae, Pseudococculinidae,? Bathyphytophilidae, Osteopeltidae, Cocculinellidae, Addisoniidae and Choristellidae form a clearly separated supcrfamily (Lepetelloidea). Both superfamilies compose the Cocculiniformia. a primitive but highly specialized arehaeogastropod subor

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1988.tb00093.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

From an examination of the original material of G. O. Sars and new material from Björnehodebukta, Oslofjord,Psammis longisetosaSars is redescribed, noting in particular the presence of 2 inner setae on P2 endopod 2 and 1 inner seta on P4 exopod 1. A new species is described from the Celtic Sea,Paradanielssenia biclavata, characterized by the presence of club‐shaped appendages on the mouthparts and differing fromP. kunziSoyer in mouthpart structure and limb setation. Specimens from the Gulf of Mexico have been assigned to a new subspecies,Thompsonula hyaenae elongata, after careful comparison with specimens of the nominateT. hyaenae(I. C. Thompson) from Europe and South Caroli

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1988.tb00094.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

New localities of several arcturids are reported from the Atlantic sector of the Antarctic Ocean.Antarcturus hempelisp.n. is described and drawings from type material of the following species are presented:Antarcturus furcatus(Studer, 1882),A. polaris(Hodgson, 1902),A. glacialis(Beddard, 1886).A granulosusNordenstam, 1933,A. antarcticusBouvier, 1910,A. lilleiTattersall, 1920,A. coppingeri(Miers, 1881),A. hodgsoniRichardson, 1913. Of the 37 species known from the studied area only 6 occur in the high Antarctic Weddell Sea. It is suspected that the semi‐sessile way of life yielded the evolution of many local species and race

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1988.tb00095.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

A new genus of crangonid shrimp from the Arafura Sea is described and illustrated.Pontocheras amfuraesp.n. occurs in shallow silty waters off northern Australia. The new genus is closely related to the genusPontocarisBate, 1888, hut it is remarkable in the modifications of the dactyls of the fifth pereiopods, a mechanism attaching the branchiostogite to the thoracic sternites and the presence of a probable stridulating mechanism on the carpus of the third pereiopod.

ISSN:0300-3256    

DOI:10.1111/j.1463-6409.1988.tb00096.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY