Jean Just

Jean Just
University of Copenhagen · Zoological Museum, Department of Marine Invertebrates

Emeritus Assoc. Professor Ph.d., Dr.scient.

About

81
Publications
7,552
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
659
Citations
Introduction
Jean Just currently works at the Zoological Museum, Department of Marine Invertebrates, University of Copenhagen. Jean does research in Ecology, Systematics (Taxonomy) of Amphipoda and asellote Isopoda . His current project is 'systematics, distribution and biology of Siphonoecetini (Amphipoda).'

Publications

Publications (81)
Article
Full-text available
The classification of a group of Synopiidae is reviewed based primarily on new material from Australasia and the northern Pacific. A synopiid subfamily, Tironinae Stebbing, 1906 stat. nov. is diagnosed for the following six genera (3 new) consisting of 38 species (18 new): Tiron Lilljeborg, 1865, with 6 species, T. spiniferus Stimpson (type species...
Article
Full-text available
Type material is used to illustrate and redescribe the following species in the paramunnid Austrosignum–Munnogonium complex (classification sensu Just and Wilson 2007): Cryosignum incisum (Richardson, 1908), Cryosignum latifrons (Menzies, 1962) comb. nov., Meridiosignum kerguelensis (Vanhöffen, 1914), Munnogonium falklandicum (Nordenstam, 1933), Mu...
Article
Full-text available
Torben Lunn Wolff passed away 2. May 2017 at the age of 97 years. At his death the Zoological Museum and Danish zoology lost an exceptional personality, who by his professional range and astounding diligence through close to seven decades has left lasting tracks in science and scientific dissemination in deep-sea research, crustacean taxonomy, expe...
Article
Full-text available
Galeatylinae, a new subfamily in the Atylidae, for Galeatylus coripes new genus and species, is reported from the Bass Strait in the south-east of Australia. This is the first record of the Atylidae from Australia.
Article
Full-text available
The Western Australia fauna of Bubocorophiina (Siphonoecetini) from the Albany area in the south to Port Hedland in the north-west, a coastal stretch of about 2000 km, is reported. One new genus and 11 new species are described: Rhinoecetes sinuduopopulus sp. nov., R. rockinghamia sp. nov., R. makritrichoma sp. nov., R. lowryi sp. nov., R. caetus s...
Article
Full-text available
The first member of Cephaloecetes in the north-western part of the Indian Ocean, Cephaloecetes ungulatus sp. nov., is described from Chabahar Bay, the Gulf of Oman and Qeshm Island in the western Hormuz Strait, Iran. The new species is characterized from the other two species of genus Cephaloecetes by a unique claw-shaped ventral plate on antenna 2...
Article
Full-text available
The amphipod genus Sebadexius Ledoyer, 1984 (New Caledonia) is reviewed, based on new material from Cebu in The Philippines. Some characters are re-interpreted, and a new species, Sebadexius cebuense, is described.
Data
A Photo of the holotype of Palaeogammarus danicus
Article
Full-text available
With increased knowledge of the Amphipoda Siphonoecetini over the past 30 years, classification of this group of shallow water benthic amphipods is reappraised. The cerapodids and ericthonids are removed from the Siphonoecetini, and two new tribes, Cerapodini and Ericthonini, are diagnosed in the Ischyrocerinae. Three new subtribes, Siphonoecetina,...
Conference Paper
Full-text available
A novel look at the higher classification of Siphonoecetini Just, 1983 , presentation at the The 17th (ICA) , Trapani, 4-7 September 2017 (Abstract and Power Point pictures).
Article
Full-text available
The new species described below, Cephaloecetes schioettei, is the second siphonoecetine to be recorded from the archipelago region of Indonesia, The Philippines and Papua New Guinea. The previous reports were of Borneoecetes wongi Barnard & Thomas, 1984 from Borneo and from Papua New Guinea by Myers (1995).
Article
Full-text available
A new genus, Dendrogramma, with two new species of multicellular, non-bilaterian, mesogleal animals with some bilateral aspects, D. enigmatica and D. discoides, are described from the south-east Australian bathyal (400 and 1000 metres depth). A new family, Dendrogrammatidae, is established for Dendrogramma. These mushroom-shaped organisms cannot be...
Article
Full-text available
Metopa gigas sp. nov. is described from southern Greenland (east and west). This new species which reaches a length of around 20 mm is, together with M. mirifica Gurjanova, 1948 from the North Pacific, by far the largest member of the genus. The species is easily separated from sympatric Metopa clypeata (Kroyer, 1842; 15 mm; type species of Metopa)...
Article
Full-text available
Two new genera and eight new species of bubocorophiid Siphonoecetini are described from north-eastern and northern Australia: Belkginoecetes bullockyensis gen. et sp. nov. B. cooee sp. nov. (type species), B. darwiniense sp. nov., B. fleu-rae sp. nov., B. solea sp. nov., B. springthorpei sp. nov., Tropicoecetes carinata gen. et sp. nov., Rhinoecete...
Article
Full-text available
Article
Full-text available
Eighteen new species in Pentaceration Just, 2009 (Isopoda, Paramunnidae) are described. From the Arafura Sea: Penta-ceration bifida; from south eastern Australia: P. bovicornis, P. denticornis, P. globopleonis, P. lancifera, P. magna, P. meg-alomos, P. omalos, P. rihothalassa, P. serrata, P. simplex, P. tasmaniensis; from New Zealand: P. curvicorni...
Article
Full-text available
Article
Full-text available
Eight species in the Ischyroceridae are reported from Lizard Island, northern Great Barrier Reef, Australia. Five species are new to science: Coxischyrocerus rhombocoxus gen. et sp. nov., Tropischyrocerus pugilus gen. et sp. nov., Cerapus nudus sp. nov., Ericthonius parabrasiliensis sp. nov., and Ericthonius tropicalis sp. nov. Ericthonius pugnax D...
Article
Full-text available
The austropleustine Tepidopleustes acromatius sp. nov. (Pleustidae) is described from the outer Great Barrier Reef off Lizard Island. The species is similar to two tropical species from Madagascar Mauritius and Hawaii but differs in several characters from two species previously reported from Australia.
Article
Full-text available
A new genus, Pentaceration, in the janiroid asellote family Paramunnidae from the Bass Strait area in south-eastern Australia is diagnosed. The distinguishing characters of species in the new genus are 1 central and 2 lateral spines on the frontal margin of the head, elongate eyestalks, lateral spines of varying length on pereonites 2-7, and reduce...
Article
Full-text available
A new genus, Pentaceration, in the janiroid asellote family Paramunnidae from the Bass Strait area in south-eastern Australia is diagnosed. The distinguishing characters of species in the new genus are 1 central and 2 lateral spines on the frontal margin of the head, elongate eyestalks, lateral spines of varying length on pereonites 2–7, and reduce...
Article
Full-text available
The varying concepts of Janirellidae Menzies, 1956 are outlined, including its rejection by several authors. The view of Wilson and Wägele of Janirellidae being a valid family comprising Janirella Bonnier, 1896 and presumably Dactylostylis Richardson, 1911 (= Spinianirella Menzies, 1962) is accepted. Diagnoses of the Janirellidae subsequent to Menz...
Article
Full-text available
The varying concepts of Janirellidae Menzies, 1956 are outlined, including its rejection by several authors. The view of Wilson and Wägele of Janirellidae being a valid family comprising Janirella Bonnier, 1896 and presumably Dactylostylis Richardson, 1911 (= Spinianirella Menzies, 1962) is accepted. Diagnoses of the Janirellidae subsequent to Menz...
Article
Full-text available
Just, J. 2009. Compoceration garyi, a new genus and species of Paramunnidae (Crustacea, Isopoda, Asellota), from south- eastern Australia. Memoirs of Museum Victoria 66: 81-84. A new genus, Compoceration, in the asellote family Paramunnidae Vanhöffen, 1914 is diagnosed. The type species Compoceration garyi sp. nov. was collected from 220 m depth of...
Data
FIGURE 2. Triaina isodonte sp. nov. Holotype, male. ll, lower lip; md r, right mandible; mx 1 and mx 2, maxilla 1 and 2; mxp, maxilliped.
Data
FIGURE 3. Triaina isodonte sp. nov. Holotype, male, except F, female paratype. op, female operculum in situ, oblique view; pl 1 – pl 5, pleopods I – V; pt 1, ventral view of pleon with pleopods in place; pt 2, ventral view of pleon with pleopods removed, exposing anus.
Data
FIGURE 2. Pentaceration bassiana Holotype, male., mandible (, left; r, right); mx 1 – 2, maxilla 1 and 2; mxp, maxilliped.
Data
FIGURE 4. Pentaceration bassiana gen. et sp. nov. Holotype, male, except op, paratype, ovigerous female, and a – d, paratype females. op, operculum; pl 1 – 4, pleopods 1 – 4 (*, tip of pleopod 2 stylet); pt, pleotelson; vv, ventral view; a – d, lateral view of dorsal armature in 4 paratype females, a – c, ovigerous, d, preparatory.
Data
FIGURE 5. Pentaceration spinosissima gen. et sp. nov. Holotype, terminal male, except op, paratype, ovigerous female. a, antenna; au, antennula; cv, head ventral view; op, operculum; pl 1 – 4, pleopod 1 – 4; up, uropod. Scale bar for habitus: 0.5 mm.
Data
FIGURE 6. Pentaceration spinosissima gen. et sp. nov. Holotype, male, except F, paratype, ovigerous female. md, mandible (l, left; r, right); p 1, 2 and 6, pereopods 1, 2 and 6.
Data
FIGURE 3. Pentaceration bassiana gen. et sp. nov. Holotype, male, except F, paratype, ovigerous female, and M, paratype, terminal male. p 1, 2 and 6, pereopods 1, 2 and 6.
Article
Full-text available
Amphyllodomus incurvaria gen. et sp.n. is described and figured. The species lives among hydroids and algae and has a remarkable domiciliary biology in that it carries around a house built of two oval pieces of brown algae cut out by the animal itself. The species is placed in the Amphithoidae, but certain deviations from that family place it in an...
Article
Full-text available
The paramunnid genera Austrosignum Hodgson, 1910 (type species A. glaciale Hodgson, 1910) and Munnogonium George & Strömberg, 1968 (type species M. waldronense George & Strömberg, 1968) are re-diagnosed. Twenty seven species are reviewed. Austrosignum is restricted to two described species, Munnogonium to five described species. The remaining 20 sp...
Article
Full-text available
The paramunnid genera Austrosignum Hodgson, 1910 (type species A. glaciale Hodgson, 1910) and Munnogonium George & Strömberg, 1968 (type species M. waldronense George & Strömberg, 1968) are re-diagnosed. Twenty seven species are reviewed. Austrosignum is restricted to two described species, Munnogonium to five described species. The remaining 20 sp...
Article
Full-text available
Paramunnid species of Southern Hemisphere cold-water Austronanus Hodgson, 1910 and related genera are characterised by simple, smooth, flattened, rather elongate oval bodies, a broadly projecting frontal head margin, well-developed, short, mostly distally bulging eyestalks with ommatidia, pereonites with lateral margins contiguous, rounded or trunc...
Article
Full-text available
Paramunnid species of Southern Hemisphere cold-water Austronanus Hodgson, 1910 and related genera are characterised by simple, smooth, flattened, rather elongate oval bodies, a broadly projecting frontal head margin, well-developed, short, mostly distally bulging eyestalks with ommatidia, pereonites with lateral margins contiguous, rounded or trunc...
Article
Full-text available
A new genus and species of janiroidean Asellota, Xenosella coxospinosa, is described from the mid-bathyal slope off the coast of south-eastern Australia. Following a comparison of the new species to several families of broadly similar body shape, with emphasis on monotypic Pleurocopidae, a new family, Xenosellidae, is proposed for the new species....
Article
Full-text available
This paper presents a global review of the current unwieldy concept of the genus Paramunna Sars, 1866. The study is based mainly on large new collections of material from Australia and subantarctic islands south of Tasmania and New Zealand. Of the four genera previously synonymised with Paramunna, Austrimunna Richardson, 1906 is revived (type speci...
Article
Full-text available
A new genus and a new species, Haplodendron buzwilsoni, from the southeastern Australian mid bathyal are described. This is the first record of the family in the Southern Hemisphere Indo-Pacific. Diagnostic characters of the new genus are compared with those of other genera in the family. The possible significance of the joint possession, between t...
Article
Full-text available
Article
Full-text available
Just, Jean (2003): Haplodendron buzwilsoni gen. nov., sp. nov., the first record of Haplomunnidae from the southern Indo­Pacific (Isopoda: Asellota). Zootaxa 372: 1-10, DOI: 10.5281/zenodo.156634
Article
Full-text available
Pseudopleonexes sheardi n.sp. is reported from South Australia. This is the second named species in the genus known previously only from New Zealand. Conlan's (1982) original diagnosis of the genus (type species Pleonexes lessoniae Hurley, 1954) and the diagnosis in Barnard & Karaman (1991) differ in several respects. Thirty-six characters from tho...
Article
Full-text available
Two new species, Mexicope westralia and Ianthopsis vanhoeffeni, are described from south-western and south-eastern Australia respectively. One species of Mexicope was known previously from the Gulf of Mexico and the Caribbean. New morphological evidence shows that Mexicope, hitherto considered as family incertae sedis, should be transferred to the...
Article
Full-text available
Just, J., 2001. Bathyal Joeropsididae (Isopoda: Asellota) from south-eastern Australia, with description of two new genera. Memoirs of Museum Victoria 58(2): 297-333. Fifty-three species of Joeropsis, listed here, have been previously described in this, until now, the only genus of the family. Characters in the Joeropsididae are tabulated and discu...
Article
Full-text available
Exampithoe (Melanesius) compressa n.sp. and E. (M.) halei n.sp. are described from shallow water in southern Australia. The distinctive compressed body shape sets the former species apart from other Exampithoe. Exampithoe (M.) halei is of similar body shape as the two previously known species in Melanesius, viz. E. (M.) cooki and E. (M.) kutti, but...
Article
Full-text available
It is estimated that Australia is home to more than 1 million species, less than 15% of which have been described. No estimate is given for parasites, but brief speculation on the potential is presented. The Commonwealth Government has a clear role in funding biosystematic research in Australia in support of its Natural Heritage Trust programmes, t...
Article
Full-text available
Acanthonotozomopsis Watling & Holman, 1980 and Vicmusia Just, 1990 are synonymised under the older name. Two species are recognised, A. pushkini (Bushueva, 1978) and A. duplocoxa (Just, 1990). The placing of Acanthonotozomopsis in the Acanthonotozomellidae or Iphimediidae sensu lato is rejected. The family name Vicmusiidae is retained in accordance...
Article
Full-text available
The continental slope of southeastern Australia is a complex hydrological region where sediments is biogenic and largely derived from the nearby shelf. The isopod fauna of the slope between 200 and 3150 m depth has been investigated on four transects (32°S–42°S). Forty-six non-quantitative epibenthic sled, beam-trawl, corer and trawl samples captur...
Article
Full-text available
Vermectias nelladanae, new species, is described from subantarctic Macquarie Island. It differs in minor details from its only congener, V. caudiculata Sivertsen and Holthuis, 1980, from Tristan da Cunha. Vermectias is the only asellote with 3 free pleonites in front of the pleotelson. Other characters considered primitive within the Asellota are:...
Article
Full-text available
ABSTRACT Pseudojanira investigatoris, new species, differs from P. stenetrioides, the only other species in the Pseudojaniroidea, in proportions and setation of the body, mouthparts, pereiopods, and pleopods. The interaction of the penes and male pleopods I and 2 in sperm transfer is deduced. The spermatheca opens through a short cuticular organ in...
Article
Full-text available
Vicmusia duplocoxa, gen, et sp. nov., from a depth of 400 m in the Bass Strait Canyon off south-eastern Australia is described. The species possesses three unique apomorphisms: pereonal and pleonal tergites are divided laterally (one dorsal and two lateral subplates to each tergite); coxal plate 2 is strongly reduced among long plates 1, 3 and 4; m...
Article
Full-text available
A new species very similar to Hirsutia bathyalis Sanders et al. (1985), the only other member of the Hirsutiidae, is described from 1,500 m off southeastern Australia. The single specimen has oostegite-like appendages with long, plumose marginal setae. Their posterior position is compared with a similar position in siphonoecetine amphipods. Pereiop...
Article
Full-text available
Tiron bellairsi sp. n. is described and illustrated. The species, of less than 3 mm in length, was quite common on shallow-water coral sand with a fine layer of detritus. It has a hitherto undescribed behaviour in that the animals move around on top of the sand carrying, with pereopods 3–7, two flat slabs of coral or shell debris for protection. Th...
Article
Full-text available
The material includes 105 species. Aceroides goesi, Bathymedon antennarius, Monoculodes vibei and Parametopa crassicornis are new to science. An additional six species are new to Greenland, while nine species have previously been found in E Greenland but not in W Greenland. Four genera (Lembos, Arrhinopsis, Arctopleustes, Parametopa) are recorded f...
Article
Full-text available
Article
Full-text available
Based on the late Dr. Nils Knaben’s notes, including a key to species, the present paper presents a revision of the pycnogonid genus Boreonymphon G. O. Sars, 1888. Four species are recognised, viz. the original B. robustum (Bell, 1855), B. abyssorum (Norman, 1873) which is re-established as a valid species, B. ossiansarsi Knaben sp. nov., and B. co...

Network

Cited By

Projects

Project (1)
Project
Description of new species and genera, redescriptions, and higher classification of the Group.