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Joeropsis panstikta sp. n. A–C, F male paratype (3.1 mm) D, F, G female (3.0 mm) paratype; both MTQ W31277. A–E pleopods 1–5 respectively F pleopod 2 apex G female pleopod 2.
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The marine isopod family Joeropsididae (Asellota) is documented for the Lizard Island region of the Great Barrier Reef, Australia. Fifteen species of Joeropsis are recorded, including ten new species; descriptive notes are provided for five species that lacked adequate material for description. A revised family and genus diagnosis is presented toge...
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Sphaeromatid isopods, such as Dynamene, are common and abundant members of the invertebrate fauna of littoral and shallow sublittoral substrates. Six species of Dynamene occur in the northern hemisphere. Only two species exist outside this range, in Australia. The distribution of the various species in the NE Atlantic-Black Sea axis has been contro...
Citations
... The genus Joeropsis Koehler, 1885 including 77 species is the largest genus in the family Joeropsididae Nordenstam, 1933(Boyko et al. 2008. Joeropsis can be distinguished from other joeropsidid genera by having a laterally parallel body shape, a dorsally smooth or finely granular body surface, and a not medially expanded maxillipedal palp article 3 (Just 2001;Bruce 2015). Although, occasionally, the colour pattern fades of a body for old preserved specimens or shows intraspecific variations in some species, the pattern of the body has been recognized as an apparent character in Joeropsis taxonomy to distinguish species (Menzies 1951;Bruce 2015). ...
... Joeropsis can be distinguished from other joeropsidid genera by having a laterally parallel body shape, a dorsally smooth or finely granular body surface, and a not medially expanded maxillipedal palp article 3 (Just 2001;Bruce 2015). Although, occasionally, the colour pattern fades of a body for old preserved specimens or shows intraspecific variations in some species, the pattern of the body has been recognized as an apparent character in Joeropsis taxonomy to distinguish species (Menzies 1951;Bruce 2015). Additionally, Bruce (2015) has recently mentioned that shapes of the cephalon, pseudorostrum, maxilliped, pleotelson, male pleopod 1, and uropods can be useful diagnostic characters in this genus. ...
... Although, occasionally, the colour pattern fades of a body for old preserved specimens or shows intraspecific variations in some species, the pattern of the body has been recognized as an apparent character in Joeropsis taxonomy to distinguish species (Menzies 1951;Bruce 2015). Additionally, Bruce (2015) has recently mentioned that shapes of the cephalon, pseudorostrum, maxilliped, pleotelson, male pleopod 1, and uropods can be useful diagnostic characters in this genus. ...
Two new species, Joeropsis denticulatus sp. nov. and Joeropsis semicircularis sp. nov. are reported from South Korea. Joeropsis denticulatus sp. nov. can be identified by the following character states: whole body has dark brown chromatophores dorsally, lateral margins of the cephalon are smooth and narrowing anteriorly, and basis of pereopods has serrated cuticular scales superiorly. Joeropsis semicircularis sp. nov. can be identified by the following character states: the cephalon, pereonite 4, and pleotelson have dark brown chromatophores dorsally, lateral margins of the cephalon are smooth and parallel each other, and flagellar article 1 of the antenna is swollen and semi-circular in shape.
... The genus Joeropsis Koehler, 1885 including 77 species is the largest genus in the family Joeropsididae Nordenstam, 1933(Boyko et al. 2008. Joeropsis can be distinguished from other joeropsidid genera by having a laterally parallel body shape, a dorsally smooth or finely granular body surface, and a not medially expanded maxillipedal palp article 3 (Just 2001;Bruce 2015). Although, occasionally, the colour pattern fades of a body for old preserved specimens or shows intraspecific variations in some species, the pattern of the body has been recognized as an apparent character in Joeropsis taxonomy to distinguish species (Menzies 1951;Bruce 2015). ...
... Joeropsis can be distinguished from other joeropsidid genera by having a laterally parallel body shape, a dorsally smooth or finely granular body surface, and a not medially expanded maxillipedal palp article 3 (Just 2001;Bruce 2015). Although, occasionally, the colour pattern fades of a body for old preserved specimens or shows intraspecific variations in some species, the pattern of the body has been recognized as an apparent character in Joeropsis taxonomy to distinguish species (Menzies 1951;Bruce 2015). Additionally, Bruce (2015) has recently mentioned that shapes of the cephalon, pseudorostrum, maxilliped, pleotelson, male pleopod 1, and uropods can be useful diagnostic characters in this genus. ...
... Although, occasionally, the colour pattern fades of a body for old preserved specimens or shows intraspecific variations in some species, the pattern of the body has been recognized as an apparent character in Joeropsis taxonomy to distinguish species (Menzies 1951;Bruce 2015). Additionally, Bruce (2015) has recently mentioned that shapes of the cephalon, pseudorostrum, maxilliped, pleotelson, male pleopod 1, and uropods can be useful diagnostic characters in this genus. ...
Two new species, Joeropsis denticulatus sp. nov. and Joeropsis semicircularis sp. nov. are reported from South Korea. Joeropsis denticulatus sp. nov. differs from its congeners by the following features: (1) whole body has chromatophores dorsally, although those in pereonite V occasionally are faint or lacking according to individuals; (2) lateral margins of the cephalon are smooth and narrowing anteriorly; (3) the distal end of the pseudorostrum is round; (4) maxillipedal palp article II has a mesial lobe bifid distally; and (5) basis of pereopods have serrated cuticular scales superiorly. Joeropsis semicircularis sp. nov. can be distinguishable from other Joeropsis species by the following characteristics: (1) the cephalon, pereonite IV, and pleotelson have dark brown chromatophores dorsally; (2) lateral margins of the cephalon are smooth and parallel each other; (3) the distal end of the pseudorostrum is round and slightly serrate; (4) flagellar article I of the antenna is swollen and semicircular-shaped; and (5) the pleotelson and uropods are serrated on lateral margins.
... The specimens were either preserved in 5% formalin (samples from 1978-1980 and 1997) or 80% ethanol (samples from 2009). Detailed description of the methods has been given by Bruce (2015), Bruce & Buxton (2013) and Svavarsson & Bruce (2012). The original preservation of the older museum material is not necessarily known, but probably transferred to ethanol after fixing in formalin. ...
Eleven species including six new species of Gnathiidae (Crustacea, Isopoda, Cymothoida) are reported from the Heron Island and Wistari Reef, Capricorn Group, southern Great Barrier Reef: Elaphognathia queenslandica sp. nov., Gnathia acrorudus sp. nov., Gnathia capricornica sp. nov., Gnathia carinodenta sp. nov., Gnathia formosa sp. nov. and Gnathia glaucostega sp. nov. Gnathia cornuta Holdich & Harrison, 1980 and Gnathia grutterae Ferreira, Smit & Davies, 2010 are for the first time reported from Heron Island and new records from Heron Island are provided for Gnathia biorbis Holdich & Harrison, 1980, Gnathia variobranchia Holdich & Harrison, 1980, and Gnathia wistari Svavarsson & Bruce, 2012.
... The known species, all but two recently described (e.g. Bruce 2015;Bruce and Buxton 2013;Bruce and Cumming 2015;Song et al. 2018), belong principally to 'large-sized' families of shallow-water Asellota (Joeropsididae Nordenstam, 1933;Stenetriidae Hansen, 1905), approximately in the range of 2.5-7.0 mm body length. Use of fine mesh nets and specifically sampling reef sands [see Bruce and Buxton (2013) for detail of collecting methods] has resulted in the discovery of species of small and interstitial isopods that have until now been overlooked. ...
The asellote family Gnathostenetroididae Kussakin, 1967 is reported for the first time from Australian waters. Four new species of Gnathostenetroides Amar, 1957 from the Great Barrier Reef are described. The genus Maresiella Fresi and Scipione, 1980 is here placed into synonymy with Gnathostenetroides and a new diagnosis is given for Gnathostenetroides together with a key to the 12 species and a map of the distribution of the genus. The genus Dignatroides Stock and Vonk, 1990 is placed into synonymy with Caecostenetroides Fresi and Schiecke, 1968, and a new composition of the family Gnathostenetroididae, the updated diagnosis and a key to the three genera are provided.
... Serov and Wilson (1995) provided the only comprehensive generic review and reappraisal of this family. More recently the genera Machatrium Bruce &Buxton, 2013 andOnychatrium Bruce &Cumming, 2015 were described, including new species from the Great Barrier Reef, Australia. Marine stenetriids are diverse, abundant and omni-present on coral reefs (Kensley 1984a;1988;Müller 1990;1991a, b;Kensley and Schotte 2002;Martin et al. 2003), but still remains relatively poorly documented in tropical Australia (see Bruce and Cumming 2015). ...
... Sampling. See Bruce (2015) and Bruce and Buxton (2013) for details of sampling methods and locations. ...
The genera Tenupedunculus Schultz, 1982 and Stenobermuda Schultz, 1979 are recorded for the first time from beyond the Southern Ocean, at the Great Barrier Reef, Australia. Tenupedunculus serrulatus sp. n. and Stenobermuda warooga sp. n. are described from Heron Island and Lizard Island respectively, both in the Great Barrier Reef. The genus Tenupedunculus is revised and a new diagnosis presented, with Tenupedunculus virginale Schultz, 1982, T. pulchrum (Schultz, 1982), and T. serrulatus sp. n. being retained within the genus, and the remaining species here regarded as Stenetriidae incertae sedis (eight species).
... Serov and Wilson (1995) provided the only comprehensive generic review and reappraisal of this family. More recently the genera Machatrium Bruce &Buxton, 2013 andOnychatrium Bruce &Cumming, 2015 were described, including new species from the Great Barrier Reef, Australia. Marine stenetriids are diverse, abundant and omni-present on coral reefs (Kensley 1984a;1988;Müller 1990;1991a, b;Kensley and Schotte 2002;Martin et al. 2003), but still remains relatively poorly documented in tropical Australia (see Bruce and Cumming 2015). ...
... Sampling. See Bruce (2015) and Bruce and Buxton (2013) for details of sampling methods and locations. ...
The genera Tenupedunculus Schultz, 1982 and Stenobermuda Schultz, 1979 are recorded for the first time from beyond the Southern Ocean, at the Great Barrier Reef, Australia. Tenupedunculus serrulatussp. n. and Stenobermuda waroogasp. n. are described from Heron Island and Lizard Island respectively, both in the Great Barrier Reef. The genus Tenupedunculus is revised and a new diagnosis presented, with Tenupedunculus virginale Schultz, 1982, T. pulchrum (Schultz, 1982), and T. serrulatussp. n. being retained within the genus, and the remaining species here regarded as Stenetriidae incertae sedis (eight species).
... Collection methods have recently been described by Bruce (2015) and Bruce and Buxton (2013). CReefs samples were all preserved in high-grade ethanol (a requirement of the CReefs program), without first fixing in formalin. ...
Citation: Galassi DMP, Bruce NL, Fiasca B, Dole-Olivier M-J (2016) A new family Lepidocharontidae with description of Lepidocharon gen. n., from the Great Barrier Reef, Australia, and redefinition of the Microparasellidae (Isopoda, Asellota). ZooKeys 594: 11–50. placed as genus incertae sedis in this family. The Lepidocharontidae is characterised by having rectangular or trapezoidal somites in dorsal view, a single free pleonite, a tendency to reduction of the coxal plates, and the unique uropodal morphology of a large and long uropodal protopod on which the slender uropodal exopod articulates separately and anteriorly to the endopod. Lepidocharon Galassi & Bruce, gen. n. has a 6-segmented antennula, a well-developed antennal scale (rudimentary exopod), long and slender pereiopods 1–7 directed outwards, coxal plates rudimentary, incorporated to the lateral side of the sternites, not discernible in dorsal view, the single pleonite narrower than pereionite 7, scale-like elements bordering the proximal part of male pleopod 1 on posterior side, and stylet-guiding grooves of male pleopod 1 which run parallel to the outer lateral margins of the same pleopod.
... Collection methods have recently been described by Bruce (2015) and Bruce and Buxton (2013). CReefs samples were all preserved in high-grade ethanol (a requirement of the CReefs program), without first fixing in formalin. ...
Lepidocharontidae Galassi & Bruce, fam. n. is erected, containing Lepidocharon Galassi & Bruce, gen. n. and two genera transferred from the family Microparasellidae Karaman, 1934: Microcharon Karaman, 1934 and Janinella Albuquerque, Boulanouar & Coineau, 2014. The genus Angeliera Chappuis & Delamare Deboutteville, 1952 is placed as genus incertae sedis in this family. The Lepidocharontidae is characterised by having rectangular or trapezoidal somites in dorsal view, a single free pleonite, a tendency to reduction of the coxal plates, and the unique uropodal morphology of a large and long uropodal protopod on which the slender uropodal exopod articulates separately and anteriorly to the endopod. Lepidocharon Galassi & Bruce, gen. n. has a 6-segmented antennula, a well-developed antennal scale (rudimentary exopod), long and slender pereiopods 1–7 directed outwards, coxal plates rudimentary, incorporated to the lateral side of the sternites, not discernible in dorsal view, the single pleonite narrower than pereionite 7, scale-like elements bordering the proximal part of male pleopod 1 on posterior side, and stylet-guiding grooves of male pleopod 1 which run parallel to the outer lateral margins of the same pleopod. Lepidocharon priapus Galassi & Bruce, sp. n., type species for the genus, and Lepidocharon lizardensis Galassi & Bruce, sp. n. are described from Lizard Island, northern Great Barrier Reef. The most similar genus is Microcharon, both genera sharing the same general organization of the male pleopods 1 and 2, topology and architecture of the stylet-guiding groove of male pleopod 1, morphology of female operculum, presence of 2 robust claws of different lengths on pereiopodal dactylus 1–7, not sexually dimorphic. Lepidocharon gen. n. differs from Microcharon in the shape of the pereionites, very reduced coxal plates, the presence of imbricate scale-like elements bordering the proximal postero-lateral margins of the male pleopod 1, and the topology of the pereiopods, which are ventro-laterally inserted and directed outwards in Lepidocharon gen. n. and dorso- laterally inserted and directed ventrally in Microcharon. Lepidocharon shares with the genus Janinella the morphology of the tergites and the reduced lacinia mobilis of the left mandible, but differs significantly from Janinella in having a well-developed antennal scale, very reduced coxal plates also in females bearing oostegites, the general morphology and spatial arrangement of the stylet-guiding groove of male pleopod 1 and the possession of a 6-segmented antennula. The family Microparasellidae is redefined as monotypic, the only genus being Microparasellus Karaman, 1933.
... In the Australian context the primary regional gaps in documentation are the western and northern coral reefs, and the major taxonomic gap was and remains the Asellota, which in 2010 was represented by merely three species: Joeropsis sandybrucei Bruce, 2009; Ascionana magnetica Just & Wilson, 2004; and Prethura hutchingsae Kensley, 1982. Recent publications (Bruce & Buxton 2013;Bruce 2015;Shimomura & Bruce 2012) have started to redress this imbalance. A focus of attention has been the family Stenetriidae Hansen, 1905, which is both diverse and abundant on coral reefs (see Kensley 1984;Kensley & Schotte 2002;Müller 1990Müller , 1991aMartin et al. 2003), being represented in Australia by at least eight genera (Bruce & Buxton 2013). ...
Onychatrium gen. nov. is described, with five included species: Onychatrium forceps sp. nov., the type species and Onychatrium torosus sp. nov., both from the Great Barrier Reef; Onychatrium entale (Nordenstam, 1946) comb. nov., from Tapateuen (= Tabiteue Island), Gilbert Islands; Onychatrium thomasi (Bolstad & Kensley, 1999) comb. nov., from Madang, Papua New Guinea; and Onychatrium echiurum (Nobili, 1906) comb. nov., and species inquirenda from the Tumaotu Islands, Eastern French Polynesia. The primary distinguishing characters for Onychatrium gen. nov. are a trapezoid pseudosrostrum, the male pereopod 1 with elongate dactylus (4.7-7.3 as long as proximal width), propodus with strongly produced and acute lobe, carpus with a distally acute, flat, ventrally directed process (except O. torosus sp. nov., which has a short and truncate process) and the merus with a distally directed inferodistal lobe. The genus is known only from the southern Pacific, from the Tuamotus (eastern French Polynesia) to the Great Barrier Reef and northern Papua New Guinea.
