Mouthparts and their setae of the intertidal isopod <i>Cirolana harfordi</i>

Thomson, Murray

doi:10.1111/jmi.12075

Cited by 8 publications

(8 citation statements)

References 57 publications

(98 reference statements)

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“…It has been reported to be a predator, a scavenger and a detritus feeder in its native range (Hewatt 1937;Johnson 1976). Previous studies have successfully collected C. harfordi using baited traps with dead fish (Bunting 2011;Thomson 2013), corroborating that this species is an active scavenger in Sydney Harbour.…”

Section: Introductionmentioning

confidence: 80%

Effects of the receiving assemblage and disturbance on the colonisation of an invasive species

et al. 2016

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evaluated the effects of the presence of organic matter of a different source (simulating a disturbance event affecting different habitats) on colonisation. A model generalist invader, the isopod Cirolana harfordi, was introduced to patches of oyster beds with (1) undisturbed (live) assemblages, (2) disturbed assemblages, (3) organic matter (using organic matter of a different source), or (4) no assemblage or organic matter. Our results indicated that the presence of an assemblage (disturbed or not) fostered colonisation; however, colonisation was less successful when the assemblage was undisturbed. Results also indicate that for a disturbance event to affect the colonisation of C. harfordi, it has to directly affect the invaded assemblage. These results add to the understanding of the factors driving invasions, which is important to design management strategies.

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Section: Introductionmentioning

confidence: 80%

Effects of the receiving assemblage and disturbance on the colonisation of an invasive species

et al. 2016

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“…The fourth article of the maxillipedal palp in Angeliera has one apical seta only instead of the two distal stiff setae present in all the other members of the family. As the maxilliped is considered homologous to the pereiopods (for details see Thompson 2013), the condition showed by Angeliera , with only one apical seta, coalescent with the fourth article, is to be considered a derived condition in the Janiroidea.…”

Section: Discussionmentioning

confidence: 99%

A new family Lepidocharontidae with description of Lepidocharon gen. n., from the Great Barrier Reef, Australia, and redefinition of the Microparasellidae (Isopoda, Asellota)

Galassi¹,

Bruce²,

Fiasca³

et al. 2016

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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.

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“…Collection of C. harfordi specimens was conducted at Sirius Cove, Sydney, NSW, Australia, using traps made from polyvinyl chloride piping and baited with canned fish as described previously (Thomson, ). The body of the trap was a piece of pipe (30 × 10 cm) that had an end cap fitted at either end.…”

Section: Methodsmentioning

confidence: 99%

Social aggregation of the marine isopodCirolana harfordidoes not rely on the availability of light‐reducing shelters

Salma

Thomson

2017

Physiol. Entomol

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Abstract. Social aggregation under shelters can afford benefits to animals such as protection from predators. Many isopods and insects are negatively phototactic and this may help them gravitate towards shelter. Previous studies show that, when placed in an arena with two red shelters, specimens of the marine isopod Cirolana harfordi and the terrestrial isopod Porcelio scaber pick one of the two shelters at random and aggregate under it, demonstrating social aggregation under light-reducing shelters. In the present study, an arena with two clear shelters was used to determine whether group sizes of 4, 8, 12 and 16 C. harfordi specimens display social aggregation when the shelters do not accommodate negative phototaxis. In all group sizes, C. harfordi specimens picked one of the shelters at random and significantly more animals aggregated under this shelter compared with the other. Cirolana harfordi also displayed aggregation in an arena with no shelters. Accordingly, C. harfordi specimens do not require shelters that reduce light to display social aggregation. The ability to locate suitable shelter under which there is no substantial reduction in light could benefit the animal in a natural environment comprising heavily shaded areas, as well as at night.

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Mouthparts and their setae of the intertidal isopod Cirolana harfordi

Cited by 8 publications

References 57 publications

Effects of the receiving assemblage and disturbance on the colonisation of an invasive species

Effects of the receiving assemblage and disturbance on the colonisation of an invasive species

A new family Lepidocharontidae with description of Lepidocharon gen. n., from the Great Barrier Reef, Australia, and redefinition of the Microparasellidae (Isopoda, Asellota)

Social aggregation of the marine isopodCirolana harfordidoes not rely on the availability of light‐reducing shelters

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