Taxonomic review of Haliclystus antarcticus Pfeffer, 1889 (Stauromedusae, Staurozoa, Cnidaria), with remarks on the genus Haliclystus Clark, 1863

Miranda, Luc{ 'ılia S.; Morandini, André C.; Marques, Antônio Carlos

doi:10.1007/s00300-009-0648-8

Cited by 21 publications

(81 citation statements)

References 22 publications

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“…However, some of these characters vary ontogenetically, and must be cautiously employed to differentiate species (Uchida, 1929; Hirano, 1986; Miranda, Morandini & Marques, 2009). Additionally, the recent molecular phylogenetic hypothesis indicates the need to reassess and reinterpret many of the internal characters, such as the claustrum and the longitudinal muscles (see Miranda et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

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Comparative internal anatomy of Staurozoa (Cnidaria), with functional and evolutionary inferences

Miranda

Collins

Hirano

et al. 2016

PeerJ

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Comparative efforts to understand the body plan evolution of stalked jellyfishes are scarce. Most characters, and particularly internal anatomy, have neither been explored for the class Staurozoa, nor broadly applied in its taxonomy and classification. Recently, a molecular phylogenetic hypothesis was derived for Staurozoa, allowing for the first broad histological comparative study of staurozoan taxa. This study uses comparative histology to describe the body plans of nine staurozoan species, inferring functional and evolutionary aspects of internal morphology based on the current phylogeny of Staurozoa. We document rarely-studied structures, such as ostia between radial pockets, intertentacular lobules, gametoducts, pad-like adhesive structures, and white spots of nematocysts (the last four newly proposed putative synapomorphies for Staurozoa). Two different regions of nematogenesis are documented. This work falsifies the view that the peduncle region of stauromedusae only retains polypoid characters; metamorphosis from stauropolyp to stauromedusa occurs both at the apical region (calyx) and basal region (peduncle). Intertentacular lobules, observed previously in only a small number of species, are shown to be widespread. Similarly, gametoducts were documented in all analyzed genera, both in males and females, thereby elucidating gamete release. Finally, ostia connecting adjacent gastric radial pockets appear to be universal for Staurozoa. Detailed histological studies of medusozoan polyps and medusae are necessary to further understand the relationships between staurozoan features and those of other medusozoan cnidarians.

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Section: Discussionmentioning

confidence: 99%

“…Besides, there are species without white spots, such as H. antarcticus (cf. Miranda, Morandini & Marques, 2009), suggesting that the nematocysts produced in the internal subumbrellar epidermis would not need a “selective reservoir” (Weill, 1925; Weill, 1935) in order to become mature and migrate to the secondary tentacles.…”

Section: Discussionmentioning

confidence: 99%

Comparative internal anatomy of Staurozoa (Cnidaria), with functional and evolutionary inferences

Miranda

Collins

Hirano

et al. 2016

PeerJ

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“…Only 12 species were thought to occur in the Southern Hemisphere (Grohmann et al 1999;Lutz et al 2006), but these have recently been reduced to 11 (Miranda et al 2009). Most Southern Hemisphere species have been recorded at just one locality and are poorly known Á some of them require taxonomic revision and might be considered doubtful.…”

Section: Introductionmentioning

confidence: 95%

“…The 'ovoid' nematocysts described by Uchida (1929), whose work preceded Weill (1934), are probably also euryteles. Nematocysts of this shape have also been identified as euryteles in four species of Haliclystus (Gwilliam 1956), in Stenoscyphopsis vermiformis (Gwilliam 1956), Lucernaria janetae (Collins & Daly 2005), as ovoid and round euryteles in Haliclystus californiensis (Kahn et al 2010) and as microbasic heterotrichous euryteles in H. antarcticus (Miranda et al 2009). The narrower, sack-shaped nematocysts which we call here type 1 isorhizas are similar to 'atrich' capsules (a subgroup of isorhizas) described for H. octoradiatus (Weill 1934), four species of Haliclystus (Gwilliam 1956) and S. vermiformis (Gwilliam 1956).…”

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confidence: 94%

“…The narrower, sack-shaped nematocysts which we call here type 1 isorhizas are similar to 'atrich' capsules (a subgroup of isorhizas) described for H. octoradiatus (Weill 1934), four species of Haliclystus (Gwilliam 1956) and S. vermiformis (Gwilliam 1956). Rodshaped nematocysts which we called type 2 isorhizas are similar to 'rod-shaped' nematocysts in S. inabai (Uchida 1929), 'rod-shaped' and 'atrich' nematocysts of L. capensis (Carlgren 1938), 'isorhizas' in H. antarcticus (Miranda et al 2009) and 'atrichs' in L. campanulata (Weill 1934) and species of Manania (Gwilliam 1956;Larson & Fautin 1989). Collins & Daly (2005) use the term 'holotrich' (a subgroup of isorhizas) for nematocysts of this shape in L. janetae.…”

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New records of Staurozoa from Australian coastal waters, with a description of a new species ofLucernariopsisUchida, 1929 (Cnidaria, Staurozoa, Stauromedusae) and a key to Australian Stauromedusae

Zagal

Hirano

Mills

et al. 2011

Marine Biology Research

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Internal anatomy ofHaliclystus antarcticus(Cnidaria, Staurozoa) with a discussion on histological features used in staurozoan taxonomy

Miranda

Collins

Marques

2013

Journal of Morphology

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Stauromedusae have relatively few macromorphological characters, making both their taxonomy and identification difficult. For this reason, histological characters are also employed in the taxonomy of the group. This study presents a detailed description of the histomorphology of Haliclystus antarcticus Pfeffer, 1889 (Cnidaria, Staurozoa). We make new observations for the species and for the class, and address functional, taxonomical, and evolutionary aspects of staurozoan histo-anatomy. A complete reconstruction of H. antarcticus body plan is used to guide a more detailed observation, based on light microscopy, of structures rarely cited in the literature, such as the intertentacular lobules, the ostia between adjacent perradial pockets, and the male and female gonadal vesicles. Two possible regions of nematocyst formation are hypothesized and discussed. We also provide a review of the current use of histological characters in the taxonomy of the group. Understanding the body plan of stauromedusae is a challenge, because each single individual presents characters found in medusae and in polyps of other medusozoans. Comprehensive histological descriptions are important to establish relations of homology within Staurozoa and Cnidaria, providing crucial data on their evolution.

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Taxonomic review of Haliclystus antarcticus Pfeffer, 1889 (Stauromedusae, Staurozoa, Cnidaria), with remarks on the genus Haliclystus Clark, 1863

Cited by 21 publications

References 22 publications

Comparative internal anatomy of Staurozoa (Cnidaria), with functional and evolutionary inferences

Comparative internal anatomy of Staurozoa (Cnidaria), with functional and evolutionary inferences

New records of Staurozoa from Australian coastal waters, with a description of a new species ofLucernariopsisUchida, 1929 (Cnidaria, Staurozoa, Stauromedusae) and a key to Australian Stauromedusae

Internal anatomy ofHaliclystus antarcticus(Cnidaria, Staurozoa) with a discussion on histological features used in staurozoan taxonomy

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