Occurrence of Moerisia lyonsi (Limnomedusae, Moerisiidae) in North America

Calder, Dale R.; Burrell, Victor G.

doi:10.2307/2485254

Cited by 21 publications

(8 citation statements)

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“…While a medusa very similar to ours has been found in Chesapeake Bay in the eastern USA and designated M. lyonsi Boulenger, 1908 by Calder andBurrell (1967), morphological differences in both the medusa and polyp phases of the life cycle (discussed below) prevent us from assigning the Suisun Slough Moerisia to that species.…”

Section: Moerisia Spsupporting

confidence: 64%

Non-indigenous hydromedusae in California's upper San Francisco Esturary: life cycles, distribution, and potential environmental impacts

Rees¹,

Gershwin²

2000

Sci. Mar.

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Section: Moerisia Spsupporting

confidence: 64%

Non-indigenous hydromedusae in California's upper San Francisco Esturary: life cycles, distribution, and potential environmental impacts

Rees¹,

Gershwin²

2000

Sci. Mar.

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“…Moerisia lyonsi is a small species (<2 cm bell diameter) that was introduced to Chesapeake Bay sometime prior to 1966 when it was first recorded (Calder & Burrell, 1967). It is thought to have originated in oligohaline waters of eastern Europe (Dumont, 1984); however, it thrived (≤13.6 medusae l -¹) in mesohaline (9-12 salinity) mesocosms, suggesting broader salinity tolerances (Purcell et al, 1999a).…”

Section: Moerisia Lyonsi (Boulenger) Hydromedusaementioning

confidence: 99%

Climate effects on formation of jellyfish and ctenophore blooms: a review

2005

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Much speculation and some evidence suggest that jellyfish and ctenophore populations have increased in recent decades. Unfortunately, few past records exist with which to compare current populations, and our knowledge of how environmental factors affect jellyfish population size is meagre. Human enterprise has wrought many changes in the ocean that are hypothesized to favour jellyfish, including eutrophication, reduction of fish stocks, and global warming. In addition to anthropogenic changes, natural climate cycles may affect jellyfish populations. Records of jellyfish and ctenophore abundance that appear to be related to indices of climate variations (temperature, salinity, North Atlantic Oscillation, North Pacific Decadal Oscillation, El Niño Southern Oscillation) are reviewed. In eleven species studied from subtropical, temperate and subarctic environments, warm temperatures were related to large population sizes; three scyphozoan species in the North Sea, and one mesopelagic hydromedusan were exceptions to that trend. One tropical scyphomedusan species was decimated by unusually warm, salty El Niño conditions in Palau. Because climate changes have complex ecosystem-level effects, the proximate causes of jellyfish increases are difficult to deduce. Therefore, the effects of temperature, salinity and prey on asexual production of new medusae from the benthic polyps of scyphomedusae and hydromedusae also are reviewed. Experiments on temperate species show greater and more rapid production of medusae at warmer temperatures. Salinity also had significant effects, and was especially important for estuarine species. Temperature and salinity affect asexual reproduction rates directly through metabolism, and indirectly through prey capture. Ocean warming may shift the distributions, expand the seasonal occurrence, and increase the abundances of temperate-boreal species. Populations living near their thermal maximum may suffer negative consequences of warming.

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“…Nevertheless, relationships of that species to M. gemmata (Ritchie, 1915) and M. gangetica Kramp, 1958, both described from the same general region of India, or to other nominal species currently assigned to the genus (Moerisia lyonsi Boulenger, 1908, Caspionema pallasi Derzhavin, 1912, Moerisia inkermanica Paltschikowa-Ostroumowa, 1925, Moerisia alberti Leloup, 1938, and Moerisia carine Bouillon, 1978b, have not been adequately explored. Moreover, a number of moerisiid records worldwide attributed to M. lyonsi, including accounts of mine (Calder 1971;Calder & Burrell 1967;Sandifer et al 1974), have been based on adult medusae with numerous (>20) marginal tentacles. As originally described by Boulenger (1908), however, mature medusae of that species normally have four tentacles.…”

Section: Genus Moerisia Boulenger 1908mentioning

confidence: 99%

Some anthoathecate hydroids and limnopolyps (Cnidaria, Hydrozoa) from the Hawaiian archipelago

Calder¹

2010

Zootaxa

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A systematic account is given of 17 families, 25 genera, and 32 species of anthoathecate hydroids and limnopolyps reported from Hawaii. Applying Reversal of Precedence provisions in zoological nomenclature, the familiar hydrozoan genus names Hydractinia Van Beneden, 1844a, Bimeria Wright, 1859a, and Porpita Lamarck, 1801 are designated as valid and as nomena protecta, while seldom-used older names threatening them (the synonyms Echinochorium Hassall, 1841 and Manicella Allman, 1859a, and the homonym Porpita Soldani, 1789 respectively) are relegated to nomena oblita. Also designated a nomen oblitum is the name Pyxidium Leuckart, 1856, threatening its junior but widely used synonym Ectopleura L. Agassiz, 1862. The species name Bimeria vestita Wright, 1859a is rendered valid and a nomen protectum, while its virtually unused senior synonym Manicella fusca Allman, 1859 becomes a nomen oblitum. Hydrodendrium Nutting, 1905 is reinstated as a valid genus, distinct from Hydractinia and replacing its junior objective synonym Nuttingia Stechow, 1909. The spelling of Hydrodendridae Nutting, 1905 is emended to Hydrodendriidae, but that family name is retained as a synonym of Hydractiniidae. Usage of the familiar generic name Sphaerocoryne Pictet, 1893 is upheld by recognizing it and its former senior subjective synonym Corynetes Haeckel, 1879 as valid. The correct spelling of the family name originally founded as Olindiadae Haeckel, 1879 is taken to be Olindiidae, and spelling of the species name Solanderia misakinensis (Inaba, 1892), first established as Dendrocryne (sic) misakii, is stabilized. One new species, Stylactaria munita, is described from shallow waters at Hawaii Kai, Oahu. Lectotypes are designated for Corydendrium corrugatum Nutting, 1905 and Corydendrium minor Nutting, 1905 (=Turritopsis minor), both originally described from Hawaii. Type material of Balea mirabilis Nutting, 1905 (=Balella mirabilis), originally described from waters between the islands of Molokai and Maui, could not be located. Six anthoathecate species [Corydendrium parasiticum (Linnaeus, 1767), Bimeria vestita, Amphinema sp., Eudendrium carneum Clarke, 1882, Ectopleura viridis (Pictet, 1893), and Sphaerocoryne bedoti Pictet, 1893] are recorded from Hawaii for the first time.

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Occurrence of Moerisia lyonsi (Limnomedusae, Moerisiidae) in North America

Cited by 21 publications

References 0 publications

Non-indigenous hydromedusae in California's upper San Francisco Esturary: life cycles, distribution, and potential environmental impacts

Non-indigenous hydromedusae in California's upper San Francisco Esturary: life cycles, distribution, and potential environmental impacts

Climate effects on formation of jellyfish and ctenophore blooms: a review

Some anthoathecate hydroids and limnopolyps (Cnidaria, Hydrozoa) from the Hawaiian archipelago

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