Craspedacusta sowerbii, Lankester 1880 – population dispersal analysis using COI and ITS sequences

Fritz, Gisela B.; Pfannkuchen, Martin; Reuner, A.; Schill, Ralph O.; Brümmer, Franz

doi:10.4081/jlimnol.2009.46

Cited by 24 publications

(29 citation statements)

References 35 publications

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“…comm.). In this case, Article 33.3.1 of the ICZN (1999) about the predominant use of erroneous spellings cannot be applied (indeed, according to Fritz et al (2009) it is about 40 % of all references). Thus, in order to avoid the use of 'sowerbyi', all references to the species of Lankester in this paper will be made with the original spelling.…”

Section: Nomenclatural Remarksmentioning

confidence: 99%

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Hidden diversity under morphology–based identifications of widespread invasive species: the case of the ‘well–known’ hydromedusa Craspedacusta sowerbii Lankester 1880

Oualid¹,

Iazza²,

Tamsouri³

et al. 2019

Anim. Biodiv. Conserv.

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2019. Hidden diversity under morphology-based identifications of widespread invasive species: the case of the 'well-known' hydromedusa Craspedacusta sowerbii Lankester 1880. Animal Biodiversity and Conservation, Doi: https://doi. AbstractHidden diversity under morphology-based identifications of widespread invasive species: the case of the 'wellknown' hydromedusa Craspedacusta sowerbii Lankester 1880. A relatively scarce number of morphological features available for delimiting closely related species and an increasingly worrisome scenario on Global Climate Change causing the rapid dispersion of invasive alien species can lead to the rapid spread of reports of a given species around the world. Craspedacusta sowerbii Lankester, 1880 is considered the most widespread freshwater jellyfish species and has been reported in numerous locations on all continents except Antarctica. Recently, a few medusae attributed to C. sowerbii were collected from a water reservoir (Bin El Ouidan) in Morocco, this being the first confirmed record of the species from North Africa. The morphology of these newly collected specimens agrees well with previous descriptions, but mitochondrial (Cox1 and 16S) and nuclear ITS (ITS1-5,8S-ITS2) molecular data lead to a discussion of a more complex general view concerning the number of species, synonyms and nomenclatural problems hidden behind the reports of Craspedacusta sowerbii. ResumenLa diversidad oculta en las identificaciones basadas en la morfología de especies invasoras de amplia distribución: el caso de la "bien conocida" hidromedusa Craspedacusta sowerbii Lankester 1880. El número relativamente escaso de características morfológicas utilizadas para delimitar especies estrechamente relacionadas y el panorama cada vez más preocupante en el que el cambio climático global provoca la rápida dispersión de especies exóticas invasoras pueden conducir a la difusión precipitada por todo el mundo de informes sobre una especie determinada. Craspedacusta sowerbii Lankester, 1880, que se considera la especie de medusa de agua dulce más extendida, ha sido observada en numerosos lugares en todos los continentes, excepto en la Antártida. Recientemente, se recogieron algunas medusas atribuidas a C. sowerbii en un embalse artificial (Bin El Ouidan) en Marruecos, que representaron el primer registro confirmado de la especie en el norte de África. La morfología de estos especímenes recién recolectados concuerda con las descripciones anteriores, pero los datos moleculares mitocondriales (Cox1 y 16S) y nucleares ITS (ITS1-5,8S-ITS2) suscitan un debate general más complejo con respecto al número de especies, las sinonimias y los problemas nomenclaturales ocultos tras los informes de Craspedacusta sowerbii.Hidden diversity under morphology-based identifications of widespread invasive species: the case of the 'well-known' hydromedusa Craspedacusta sowerbii Lankester 1880

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Section: Nomenclatural Remarksmentioning

confidence: 99%

“…The freshwater genus Craspedacusta includes a still uncertain number of hydromedusan species (Bouillon et al, 2006;Fritz et al, 2009;. The most reported species around the world in this genus is Craspedacusta sowerbii Lankester, 1880, which can be found in all continents and subcontinents except Antarctica (Dumont, 1994).…”

Section: Introductionmentioning

confidence: 99%

Hidden diversity under morphology–based identifications of widespread invasive species: the case of the ‘well–known’ hydromedusa Craspedacusta sowerbii Lankester 1880

Oualid¹,

Iazza²,

Tamsouri³

et al. 2019

Anim. Biodiv. Conserv.

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“…Among them, Craspedacusta sowerbyi (Hydrozoa, Trachylina, Limnomedusae) is the most widely distributed species [13]. It is considered that this species is originated from the Yangtze River area in China [13], [14], but has been dispersed to many freshwater habitats in the world [15], [16], [17], [18], [19], [20]. The hydrozoan has two adult forms, the fixed polyp, and the free-living medusa, with the latter being the sexual form, occurring sporadically in different season of the year, although more commonly during summer in temperate regions [18].…”

Section: Introductionmentioning

confidence: 99%

Mitochondrial Genome of the Freshwater Jellyfish Craspedacusta sowerbyi and Phylogenetics of Medusozoa

Zou

Zhang

et al. 2012

PLoS ONE

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The 17,922 base pairs (bp) nucleotide sequence of the linear mitochondrial DNA (mtDNA) molecule of the freshwater jellyfish Craspedacusta sowerbyi (Hydrozoa,Trachylina, Limnomedusae) has been determined. This sequence exhibits surprisingly low A+T content (57.1%), containing genes for 13 energy pathway proteins, a small and a large subunit rRNAs, and methionine and tryptophan tRNAs. Mitochondrial ancestral medusozoan gene order (AMGO) was found in the C. sowerbyi, as those found in Cubaia aphrodite (Hydrozoa, Trachylina, Limnomedusae), discomedusan Scyphozoa and Staurozoa. The genes of C. sowerbyi mtDNA are arranged in two clusters with opposite transcriptional polarities, whereby transcription proceeds toward the ends of the DNA molecule. Identical inverted terminal repeats (ITRs) flank the ends of the mitochondrial DNA molecule, a characteristic typical of medusozoans. In addition, two open reading frames (ORFs) of 354 and 1611 bp in length were found downstream of the large subunit rRNA gene, similar to the two ORFs of ORF314 and polB discovered in the linear mtDNA of C. aphrodite, discomedusan Scyphozoa and Staurozoa. Phylogenetic analyses of C. sowerbyi and other cnidarians were carried out based on both nucleotide and inferred amino acid sequences of the 13 mitochondrial energy pathway genes. Our working hypothesis supports the monophyletic Medusozoa being a sister group to Octocorallia (Cnidaria, Anthozoa). Within Medusozoa, the phylogenetic analysis suggests that Staurozoa may be the earliest diverging class and the sister group of all other medusozoans. Cubozoa and coronate Scyphozoa form a clade that is the sister group of Hydrozoa plus discomedusan Scyphozoa. Hydrozoa is the sister group of discomedusan Scyphozoa. Semaeostomeae is a paraphyletic clade with Rhizostomeae, while Limnomedusae (Trachylina) is the sister group of hydroidolinans and may be the earliest diverging lineage among Hydrozoa.

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“…Within the genus Craspedacusta, 11 species were originally described (Jankowski 2001), native of the Yangtze River area in China (Kramp 1961), which were synonymised into the two species Craspedacusta sowerbii and Craspedacusta sinensis, following morphological (Jankowski 2001) and molecular phylogenetic analysis (Fritz et al 2009;Zhang et al 2009). Among the two species, only C. sowerbii has been recognized as a cosmopolitan invader (Rayner 1988;Dumont 1994), probably due to specific adaptations favouring dispersal such as the capacity to develop a durable, chitin covered, resting body (Acker & Muscat 1976;Bouillon & Boero 2000), several forms of vegetative reproduction (Reisinger 1957), and longterm survival without sexual reproduction (Fritz et al 2007).…”

Section: Introductionmentioning

confidence: 99%

A new record of Craspedacusta sowerbii, Lankester 1880 (Cnidaria, Limnomedusae) in Northern Italy

Stefani¹,

Leoni²,

Marieni³

et al. 2010

J Limnol

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A new record of the freshwater jellyfish Craspedacusta sowerbii in Northern Italy is reported. The medusae bloom occurred in a small oligo-mesotrophic artificial lake during July, 2009. At the time of sampling, the medusae were all immature, reached low density and showed feeding preference towards the Daphnia complex of species, the most abundant zooplanktonic species in the lake. Negative feeding selectivity towards small Rotifera was demonstrated. The occasional occurrence of a C. sowerbii bloom in this lake suggests the distribution range of this species may be largely underestimated, and its potential impact on the zooplankton community remains unknown.

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Craspedacusta sowerbii, Lankester 1880 – population dispersal analysis using COI and ITS sequences

Abstract: Craspedacusta

Cited by 24 publications

References 35 publications

Hidden diversity under morphology–based identifications of widespread invasive species: the case of the ‘well–known’ hydromedusa Craspedacusta sowerbii Lankester 1880

Hidden diversity under morphology–based identifications of widespread invasive species: the case of the ‘well–known’ hydromedusa Craspedacusta sowerbii Lankester 1880

Mitochondrial Genome of the Freshwater Jellyfish Craspedacusta sowerbyi and Phylogenetics of Medusozoa

A new record of Craspedacusta sowerbii, Lankester 1880 (Cnidaria, Limnomedusae) in Northern Italy

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