DNA barcoding reveals cryptic diversity in marine hydroids (Cnidaria, Hydrozoa) from coastal and deep‐sea environments

Moura, Carlos J.; Harris, D. James; Cunha, Marina R.; Rogers, Alex D.

doi:10.1111/j.1463-6409.2007.00312.x

Cited by 95 publications

(96 citation statements)

References 84 publications

(91 reference statements)

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“…However, the analysis of morphology does not show a clear differentiation between these clades. This is in line with the results of several recent studies which suggested that many widespread marine invertebrates taxa comprise genetically divergent cryptic species (Sponer and Roy 2002;Moura et al 2008;Chen and Hares 2011). Additionally, in the order Amphipoda, cryptic speciation has been widely reported, especially for gammarids (Costa et al 2009;Radulovici et al 2009;Baird et al 2011).…”

Section: Taxonomic Issuessupporting

confidence: 77%

Long-distance dispersal, low connectivity and molecular evidence of a new cryptic species in the obligate rafter Caprella andreae Mayer, 1890 (Crustacea: Amphipoda: Caprellidae)

et al. 2012

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The amphipod Caprella andreae Mayer, 1890 was recorded for the first time in Southern Iberian Peninsula (36°44 0 15 00 N, 3°59 0 38 00 W). This species is the only obligate rafter of the suborder Caprellidea and has been reported to attach not only to floating objects such as ropes or driftwoods but also to turtle carapaces. Mitochondrial and nuclear markers were used to examine dispersal capabilities and population genetic structure of C. andreae across seven localities in the Mediterranean and Atlantic Ocean collected from floating substrata with different dispersal patterns. The strong population differentiation with no haplotypes shared between populations suggests that C. andreae is quite faithful to the substratum on which it settles. In addition, the proportionally higher genetic diversity displayed in populations living on turtles as well as the presence of highly differentiated haplotypes in the same turtle population may be indicative that these populations survive longer, which could lead C. andreae to prefer turtles instead of floating objects to settle and disperse. Therefore, rafting on floating objects may be sporadic, and ocean currents would not be the most important factor shaping patterns of connectivity and population structure in this species. Furthermore, molecular phylogenetic analyses revealed the existence of a cryptic species whose estimates of genetic divergence are higher than those estimated between C. andreae and other congeneric species (e.g. Caprella dilatata and Caprella penantis). Discovery of cryptic species among widely distributed small marine invertebrates is quite common and, in this case, prompts for a more detailed phylogenetic analysis and taxonomic revision of genus Caprella. On the other hand, this study also means the first record of the gammarids Jassa cadetta and Elasmopus brasiliensis and the caprellid Caprella hirsuta on drifting objects.

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Section: Taxonomic Issuessupporting

confidence: 77%

Long-distance dispersal, low connectivity and molecular evidence of a new cryptic species in the obligate rafter Caprella andreae Mayer, 1890 (Crustacea: Amphipoda: Caprellidae)

et al. 2012

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“…Based on this information, an uncorrected genetic distance of 0.05 (5%) was used as an approximate estimate of 'species' level designations for Antarctic nemerteans collected herein. Although previous work has shown 16S mtDNA sufficiently variable to assign taxonomic status in some groups of organisms (e.g., Vences et al 2005;Moura et al 2007), it is noted to be more conserved in nemerteans and other taxa than in the commonly used barcoding gene cytochrome c oxidase I (COI) (Thornhill et al 2008;Govindarajan et al 2005;Hebert et al 2003;Vences et al 2005;Wilson et al 2009), resulting in more conservative diversity estimates than COI data.…”

Section: Resultsmentioning

confidence: 99%

DNA uncovers Antarctic nemertean biodiversity and exposes a decades-old cold case of asymmetric inventory

et al. 2009

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With threats to biodiversity posed by anthropogenic impacts and global climate change, characterization of existing flora and fauna is increasingly important, but continues to focus predominantly on easily studied taxa. In the Southern Ocean, levels of species richness remain relatively unexplored due to remoteness and difficulties of sampling the region. Nemerteans (proboscis worms; ribbon worms) are unusually abundant and occasionally conspicuous in the Antarctic region. Despite being routinely collected, difficulties in preserving voucher material, morphological limitations, and shortage of taxonomic expertise have hindered our understanding of nemertean diversity. To assess patterns of diversity, we examined a fragment of the mitochondrial 16S rRNA gene from larval and adult nemerteans (n = 192) from 53 sites along the western Antarctic Peninsula. We found 20 distinct lineages having an uncorrected genetic distance (p) greater than 5% to the nearest sister taxon or group, 19 of which have not been genetically characterized in previous studies. Additionally, the putatively dominant adult species in the region, Parborlasia corrugatus, was found to comprise only 4.3% of larvae sampled (n = 3 out of 69 samples from 12 locations). Of 47 nemertean species recorded from Antarctic waters, 20 are heteronemerteans and therefore could have a pelagic pilidium larval phase. These results suggest that Antarctic biodiversity is underestimated, and that unknown species of nemerteans await description from Southern Ocean waters.

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“…Knowlton 1993; Moura et al 2007;Meyer et al 2008), while others seem to have only restricted ranges. Potential factors shaping species' range sizes have often been discussed in the literature (e.g.…”

Section: Zoogeography: Geographic Range Endemism and Dispersalmentioning

confidence: 99%

Are there widespread peracarid species in the deep sea (Crustacea: Malacostraca)?

Brandt¹,

Błażewicz-Paszkowycz²,

Bamber³

et al. 2012

Polish Polar Research

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Abstract:The global zoogeographic distribution of the most widespread peracarid species occurring in three or more ocean basins below 2000 m is analysed. Basing on the published data we investigated 45 peracarid species, which have a most widespread distribution and most likely are cosmopolitan. Thirty−three species have a wide distribution in the Northern Hemisphere. Most species occur in the North Atlantic, however, 16 of these species occur also in the North Pacific, a more limited number of species occurs in the South Atlantic or South Pacific The Southern Ocean displays some special zoogeographic features and 22 widespread species occur there below 2000 m, including highly eurybathic ones. In total, 11 of the analysed species occur in all oceans. Eucopia australis (Lophogastrida), Munneury− cope murrayi (Isopoda) and Eurythenes gryllus (Amphipoda) are the species with the wid− est distributions. Other peracarids occurring in all oceans are: the isopods Paramunnopsis oceanica and Eurycope sarsi, the mysid Caesaromysis hispida the lophogastrid Eucopia unguiculata, the amphipod Mesopleustes abyssorum and the tanaids Exspina typica, Para− narthura insignis and Pseudotanais nordenskioldi. No cumacean species has been reported with an ocean−wide distribution but Campylaspis glabra occurs in the Atlantic, Indian and Pacific oceans. Among plenty of rare species in each order there are only few species with wide distribution records. There is evidence from molecular genetic studies that some of the widespread peracarids represent several cryptic species, however, some, e.g. Eucopia aus− tralis, seem to be truly cosmopolitan species. Geography of sampling is biasing our view of biogeography. The history and quality of taxonomic work as well as the reliability of geo− graphic records (quality control of large databases) limits our investigations of widespread or cosmopolitan species as much as the limited knowledge of variation within most species causes difficulties in defining morpho−species with certainty.

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DNA barcoding reveals cryptic diversity in marine hydroids (Cnidaria, Hydrozoa) from coastal and deep‐sea environments

Cited by 95 publications

References 84 publications

Long-distance dispersal, low connectivity and molecular evidence of a new cryptic species in the obligate rafter Caprella andreae Mayer, 1890 (Crustacea: Amphipoda: Caprellidae)

Long-distance dispersal, low connectivity and molecular evidence of a new cryptic species in the obligate rafter Caprella andreae Mayer, 1890 (Crustacea: Amphipoda: Caprellidae)

DNA uncovers Antarctic nemertean biodiversity and exposes a decades-old cold case of asymmetric inventory

Are there widespread peracarid species in the deep sea (Crustacea: Malacostraca)?

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