Rediscovered after 77 years: Odontodiaptomus thomseni – a rare species of calanoid (Crustacea: Copepoda) from South America

Perbiche‐Neves, Gilmar; Boxshall, Geoff A.; Rocha, Carlos Eduardo Falavigna da; Nogueira, Marcos Gomes

doi:10.1590/s1984-46702012000200010

Cited by 3 publications

(6 citation statements)

References 10 publications

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“…Compared to other records, this species occurs widely in the southern region and in the Paraná State (South) in Brazil, presenting a distribution range of about 1,000km. Another species of this genus, O. thomseni (Brehm 1933), was recently rediscovered at Salto Grande Reservoir in the low Uruguay River (Perbiche-Neves et al 2012), since 77 years had passed without any record. Moreover, the third species of this genus, O. michaelseni (Mrázek 1901), was not found since its original description.…”

Section: Estuary and Coastal Drainages Ecoregion (Figure 4)mentioning

confidence: 99%

New Diaptomidae records (Crustacea: Copepoda: Calanoida: Diaptomidae) in the Neotropical region

Previattelli¹,

Perbiche‐Neves²,

Santos-Silva³

2013

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TIn this study we present 208 new diaptomids records, including 36 species from 10 genera. They are the result of new samplings as well as of the revision of samples from previous surveys from various localities in the Neotropical Region. In an attempt to clear elucidate about the species ranges we gathered all biogeographically important data and present them here, with comments about the relevance of each record to the understanding of the distribution of the group.

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Section: Estuary and Coastal Drainages Ecoregion (Figure 4)mentioning

confidence: 99%

New Diaptomidae records (Crustacea: Copepoda: Calanoida: Diaptomidae) in the Neotropical region

Previattelli¹,

Perbiche‐Neves²,

Santos-Silva³

2013

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“…We consider that such inferences should be made with caution. In most cases there is little information on the population dynamics of the species and we found species such as Odontodiaptomus thomseni and Argyrodiaptomus bergi (Perbiche-Neves et al 2011, 2012) which had not been seen for several decades. Our understanding of the relationships between diaptomids and the various limnological parameters and trophic status of water bodies is not very robust and is made less secure given that these species inhabit artificial reservoirs but were originally inhabitants of lakes, ponds, and rivers.…”

Section: Discussionmentioning

confidence: 78%

“…83, SGRA-D). Only three individuals were found and a full re-description was published by Perbiche-Neves et al (2012). This species is on the red list of endangered species (IUCN–Red List of Threatened Species, 2010–Reid 1996), due to lack of recent records.…”

Section: Resultsmentioning

confidence: 99%

“…The only previous confirmed record of this species was its original description (Brehm 1933). There is a subsequent record of this species from pools in Venezuela, but it is doubtful and requires confirmation (Perbiche-Neves et al 2012). Ringuelet (1958) did not find this species in his work on Argentinian copepods, nor did Paggi and José de Paggi (1990).…”

Section: Resultsmentioning

confidence: 99%

“…The probability of a species being found again seems high when routine sampling is used (e.g. Perbiche Neves et al 2012). Another important issue is that adult diaptomids are scarce in lotic habitats, compared to lentic habitats.…”

Section: Discussionmentioning

confidence: 99%

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Identification guide to some Diaptomid species (Crustacea, Copepoda, Calanoida, Diaptomidae) of “de la Plata” River Basin (South America)

Perbiche‐Neves¹,

Boxshall²,

Previattelli³

et al. 2015

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An identification guide is presented for species of calanoid copepod family Diaptomidae from “de la Plata” River Basin (Argentina, Brazil, Bolivia, Paraguay and Uruguay). It was based on material collected during the summer and winter of 2010 from 43 sites across the eastern part and the lower stretches of this basin, the second largest in South America and the fourth in the world. The guide contains identification keys and species diagnoses for males and females, richly supported by scanning electronic micrographs and/or line drawings of 19 species. It also includes some general remarks on the taxonomy and phylogenetic relationships of these species. The key was adjusted to be useful for these species only, with separate keys for each sex, and is the first for females of South America. One species classified herein as incertae sedis was not included in the analysis. At least ten other species have previously been recorded in the basin but were not present in our samples. This is the first attempt to compile comprehensive taxonomic information on this group of copepods in this region, and it is expected to become a useful tool for biologists and young taxonomists interested in the crustacean biota of the Neotropical region.

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Regulation of the abundance and turnover of copepod species by temperature, turbidity and habitat type in a large river basin

et al. 2015

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Freshwater copepods were sampled in the La Plata River basin to identify the processes that affect beta diversity and to determine the main factors influencing their geographical distribution and patterns of endemism. Beta diversity patterns exhibited strong dissimilarity between locations; the turnover process was predominant and indicated a replacement of species along the basin. Redundancy analysis indicated the presence of two large sets of species separated geographically by a boundary zone, with several associated variables. Northern species were associated with water transparency and temperature, mean air temperature, mean air temperature during winter and minimum air temperature of coldest month, indicating that these species are not tolerant to low temperatures and are abundant in reservoirs that are common in the upper stretch of the Paraná River basin. Southern species were related with amplitude of air temperature, turbidity, total phosphorus and total suspended matter, indicating that these species are polythermic and have adapted to live in river stretches. From 20 environmental variables analyzed in our study, partial least squares analysis indicated four variables with increased retention of effects on copepod abundance: air temperature, minimum temperature of coldest month, turbidity and transparency. Because almost all of the species found in this study occurred across a wide range of habitat types, the cause of the separation between river and reservoir species could be considered to be more anthropogenic than natural, and it primarily affected species abundance. For certain members of the northern group of copepod species, distribution was dependent on high temperatures, whereas the distribution of the southern group indicated that the species were polythermic.

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Rediscovered after 77 years: Odontodiaptomus thomseni – a rare species of calanoid (Crustacea: Copepoda) from South America

Cited by 3 publications

References 10 publications

New Diaptomidae records (Crustacea: Copepoda: Calanoida: Diaptomidae) in the Neotropical region

New Diaptomidae records (Crustacea: Copepoda: Calanoida: Diaptomidae) in the Neotropical region

Identification guide to some Diaptomid species (Crustacea, Copepoda, Calanoida, Diaptomidae) of “de la Plata” River Basin (South America)

Regulation of the abundance and turnover of copepod species by temperature, turbidity and habitat type in a large river basin

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