Is the cosmopolitan model still valid for deep-sea podocopid ostracods?

Abstract

UELLINEK, T., SWANSON, K. & MAZZINt, I. (2006): Is the cosmopolitan model still valid for deep-sea podocopid ostracods? (With the discussion of two new species of the genus Pseudobosquetina GtJEV, NET & MOULI~DE 1994 and Cytheropteron testudo (Ostracoda) as case studies). -Senckenbergiana maritima, 36 (1): 29-50, 8 Figs.; Frankfurt a. M.]Despite the increasing recognition of a global shortage of taxonomists (the 'taxonomic impediment'; see the Governments Convention on Biological Diversity, Darwin Declaration 1998) and the impact this will have on our ability to scientifically assess loss ofbiodiversity in the context of contemporary global change, there has been little indication (accepting specific funding initiatives such as 'SINTHESu in Europe and 'PEET' in America) as to how young scientists might be encouraged to undertake training in that field, of what educational approach would be appropriate to train taxonomists. There is also clear evidence from the literature that many recognised protocols in terms of the methodology of taxonomy have been eschewed by numerous practitioners, such that problems associated with synonymy and homeomorphy must significantly impact on quantitative assessments of biodiversity in many groups of plants and animals. We use deep-sea podocopid ostracods (Crustacea) to illustrate how less than rigorous taxonomic practice not only leads to confusion with respect to definitions of individual taxa, but also affects on the total number of species and their inferred ecology, distribution and geological record. Descriptions

Climatically induced changes in late Quaternary bathyal ostracod assemblages of the Camamu Basin, Brazil

“…The hinge of P. pucketti sp. nov. is more robust than the specimens illustrated by Jellinek et al (2006), and the radial pore canals are predominantly branched. Moreover, those species are larger and present feeble reticulation in some parts of carapace, contrasting with P. pucketti sp.…”

The lower Eocene-lower Oligocene ostracodes from DSDP Site 515B, Brazil Basin, Southwestern Atlantic Ocean

“…In spite of the heterogeneity of the data, the absence of some genera in certain regions was also discussed by those authors (Coles et al, 1990, p. 299-300). Hence, the comparison of data from the DSDP site 515B to similar studies elsewhere brings additional information to the discussion on the pandemic distribution of deep-sea ostracodes as previously discussed by Schornikov (2005) and Jellinek et al (2006).…”

Are CO2‐rich seafloor pockmarks a suitable environment for ostracod assemblages? The example of the Zannone Giant Pockmark (central‐eastern Tyrrhenian)

“…Studies based only on carapace morphologies in smooth‐shelled ostracod species like Xestoleberis spp. can give rise to wider species definitions, thus artificially widespread geographical and stratigraphical distributions, than those based both on soft parts and valve morphology (Jellinek et al, 2006). It is interesting to note that recent abundant and well‐preserved ostracod assemblages have been recovered from methane seepage areas in the western Svalbard margin (Yasuhara et al, 2018) and hydrocarbon seeps (Degen et al, 2012), implying that they can survive in peculiar geochemical conditions.…”