Editing Ostracod (section)

==Palaeoclimatic reconstruction==
[[File:PermianOstracod.jpg|thumb|Articulated ostracod valves in cross-section from the [[Permian]] of central Texas; typical [[thin section]] view of an ostracod fossil]]
A new method is in development called mutual ostracod temperature range (MOTR), similar to the [[mutual climatic range]] (MCR) used for beetles, which can be used to infer palaeotemperatures.<ref name="Horne">{{cite journal |author=D. J. Horne |url=http://www.cosis.net/abstracts/EGU2007/00093/EGU2007-J-00093.pdf?PHPSESSID=e |title=A mutual temperature range method for European Quaternary non-marine Ostracoda |journal=Geophysical Research Abstracts |volume=9 |pages=00093 |year=2007 |format=[[Portable Document Format|PDF]]}}</ref> The ratio of oxygen-18 to oxygen-16 (δ18O) and the ratio of magnesium to calcium (Mg/Ca) in the calcite of ostracod valves can be used to infer information about past hydrological regimes, global ice volume and water temperatures.