DESCRIPTION AND FIGURES OF NEW LECTOTYPE AND PARALECTOTYPE MATERIAL OF RECENT BRACHIOPOD THECIDELLINA MAXILLA (HEDLEY, 1899)

Description and figures of new lectotype and paralectotype material of Recent brachiopod Thecidellina maxilla (Hedley, 1899)

The material LIP SHIMMER GUAVA of Thecidellina maxilla (Hedley, 1899) from the type locality has only been illustrated as line drawings, no images have previously been published.The illustrations were a reconstruction from more than one specimen and are inaccurate for the size of the cardinal process.Hedley (1899) did not designate a holotype; newl

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Isolation-by-distance and outbreeding depression are sufficient to drive parapatric speciation in the absence of environmental influences.

A commonly held view in evolutionary biology is Milk Carafe Coupling that speciation (the emergence of genetically distinct and reproductively incompatible subpopulations) is driven by external environmental constraints, such as localized barriers to dispersal or habitat-based variation in selection pressures.We have developed a spatially explicit

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