Retecapsa tetralateralis Varol, in prep.
From Greek tetra (four) and Latin lateralis (lateral), referring to the four lateral bars per quadrant.
Species of Retecapsa are constructed of a cretarhabdid pelaga surrounding a large central area spanned by an axial cross that supports a distal process. The inter-cross area is occupied by lateral bars that delimit pores arranged in a single complete concentric cycle. Each quadrant typically contains five pores formed by four lateral bars, a feature characteristic of Retecapsa tetralateralis.
Retecapsa tetralateralis exhibits first-order, slightly greyish-white interference colours. In plan view under crossed polars, the pelaga shows inclined extinction and length-fast (–) elongation.