Klausmuelleria is an extinct genus of Cambrian phosphatocopines from the Comley Limestone of the United Kingdom.

The second antennae are larger, with gnathobases, a large first podomere, a long endite on the endopod, alongside annuli with setae.

The mandible and first maxilla are both similar, although increasingly smaller, with slight differences in the structure of the spines.

The labrum is triangular with curved sides, with the possible position of eyes and the mouth obscured by matrix.

A possible third specimen with a much wider labrum and narrower sternum may also be known, however its position is dubious due to lack of soft tissue.