P. pauli was described from a solitary fossil, which is a
compression-impression fossil pair preserved in layers of soft
sedimentary rock. At the time of study, the holotype
counterpart and part were part of the paleoentomology collections housed by the
Museum National d’Histoire Naturelle. It was first studied by an international team of researchers headed by Manuel Dehon of the
University of Mons,
Belgium, and the team's 2014
type description of the species was published in the
natural sciences journal
PLOS ONE. The genus name is a combination of the
Greek word "protos" meaning
first and the genus
Habropoda of which
Protohabropoda is most similar. The
specific epithet pauli is a patronym coined in honor of Paul Léon Victor Vigot, a young bee systematics enthusiast. The size and shape of the
pterostigma are similar to those of the Apinae tribes
Anthophorini and
Centridini though the rounded shape of the wing and the sizes of the cells formed by the wing veins make it closer to Anthophorini. In the tribe,
P. pauli is identified from the living genera
Anthophora and
Amegilla by the positioning of veins and cells. and the genus
Habropoda is distinguished by vein length.
P. pauli is one of four bee species described by Dehon and team in the
PLOS ONE article, the others being
Andrena antoinei,
Bombus cerdanyensis, and
Euglossopteryx biesmeijeri. ==Description==