Archangeliphausia Dzik & Ivantsov & Deulin 2004, GEN. NOV.

• Main Authors: Dzik, Jerzy, Ivantsov, Andrey Yu., Deulin, Yuriy V.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2004
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Eocaridacea; Anthracophausiidae; Archangeliphausia; Arkhangelsk
• Online Access: https://doi.org/10.5281/zenodo.5748183; http://treatment.plazi.org/id/03DFC827FFE5FFC1FECDF374FC99FC5C

ARCHANGELIPHAUSIA GEN. NOV. Type species: A. spinosa sp. nov. Diagnosis: A generalized anthracophausiid with abdominal pleura bearing a single small spine on their ventral margin. Etymology: Derived from the latinized name of Arkhangelsk and phausis (Greek = shine). Affinities: Brooks (1962) indicated a recessed ‘eye socket’ of the proximal segment of peduncle of antennules as the diagnostic character of his Anthracophausiidae. This feature is not represented in the new genus, which is quite generalized in this respect and may have been anatomically close to the Devonian eocaridids, as indicated also by the long abdominal pleura. However, the more general aspects of Anthracophausia listed by Brooks (1962) - weak sclerotization of generally smooth carapace, margins reinforced with an unusually narrow band, a short rostrum, and lateral flattening of the body due to compression - fit well the Russian material. The Carboniferous species of Anthracophausia reveal dramatically different outlines of abdominal pleura from those in the Russian species. In A. strongi Brooks, 1962, from the Late Carboniferous Mazon Creek fauna of Illinois, the pleural lobes of the abdominal tergites are broadly rounded. In A. dunsiana from the Early Carboniferous Glencartholm Volcanic Beds of Scotland they narrow to form a sharp apex (Schram, 1979). In the new species, rounded lobes are armed with short spines, which seems to be enough to substantiate its taxonomic distinction. Another possible difference between the Russian form and the Carboniferous species of Anthracophausia is the increasingly posterior orientation of the abdominal pleural lobes towards the telson (although not easily discernible because of strong flattening of the specimens). In fact, the faint parabolic lines visible on the paratype of A. strongi (Brooks, 1962; pl. 48: 3) may also indicate a similar shape of the posterior pleural lobes in that species. Some gradient in the shape of pleural lobes is also observable in A. dunsiana . All these distinguishing characters ...