Fossils assigned to the predominantly deep-sea asteroid family Benthopectinidae Verrill, 1894 are described and their affinities reappraised. Detailed comparative morphology of ambulacrals, adambulacrals marginal ossicles has revealed that only some extinct taxa fall within morphological range modern representatives family. These include Jurapecten hessi Gale, 2011, J. infrajurensis sp. nov. (b...

The lower incisor enamel microstructure of the fossil rodent family Eomyidae was believed to be three-layered and highly derived but rather uniform throughout clade. Here, we describe a new four-layered schmelzmuster in consisting three-fold portio interna with longitudinal oriented, uniserial Hunter-Schreger bands one-fold externa, accounting for unique character combination Rodentia. This typ...

The southern African species of the mygalomorph spider genus Hermacha Simon, 1889, are revised. Eight redescribed: H. brevicauda Purcell, 1903; caudata 1889; evanescens fulva Tucker, 1917; lanata 1902; nigrispinosa sericea and tuckeri Raven, 1985. female male described for first time. Three new described: septemtrionalis, sp. nov., maraisae, montana, nov. On basis their genital morphology curvi...

Abstract The Cambrian evolutionary radiations are marked by spectacular biotic turnovers and the establishment of increasingly tiered food chains. At base these chains primary producers, which in fossil record chiefly represented among organic-walled microfossils. majority microfossil remains have traditionally been attributed to an informal category incertae sedis called “acritarchs,” based en...

Fishes from the uppermost Norian Fuchsberg Quarry near Seinstedt are represented by two taxa that we interpret as a teleosteomorph (complete specimens) and actinistian (scales). Seinstedtia parva gen. et sp. nov. is described; although it was proposed possible semionotiform, this study reveals possesses combination of features, for instance: characteristic pholidophoriform-shaped cranial roof; ...

ABSTRACT Moradisaurine captorhinid eureptiles were a successful group of high-fibre herbivores that lived in the arid low latitudes Pangaea during Permian. Here we describe palaeoassemblage from Permian Menorca (Balearic Islands, western Mediterranean), consisting ichnites small captorhinomorph eureptiles, probably moradisaurines ( Hyloidichnus ), and parareptiles (cf. Erpetopus bones two diffe...