A new helicopsychid caddisfly, Palaeohelicopsyche marki sp. nov., is described from Eocene Baltic amber. The extinct genus Palaeohelicopsyche is now represented by three species alongside the genus Helicopsyche, with five extinct species in Baltic amber. The male of the new species is notable for its androconial head organs in the form of paired eversible tubes, a feature rarely found in males of fossil helicopsychids and apparently unknown in extant species. The structure and function of these remarkable male organs are discussed.

Temnospondyl finds rank among the most abundant remains throughout the continental Triassic deposits. In the Central European Basin, they are especially numerous, with diversity peaks in the Röt, Erfurt and Stuttgart formations. Currently, a total of 20 genera and 29 species of temnospondyls is recognized in the German Triassic. The Early Triassic temnospondyl assemblages encompass the five genera Trematosaurus, Sclerothorax, Odenwaldia, Meyerosuchus, and Parotosuchus. Trematosaurus is present with the coeval species T. brauni and T. thuringiensis whereas Parotosuchus is known with the three species P. helgolandicus, P. nasutus and the newly erected P. decumanticus n. sp. from the Black Forest from different time slices. Sclerothorax is known from two widely divergent horizons in the early and late Olenekian of Hesse, whereas Odenwaldia and fragmentarily known Meyerosuchus are from localities in the Black Forest and almost coeval horizons dating late Olenekian. In the Middle Triassic the ten temnospondyl genera Plagiosuchus, Plagiosternum, Megalophthalma, Gerrothorax, Trematolestes, Callistomordax, Eocyclotosaurus, Stenotosaurus, Tatrasuchus and Mastodonsaurus (two species) are recognized. Kupferzellia Schoch, 1997 is a junior synonym of Tatrasuchus Maryanska & Shishkin, 1996. The coeval early Anisian Eocyclotosaurus and Stenotosaurus are morphologically similar but distinct in palate features, whereas the other taxa all fall within the late Ladinian interval of the Erfurt Formation. The lost type and only specimen of “Cyclotosaurus” papilio was most consistent with the genus Eocyclotosaurus. The Late Triassic rock sequence has yielded the six valid genera Plagiosaurus, Gerrothorax, hyperokynodon, Metoposaurus, Capitosaurus and Cyclotosaurus, the latter with the five species C. robustus, C. buechneri, C. ebrachensis, C. posthumus and C. hemprichi. In the Rhaetian, reworked remains may only be referred to indeterminate plagiosaurines and capitosauroids.

Archostemata is a species-poor group of beetles. However, the morphological diversity of the group is still not completely grasped since many ingroups are only known by the adult representatives. Micromalthus debilis is often the most discussed representative of this group in literature and stands as an example of a complex and unique life cycle. The rest of the known representatives do not have such specialised life cycles. However, in many groups, only the ecology of the adults is known and the few known larvae show specialisations of softwood-borers. Here we summarise the known larvae of Archostemata and report a new fossil from Eocene Baltic amber. The new specimen shows many morphological characters known from modern larvae of Archostemata (e.g., the broad head or the distinct posteromedian indentation of the head capsule) and is highly likely a larval representative of the group, and therefore, represents the first larva of Archostemata from the Eocene. We also study and discuss two additional unidentified fossil specimens with similar body outlines originating from Cretaceous Myanmar amber. Additionally, we analysed all the available specimens with quantitative methods, both fossil and modern, new and from literature.