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Article Reference Endocranial anatomy and phylogenetic position of the crocodylian Eosuchus lerichei from the late Paleocene of northwestern Europe and potential adaptations for transoceanic dispersal in gavialoids
Eosuchus lerichei is a gavialoid crocodylian from late Paleocene marine deposits of northwestern Europe, known from a skull and lower jaws, as well as postcrania. Its sister taxon relationship with the approximately contemporaneous species Eosuchus minor from the east coast of the USA has been explained through transoceanic dispersal, indicating a capability for salt excretion that is absent in extant gavialoids. However, there is currently no anatomical evidence to support marine adaptation in extinct gavialoids. Furthermore, the placement of Eosuchus within Gavialoidea is labile, with some analyses supporting affinities with the Late Cretaceous to early Paleogene “thoracosaurs.” Here we present novel data on the internal and external anatomy of the skull of E. lerichei that enables a revised diagnosis, with 6 autapormorphies identified for the genus and 10 features that enable differentiation of the species from Eosuchus minor. Our phylogenetic analyses recover Eosuchus as an early diverging gavialid gavialoid that is not part of the “thoracosaur” group. In addition to thickened semi-circular canal walls of the endosseous labyrinth and paratympanic sinus reduction, we identify potential osteological correlates for salt glands in the internal surface of the prefrontal and lacrimal bones of E. lerichei. These salt glands potentially provide anatomical evidence for the capability of transoceanic dispersal within Eosuchus, and we also identify them in the Late Cretaceous “thoracosaur” Portugalosuchus. Given that the earliest diverging and stratigraphically oldest gavialoids either have evidence for a nasal salt gland and/or have been recovered from marine deposits, this suggests the capacity for salt excretion might be ancestral for Gavialoidea. Mapping osteological and geological evidence for marine adaptation onto a phylogeny indicates that there was probably more than one independent loss/reduction in the capacity for salt excretion in gavialoids.
Located in Library / RBINS Staff Publications 2024 OA
Article Reference The cranium and dentition of Khirtharia (Artiodactyla, Raoellidae): new data on a stem taxon to Cetacea
Raoellid mammals are small artiodactyls from the Eocene of Asia, hypothesized to be closely related to stem Cetacea. Knowledge of the cranial and dental morphology of Raoellidae comes mostly from one species, Indohyus indirae. Here we describe new material of another raoellid genus, Khirtharia, based on material retrieved from the Kalakot area, Jammu and Kashmir. This new material, comprising an almost complete, lightly deformed cranium and a partial snout with associated partial mandible, greatly adds to our knowledge of raoellid morphology. It highlights the similarity of cranial characters with Indohyus, such as a long snout with raptorial incisors, a thick and narrow supraorbital region, a strong postorbital constriction, a triangular shaped braincase, and a thickened medial wall to the auditory bulla (involucrum). The new specimen is similar to Indohyus cranially but differs dentally in being more bunodont. The presence of these traits in two different raoellid genera suggests they may be present more broadly across Raoellidae. These characters are also observed in early cetaceans, highlighting the need to investigate their phylogenetic impact. Some cranial features support aquatic habits of members of this family.
Located in Library / RBINS Staff Publications 2024 OA
Article Reference An ichthyological borderland: The fishfauna of Nyungwe National Park and surroundings (Rwanda, East Africa)
Nyungwe National Park (NP) is a mountainous region situated in the southwestern part of Rwanda on Congo-Nile watershed. In spite of the high biodiversity in pri- mates, birds and plants, no fish were reported to occur in the park, probably because of the cold temperatures of the rivers. An expedition in 2022 examined the fish diver- sity within the Nyungwe NP and its buffer zones. Additional sampling was performed in the main river draining the park into Lake Kivu: the Kamiranzovu. Three hundred and twenty specimens belonging to 13 species were collected. Specimens were col- lected only in the western part of the park, draining towards the Congo basin. The diversity within the park proper was limited to two putative species within the com- plex of Amphilius cf. kivuensis, which were caught on either side of the Kivu–Rusizi watershed. In contrast, a higher fish diversity, including one clariid species and two species of Enteromius, was observed in the rivers at a lower altitude of the buffer zone. However, the highest species diversity was found near the mouth of Kamiran- zovu River, including 11 species, of which 4 were non-native: the guppy Poecilia reti- culata, Astatotilapia burtoni, the blue-spotted tilapia Oreochromis leucosticus and the Egyptian mouth-brooder Pseudocrenilabrus multicolor.
Located in Library / RBINS Staff Publications 2025
Article Reference The bats of the Congo and of Rwanda and Burundi Revisited (Mammalia: Chiroptera)
Located in Library / RBINS Staff Publications 2017
Article Reference The complete phylogeny of extant pangolins: scaling up the molecular tracing of the most trafficked mammals on earth
Located in Library / RBINS Staff Publications 2017
Article Reference Genetic turnovers and northern survival during the last glacial maximum in European brown bears
Located in Library / RBINS Staff Publications 2018
Article Reference Consequences of past climate change and recent human persecution on mitogenomic diversity in the arctic fox
Located in Library / RBINS Staff Publications 2019
Article Reference Ancient DNA suggests modern wolves trace their origin to a Late Pleistocene expansion from Beringia
Located in Library / RBINS Staff Publications 2019
Article Reference Penaeus aztecus Ives, 1891 (Crustacea, Decapoda), in the Scheldt estuary (Belgium): Isolated record or forerunner of a penaeid invasion?
A single specimen of the penaeid prawn Penaeus aztecus (Ives, 1891) was recorded in 2018 in the brackish zone of the Scheldt estuary near Antwerp (Belgium). The presence of this species, native to the West Atlantic, might result either from ships' ballast water coming from transatlantic boat shipping, from illegal import or from a considerable expansion leap northwards from the Mediterranean Sea, where this species has recently established and now has rapidly expanding invasive populations.
Located in Library / RBINS Staff Publications 2020
Article Reference A double-sided ivory comb with two animal pursuit scenes from a 6th century CE burial at Deiningen, Germany
In the Roman world, as in many other cultures, ivory was perceived as raw material suitable for the carving of prestigious personal items. The types of Roman and Late Antique carved ivory objects that survived as well as their quantity and stylistic range is probably a result of their preservation contexts as well as their appreciation and sometimes ongoing use in later epochs. Regarding ivory combs decorated with bas-relief carvings, only nine specimens are ascribed to the Mediterranean and NW-Europe during Late Antiquity, all exclusively present biblical iconography. Information about their origin, object history and age is usually very limited. The first evidence that hunting scenes were still part of the ivory carving tradition in Late Antiquity is provided by a comb discovered in a mid-6th-century male inhumation burial at Deiningen, Nördlinger Ries. In addition to stylistic and technological comparison, SEM-imaging, ZooMS, ancient DNA (aDNA) sequencing and 87Sr/86Sr isotope ratios were applied to identify the species and possible origin. While size and structure point toward Loxodonta africana as a likely source, poor preservation of the material hindered more refined results by ZooMS or aDNA analyses and consequently a precise triangulation of the source area in combination with the strontium isotope ratios. Besides being a singular piece of craftsmanship, the ivory comb fits into an assumed network of production and distribution that spanned from Northern Africa to the Frankish realm north of the Alps.
Located in Library / RBINS Staff Publications 2026