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Article Reference A new partial skeleton of Kryptobaatar from the Upper Cretaceous of Bayan Mandahu (Inner Mongolia, China) relaunch the question about variability in djadochtatherioid multituberculate mammals
A new well-preserved partial skeleton of the djadochtatheriid multituberculate Kryptobaatar is here described from the Campanian Bayan Mandahu Formation of the southern Gobi Basin in Inner Mongolia, China. We refer to it as Kryptobaatar sp. because it presents characters that are specific to Kryptobaatar dashzevegi and others specific to Kryptobaatar mandahuensis, as well as characters of its own. When those taxa are incorporated into a phylogenetic analysis of the Djadochtatherioidea, the Kryptobaatar species appear to be paraphyletic. This raises again questions about the high intraspecific variability in some multituberculates. Based on a comparison with the published specimens, we conclude that K. mandahuensis is a valid species, close to but distinct from K. dashzevegi. Our results also suggest that endemism alone in the Gobi Basin is not the cause of the high variability observed in the genus Kryptobaatar. But the impact of a possible difference in age or paleoenvironment between the different Kryptobaatar-bearing sites of the Gobi Desert is, for the moment, not possible to test in the current state of knowledge.
Located in Library / RBINS Staff Publications 2022
Article Reference A new phylogeny of cerapodan dinosaurs
Located in Library / RBINS Staff Publications 2020
Article Reference A new pipid from the Cretaceous of Africa (In Becetèn, Niger) and early evolution of the Pipidae
Pipimorpha and its crown-group Pipidae possess one of the most extensive fossil records among anurans, known since the Early Cretaceous in both Laurasia and Gondwana. Pipimorph diversification may have been driven by the breakup of West Gondwana during the Cretaceous. Numerous fossils from South America have been unearthed in the last decade, documenting this event. Unfortunately, Cretaceous pipimorphs from Africa have been limited to a few wellpreserved taxa from sub-Saharan Africa and the Arabian Peninsula, which hinders our comprehension of pipimorph diversification during this key period. The site of In Becetèn, in south-east Niger, is one of the few mid-Late Cretaceous (Coniacian–Santonian) sites from which a pipid, Pachycentrata taqueti, is known. Here, we describe and name a second pipid from the same locality. This taxon is known by a relatively complete braincase. Phylogenetic analyses confirm its position as a pipid, with pipinomorph affinities. This makes In Becetèn the oldest site with at least two pipids. Phylogenetic results are congruent with recent pipimorph relationships, with the presence of an endemic extinct clade in South America, Shelaniinae. The phylogenetic results also allow us to review the proposed definition for Pipimorpha and its subclades and propose new systematic definitions for them. Temporal calibration of the phylogenetic tree based on the fossil record suggests that pipimorphs diversified in a western Gondwana block and confirms that South America separated from Africa around the mid-Cretaceous. Between these two events, pipids diverged in Africa, giving rise to major extant clades. This study highlights the importance of Africa for early pipid diversification during the Cretaceous and of the opening of the Southern Atlantic Ocean for anuran dispersion and diversification.
Located in Library / RBINS Staff Publications 2023 OA
Article Reference A new pithanodelphinine dolphin from the Miocene of Peru and the origin of modern delphinidan families
Located in Library / RBINS Staff Publications
Article Reference A new Placodermi (Acanthothoraci) from the Early Devonian Jauf Formation (Saudi Arabia)
Located in Library / No RBINS Staff publications
Article Reference A new primitive hadrosauroid dinosaur from the Early Cretaceous of Inner Mongolia
Located in Library / RBINS Staff Publications
Article Reference A new province record for Allomyrina dichotoma Linnaeus, 1771 in China Nouvelle province chinoise pour Allomyrina dichotoma Linnaeus, 1771 (Coleoptera, Scarabaeidae, Dynastinae)
Located in Library / RBINS Staff Publications
Proceedings Reference A new record of a Paleogene cetacean (Basilosauridae, aff. Basilotritus) from the St. Pietersberg, Maastricht, Southeast Netherlands
Located in Library / RBINS Staff Publications
Article Reference A new sandstone-dwelling leaf-toed gecko (Gekkonidae: Dixonius mekongensis) from the Thai-Lao border
We describe Dixonius mekongensis sp. nov. from sandstone formations in Khong Chiam District, Ubon Ratchathani Province, in extreme eastern Thailand along the Laotian border. The new species differs from all currently recognized Dixonius by the following combination of morphological characters and pattern: maximal known snout-vent length of 51.2 mm; 16 longitudinal rows of dorsal tubercles; 32 to 34 paravertebral scales; 22 to 24 longitudinal rows of ventral scales across the abdomen; seven precloacal pores in males, no pores in females; a marked canthal stripe; and a spotted to uniform dorsal pattern. This description brings the number of Dixonius species to 13, with six species endemic to Thailand.
Located in Library / RBINS Staff Publications 2021
Article Reference A new species and first record of the cicada genus Sinotympana Lee, 2009 (Hemiptera: Cicadidae: Dundubiini) from Vietnam
Located in Library / RBINS Staff Publications 2019