A5032322368- Paleontology and Evolutionary Biology
- Ichthyology and Marine Biology
- Evolution and Paleontology Studies
- Paleontology and Stratigraphy of Fossils
- Fish biology, ecology, and behavior
- Pleistocene-Era Hominins and Archaeology
- Geological and Geophysical Studies
- Geology and Paleoclimatology Research
- Rough Sets and Fuzzy Logic
- Spider Taxonomy and Behavior Studies
- Mollusks and Parasites Studies
- Paleopathology and ancient diseases
- Astro and Planetary Science
- Turtle Biology and Conservation
- Marine and fisheries research
- Data Mining Algorithms and Applications
- Machine Learning and Data Classification
Qujing Normal University
2020-2022
Institute of Vertebrate Paleontology and Paleoanthropology
2020-2021
Chinese Academy of Sciences
2020-2021
University of Birmingham
2012-2018
Sofia University "St. Kliment Ohridski"
2009-2010
Manchester Airport
2007
Although relationships among the major groups of living gnathostomes are well established, relatedness early jawed vertebrates to modern clades is intensely debated. Here, we provide a new description Gladbachus , Middle Devonian (Givetian approx. 385-million-year-old) stem chondrichthyan from Germany, and one very few chondrichthyans in which substantial portions endoskeleton preserved. Tomographic histological techniques reveal details gill skeleton, hyoid arch jaws, neurocranium,...
The Mongolepidida is an Order of putative early chondrichthyan fish, originally erected to unite taxa from the Lower Silurian Mongolia. present study reassesses mongolepid systematics through examination developmental, histological and morphological characteristics scale-based specimens Upper Ordovician Harding Sandstone (Colorado, USA) Llandovery–Lower Wenlock Yimugantawu (Tarim Basin, China), Xiushan (Guizhou Province, China) Chargat (north-western Mongolia) Formations. inclusion within...
Abstract Studies of O rdovician micromeric fish scales from the S andbian N orth A merica have identified a number scale‐based taxa potentially referable to chondrichthyans and therefore can be among stratigraphically oldest representatives clade described date. Two these, T ezakia hardingensis gen. et sp. nov. C anyonlepis smithae nov., are formally herein. composed exclusively tubular dentine possess polyodontocomplex crowns with characteristically large primordial odontode. Similar scale...
The Sinacanthida ordo nov. and Mongolepidida are spine- scale-based taxa whose remains encompass some of the earliest reported fossils chondrichthyan fish. Investigation fragmentary material from Early Silurian Tataertag Ymogantau Formations Tarim Basin (Xinjiang Uygur Autonomous Region, China) has revealed a diverse mongolepidid sinacanthid fauna dominated by mongolepids sinacanthids in association with abundant dermoskeletal elements endemic 'armoured' agnathans known as galeaspids....
ABSTRACT This study identifies three new neoselachian tooth taxa from the Middle and Upper Triassic. On basis of morphological histological characters, Rhomaleodus budurovi, nov. gen. et sp. (Anisian Bulgaria), is resolved as stem selachimorph, with an additional specimen same stratigraphic level assigned to Synechodus Selachimorph grade enameloid microstructural organization (crystalline bundles) was also identified during examination dental tissues "Polyacrodus" holwellensis (Rhaetian...
Chondrichthyan-like scales with simple, single-odontode crowns, reminiscent of those euselachians, have been reported from Silurian strata in a number previous studies. These specimens comprise the genera Elegestolepis (from Siberia, Mongolia, and Tuva) Kannathalepis Canadian Arctic) considered to exhibit contrasting patterns ontogenetic development. A study elegestolepid microremains Chargat Formation Mongolia (Llandovery–lower Wenlock) Baital Tuva (Wenlock–Ludlow) has undertaken using...
ABSTRACT Based upon fragmentary remains of dermal armor, a new form arandaspid fish, Ritchieichthys nibili, gen et. sp. nov., is described from subsurface core material the Katian (Late Ordovician) Nibil Formation Canning Basin, Western Australia. nibili represents first documented record fish Ordovician Basin. Allied to previous descriptions arandaspsids Amadeus and Warburton basins Northern Territory New South Wales, respectively, this extends paleogeographic range arandaspids across...
The triple-layered enameloid organization of neoselachian teeth has proven to be a reliable systematic character the group. This study uses scanning electron microscopy investigate orientation parallel bundles in area serrated cutting edges certain fossil elasmobranchs. examined come from two Upper Cretaceous Squalicorax species and Miocene carcharhiniforms Galeocerdo sp., Carcharhinus Hemipristis serra. are revealed by surface etching, which removes superficial shiny-layered enameloid. In...
Early chondrichthyans (cartilaginous fishes) possess a rich record of scale fossils that have impacted on taxonomic and phylogenetic studies early jawed vertebrates, but the significance these scales remains elusive due to lack well-defined characters. Gualepis, scale-based genus from Lower Devonian Yunnan, China, was initially recognized as an chondrichthyan uncertain affinity. We investigate new material Gualepis elegans type locality. By combining microtomographic data with morphological...
Abstract Microstructural scanning electron microscope investigation was performed on sectioned and surface‐etched isolated, prehensile teeth of the Late Triassic semionotiform species Sargodon tomicus Pycnodontidae incertae sedis from Cretaceous. The both taxa display a system vascular canals penetrating dentine overlying hypermineralized acrodin cap; small tubules are radiating at an angle to long axis canals, interpreted as residual spaces left by odontoblast cell processes. This is first...
Based initially on microfossils, Nostolepis is one of the first known ‘acanthodians’, which constitute a paraphyletic assemblage plesiomorphic members total group Chondrichthyes. Its wide distribution has potential implications for stratigraphic comparisons worldwide. Six species have been reported in China, including from Xitun Formation (Lochkovian, Lower Devonian) Qujing, eastern Yunnan. Acid preparation rock samples yielded abundant acanthodian remains. both morphological and...
The paper proposes a different approach to data modeling. Analogous the rejection method, where misclassifications are removed and manually evaluated, we focus here on difficult distinguish cases for binary classification. Such further explored information granulation is conducted based idea stretch out interesting intervals. This refinement model adopts concept from database theory nxn relations resolved through additional internal attribute connections. We introduce an integration of...