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Heimdallia
''Heimdallia'' is an ichnogenus comprising a strange planar trace that does not have a circular cross-section; its maker may have been fed upon by ''Beaconella ''Beaconella'' is an ichnogenus comprising a wide trace thought to be constructed by a burrowing arthropod Arthropods (, (gen. ποδός)) are invertebrate animals with an exoskeleton, a segmented body, and paired jointed appendages. Art ...''. The trace was probably made by a small crustacean. References Arthropod trace fossils {{trace-fossil-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Margaret Bradshaw
Margaret Ann Bradshaw (née Cresswell; born 31 December 1941) is a New Zealand geologist and a retired staff member at the University of Canterbury. She is considered a trailblazer and influential female role model in Antarctic research. Early life and education Born Margaret Ann Cresswell in Nottingham, England, on 31 December 1941, she married John Dudley Bradshaw in Nottingham in 1963, and they moved to Christchurch, New Zealand, in 1966. Bradshaw began her work there on Devonian invertebrate palaeontology, gradually incorporating Antarctica into her research. She became a naturalised New Zealand citizen in 1980. Career and impact Bradshaw focused her research on the structure and stratigraphy of Devonian rocks in New Zealand and Antarctica. Specifically she worked on the development and relationship of Paleozoic terrains in New Zealand, as well as the Biogeography, paleobiogeography of Devonian Bivalvia, Bivalves and the Paleontology and environmental significance of P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ichnogenus
An ichnotaxon (plural ichnotaxa) is "a taxon based on the fossilized work of an organism", i.e. the non-human equivalent of an artifact. ''Ichnotaxa'' comes from the Greek ίχνος, ''ichnos'' meaning ''track'' and ταξις, ''taxis'' meaning ''ordering''.Definition o'ichno'at dictionary.com. Ichnotaxa are names used to identify and distinguish morphologically distinctive ichnofossils, more commonly known as trace fossils. They are assigned genus and species ranks by ichnologists, much like organisms in Linnaean taxonomy. These are known as ichnogenera and ichnospecies, respectively. "Ichnogenus" and "ichnospecies" are commonly abbreviated as "igen." and "isp.". The binomial names of ichnospecies and their genera are to be written in italics. Most researchers classify trace fossils only as far as the ichnogenus rank, based upon trace fossils that resemble each other in morphology but have subtle differences. Some authors have constructed detailed hierarchies up to ichnosupe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beaconella
''Beaconella'' is an ichnogenus comprising a wide trace thought to be constructed by a burrowing arthropod Arthropods (, (gen. ποδός)) are invertebrate animals with an exoskeleton, a segmented body, and paired jointed appendages. Arthropods form the phylum Arthropoda. They are distinguished by their jointed limbs and cuticle made of chiti ... ploughing through the sediment for food, leaving a mound of piled sediment at the end of each trace. See also * '' Beaconites'' References Burrow fossils {{Trace-fossil-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustacean
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans (Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
