Conchostracan Trails in Bottom Clay Muds and on Turbid Water Surfaces

Tasch, Paul

doi:10.2307/3626685

Cited by 15 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The horizontal traces reported by Stollhofen et al . () occur on surfaces distinct from those of the body fossils, but are consistent with both spinicaudatan and ostracod surface crawling trails (compare Tasch ; Retrum et al . ).…”

Section: Geological Settingsupporting

confidence: 61%

Evidence for a dioecious mating system in Early Jurassic Hardapestheria maxwelli gen. et sp. nov. (Crustacea, Branchiopoda, Spinicaudata) from the Kalkrand Formation of Namibia

et al. 2013

View full text Add to dashboard Cite

A new spinicaudatan (clam shrimp), Hardapestheria maxwelli gen. et sp. nov., is described from the Jurassic Kalkrand Formation of central Namibia. Specimens were collected from a sedimentary interbed within a succession of flood basalts. These are the first spinicaudatans to be described from the Jurassic of south-western Africa. The new taxon is assigned to the family Eosestheriidae based on the combination of punctae and radial ornamentation on the carapace. Ornamentation on the growth bands in H. maxwelli differs from other eosestheriid genera because the punctate ornamentation is not restricted to the dorsal region of the carapace. Instead, all growth bands include a proximal region with punctae even though the distal portion of each growth band may exhibit anastomosing lirae. Among well-documented Mesozoic spinicaudatan genera, Hardapestheria is most closely related to Carapacestheria from the contemporaneous Kirkpatrick Basalt of Antarctica and Yanjiestheria from the Early Cretaceous of China. Hardapestheria maxwelli displays sexual dimorphism, which can be definitively related to a dioecious mating system with discrete male and female individuals. Review of additional early members of the Eosestheriidae suggests that the maintenance of two discrete sexes was the ancestral state for the clade. The ability to discriminate sexual mating system type unambiguously is rare in fossils, and this new species sheds light on the relationship between environmental stability and mating system evolution.

show abstract

Section: Geological Settingsupporting

confidence: 61%

Evidence for a dioecious mating system in Early Jurassic Hardapestheria maxwelli gen. et sp. nov. (Crustacea, Branchiopoda, Spinicaudata) from the Kalkrand Formation of Namibia

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Detailed descriptions of invertebrate trace fossil assemblages by subfacies from nonmarine deposits are rare (e.g., Bromley and Asgaard, 1979;Bown, 1982;Bown and Kraus, 1983;Pollard, 1988); only casual remarks referring to 'bioturbation features' or 'burrows' can be found in most works describing nonmarine deposits (Tevesz and McCall, 1982). Also, the number of studies of recent animal-sediment interactions, and matching of particular invertebrates to specific traces in continental deposits, is limited (Tasch, 1964;Smith and Hein, 1971;Chamberlain, 1975;Muller, 1975;Wells, 1977;Ahlbrandt et al, 1978;Ratcliffe and Fagerstrom, 1980;Miller et al, 1981;Bown and Ratcliffe, 1988).…”

Section: Overviewmentioning

confidence: 95%

Ichnology of an ephemeral lacustrine/alluvial plain system: Jurassic East Berlin Formation, Hartford Basin, USA

Gierlowski‐Kordesch

1991

Ichnos

View full text Add to dashboard Cite

“…Conchostracan (Tasch, 1964) Crozier-like burrow consisting of one partial whorl (Fig. 9G) Pascichnia Bivalve (Lawfield and Pickerill, 2006) Isolated traces with elongate central region and radiating imprints (Fig.…”

Section: Facies Association 1 (Fa 1): Fluvial Channel Systems -Aggregmentioning

confidence: 99%

Mid-Carboniferous diversification of continental ecosystems inferred from trace fossil suites in the Tynemouth Creek Formation of New Brunswick, Canada

Falcon-Lang

Minter

Bashforth

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

View full text Add to dashboard Cite

We report Skolithos, Scoyenia and Mermia Ichnofacies from sub-humid tropical fluvial megafan deposits in the Lower Pennsylvanian Tynemouth Creek Formation of New Brunswick, Canada, and discuss their evolutionary and palaeoecological implications, especially regarding the colonization of continental freshwater/terrestrial environments. The Skolithos Ichnofacies comprises annelid/arthropod spreite in the upper storey of a fluvial channel. The

show abstract

Conchostracan Trails in Bottom Clay Muds and on Turbid Water Surfaces

Cited by 15 publications

References 0 publications

Evidence for a dioecious mating system in Early Jurassic Hardapestheria maxwelli gen. et sp. nov. (Crustacea, Branchiopoda, Spinicaudata) from the Kalkrand Formation of Namibia

Evidence for a dioecious mating system in Early Jurassic Hardapestheria maxwelli gen. et sp. nov. (Crustacea, Branchiopoda, Spinicaudata) from the Kalkrand Formation of Namibia

Ichnology of an ephemeral lacustrine/alluvial plain system: Jurassic East Berlin Formation, Hartford Basin, USA

Mid-Carboniferous diversification of continental ecosystems inferred from trace fossil suites in the Tynemouth Creek Formation of New Brunswick, Canada

Contact Info

Product

Resources

About