A5038188470- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Marine Biology and Ecology Research
- Geological formations and processes
- Marine and environmental studies
- Geochemistry and Geologic Mapping
- Diatoms and Algae Research
- Quality and Supply Management
- Morphological variations and asymmetry
- Operations Management Techniques
- Cephalopods and Marine Biology
- Hydrology and Sediment Transport Processes
- Railway Systems and Materials Science
- Marine and coastal plant biology
- Isotope Analysis in Ecology
- Quality and Management Systems
- Leech Biology and Applications
- Fish Ecology and Management Studies
- Geological Studies and Exploration
- Paleontology and Evolutionary Biology
- Mollusks and Parasites Studies
- Methane Hydrates and Related Phenomena
Milwaukee Public Museum
2022-2024
Alibaba Group (China)
2023
Quality Systems (United States)
1993
Protichnites eremita from the Cambrian Elk Mound Group of Wisconsin is reinterpreted based on new material and trackway experiments. Two forms P. suggest that discrete medial imprints these traces could be produced by segmented postabdomen euthycarcinoids same deposit. Form 1 have been a pair traveling together, like in limulid amplexus, where both individuals made with their postabdomens. In this scenario, if one individual held its to left side, it possible produce left-handed shingling...
Recent discoveries of trackways and trails on ancient tidal flats at Blackberry Hill, Wisconsin, USA, have transformed our understanding the initial invasion land, 500 Ma. Huge slug‐like molluscs grazed microbial mats. Euthycarcinoid (stem myriapod) death traces (mortichnia) suggest that they did not come onto land to feed or breed, but simply survive; Moon was closer Earth then, massive tides stranded animals in pools gradually dried up.
Abstract An unusual worm, previously interpreted as the earliest leech, is described from early Silurian (Llandovery, Telychian) Brandon Bridge Formation Lagerstätte (Waukesha Biota) of Wisconsin (~437 Ma). Lacking preserved internal organs, it up to ~16 cm long, 8.2 mm wide, with ~250 annulations and a circular structure at one end, here broken end molt. It therefore referred Cycloneuralia incertae sedis .
Silurian (Llandovery–Ludlow) Encrinurinae from Wisconsin, Indiana, and Illinois include species of Balizoma Holloway, 1980, Curriella Lamont, 1978, Distyrax Lane, 1988, Encrinurus Emmrich, 1844, Mackenziurus Edgecombe Chatterton, 1990a, Nucleurus Ramsköld, 1986. lauriae n. sp. is described Wenlock strata the Racine Sugar Run Dolomites; nine segments in holaspid thorax are fewest known for any encrinurid. A square rostral plate diagnostic . New morphological data provided by specimens...
The Waukesha Biota (Brandon Bridge Formation Lagerstätte) is a diverse assemblage of early Silurian (437 Ma) shallow marine fossils from Wisconsin, USA. Their exceptional preservation, in finely laminated dolomitic mudstones, was mediated by tidally‐influenced conditions and/or microbial entombment. Shelly biomineralized animals are rare, but soft‐bodied organisms common. Arthropods dominate, including trilobites, phyllocarids, ostracodes, thylacocephalan, synziphosurine and various...
Abstract Palmichnium gallowayi (Sharpe, 1932) new combination from the Middle Ordovician Martinsburg Formation (proximal deltaic facies) of Rondout, near Kingston, New York State, is redescribed. It consists opposing series five tracks, outer two large and pear-shaped, inner three smaller elliptical, arranged in a chevron converging direction travel, on either side wide medial impression. attributed to medium-sized stylonurid eurypterid using decapodous gait, crawling onto shoreline,...
The trilobite fauna of the Attawapiskat Formation Ontario agrees with a late Llandoverian to early Wenlockian age assignment. This is closely related and faunas from eastern Iowa Greenland. numerically dominant trilobites this (illaenids, scutelluids, cheirurids) represent an association that typical Ordovician–Devonian carbonate buildups. These occur in localized accumulations formed by entrapment exuviae depressions or other similar structures.Perryus severnensis gen. et sp. nov....
Abstract A new dalmanitid trilobite is described from the early Silurian (Telychian) Waukesha Biota in Wisconsin, USA, best known for its variety of exceptionally preserved arthropods. Waukeshaaspis eatonae genus species most common found Biota, numbering ~200 specimens, allowing a thorough description dorsal exoskeleton. This taxon has combination characters unique to Dalmanitidae, including distinct embayment on posterior margin pygidium. Embayments are rare dalmanitids, having instead...
Abstract The Milwaukee Formation, a sequence of Givetian (Middle Devonian) marine strata deposited in what is now southeastern Wisconsin, USA, was recognized as preserving an exceptionally diverse biota invertebrates, placoderms, and plants, when local cement companies mined the rock for manufacture hydraulic from 1876 to 1911. It containing one North America's most biotas its age coming single formation, having roughly 250 species, 100 families, 16 phyla, four kingdoms. Intense collecting...
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The passing of Ronald Pearson Tripp marks the end career a great trilobite taxonomist and one last “gentleman geologists.” I had pleasure knowing him personally since 1973.
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The majority of the fossil taxa from late Givetian Milwaukee Formation have not been studied for over 100 years, yet a recent study suggests that it may represent one most diverse biotas its age in North America. Opportunities collecting new material are limited, but unstudied museum is plentiful. Studies by numerous 19th to early 21st century researchers described rich biota marine protists, invertebrates, fish, and trace fossils, along with unusual morphological features some taxa, common...
The passing of Ronald Pearson Tripp marks the end career a great trilobite taxonomist and one last “gentleman geologists.” I had pleasure knowing him personally since 1973.
Tripp et al. (1977, p. 862) briefly described a small encrinurine from the Silurian of Wisconsin and Illinois. They refrained naming this taxon, due to its being “as yet imperfectly known,” referring lack testiferous material, distortion abrasion most specimens, paucity known cephalic sclerites. Lateral compression only cranidium (Tripp al., 1997, pl. 114, figs. 8 9, Brookfield, Wisconsin) were severe, but large, sparse tubercles discernible. Gass (1992) established Mackenziurus lauriae...
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