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Showing results for tags 'devonian'.
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Pteriomorpha bivalve from Madison County, New York
Jeffrey P posted a gallery image in Member Collections
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From the album: Middle Devonian
Paleoneilo emarginata (bivalve shell) Middle Devonian Moscow Formation Windom Shale Hamilton Group Deep Springs Road quarry Lebanon, N.Y. -
Paleotaxodonta Bivalve from Madison County, New York
Jeffrey P posted a gallery image in Member Collections
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From the album: Middle Devonian
Tellinopsis subemarginata (bivalve shell) Middle Devonian Moscow Formation Windom Shale Hamilton Group Deep Springs Road quarry Lebanon, N.Y. -
Pteriomorphia Bivalve from Madison County, New York
Jeffrey P posted a gallery image in Member Collections
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From the album: Middle Devonian
Mytilarca oviformis (bivalve shell) Middle Devonian Moscow Formation Windom Shale Hamilton Group Deep Springs Road quarry Lebanon, N.Y. -
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From the album: Middle Devonian
Spyroceras nuntium (straight-shelled nautiloid) Middle Devonian Moscow Formation Windom Shale Hamilton Group Deep Springs Road quarry Lebanon, N.Y. With an unidentified bryozoan attached- possibly Hederella canadensis.-
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- devonian
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I thought it would be cool to make a poster of my fossil of the month for March 2018. Markus took some great pics after he prepped it and I just took them and made this horizontal poster. I might put a heading on it or not. Let me know the one you like the most. Thanks Mikey
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From the album: Scabriscutellum furficerum Trilobite
S. furficerum trilobite eye through microscope. -
From the album: Scabriscutellum furficerum Trilobite
Middle Devonian Trilobite. Uncovering Location: Hamar Laghdad Formation, Ofaten, Morocco. Dimensions: 6.0 cm * 3.1 cm -
From the album: Scabriscutellum furficerum Trilobite
Middle Devonian Trilobite. Uncovering Location: Hamar Laghdad Formation, Ofaten, Morocco. Dimensions: 6.0 cm * 3.1 cm -
From the album: Scabriscutellum furficerum Trilobite
Middle Devonian Trilobite. Uncovering Location: Hamar Laghdad Formation, Ofaten, Morocco. Dimensions: 6.0 cm * 3.1 cm -
From the album: Scabriscutellum furficerum Trilobite
Middle Devonian Trilobite. Uncovering Location: Hamar Laghdad Formation, Ofaten, Morocco. Dimensions: 6.0 cm * 3.1 cm -
From the album: Scabriscutellum furficerum Trilobite
Middle Devonian Trilobite. Uncovering Location: Hamar Laghdad Formation, Ofaten, Morocco. Dimensions: 6.0 cm * 3.1 cm -
Taxonomy from Fossilworks.org. Description from Südkamp 2017, p. 147:" The small holothurian has a cylindrical form consisting of a distinct oral region with surrounding tentacles, and at the other end an elongate body that is rounded distally. The lobate arrangement of the 25 plated tentacles, the large ovate madreporite plate (perforated plate for entering of water), and the weakly developed calcareous ring are primitive features among the holothurians. The ossicles of the body wall are numerous small granules underlain by small plate-like elements. In the basal part thorn-like elements are more abundant." Identified by oilshale using Südkamp 2017. References: Lehmann, W. M. (1958). Eine Holothurie zusammen mit Palaenectria devonica und einem Brachiopoden in den unterdevonischen Dachschiefern des Hunsrücks durch Röntgenstrahlen entdect. Notizblatt des Hessischen Landesamtes für Bodenforschung 86, p 81-86. Südkamp, W. (2017) Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil, München.
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Last saturday my girlfriend and I went back to the south of Belgium to go hunt for my favorite fossils. On the way there we saw a new road under construction where cretaceous chalk was visible. We made a quick stop to chek it out, but we only found 2 bellemnite fragments. So we hit the road again to the devonian rocks. The weather was quite good for this time of the year, so it was no suprise to see some fellow fossil and mineral hunters on the site. Some new heaps on the side of the field got my attention. Here I made my first good find of the day. A goniatite anaptychus. I was missing this in my collection. So I was verry pleased with it. The rest of the morning most of the finds were made in situ by Natalie, 2 decent sized Manticoceras and 2 Carinoceras specimens. She also managed to find a trilobite fragment. Also the first trillo adition from this quarry to our collection. At noon we were joined on our hunt by a friend. We then got to the large dirt pile at the end of the quarry whera a few other people were looking for smal pyritised cephalopods. After a few chats with the other fossil hunters about the cephalopod fauna the showed me a huge Goniatite they found earlyer that day. I had rarely seen a specimen like this. My surprise was even greater when they offerd this specimen for my collection since I specialise in this kind of fossils. Again lots of thanks if that person reads this thread, it wil get well deserved attention and preparation. The rest of the day we spent on the large mound picking up various fossils but my find of the day here was a incredible crinoid calyx. The trip turned out to be one of my best on this location. Cheers. Manticocerasman I'll upload the photos in the next post
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From the album: Invertebrates
Bathericrinus hystrix (Bothryocrinus hystrix) Early Devonian Early Emsian Bundenbach Germany Length 22cm / 9"-
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From the album: Invertebrates
Medusaster rhenanus Stuertz, 1890 Lower Devonian Lower Emsian Bundenbach Germany -
From the album: Invertebrates
Hapalocrinus frechi Jaekel 1895 Middle Devonian Early Emsian Bundenbach Germany Length 6 cm / 2" -
From the album: Invertebrates
Hapalocrinus frechi Jaekel 1895 Middle Devonian Early Emsian Bundenbach Germany -
From the album: Invertebrates
Hapalocrinus frechi Jaekel, 1895 Lower Devonian Lower Emsian Bundenbach Germany -
Inspired by my friend, Darktooth, Dave and his recent exploits at Deep Springs Road quarry I decided due to a favorable weather report on Monday to visit my favorite site for the for first time in 2018. I woke up Monday morning to an inch of snow in the Hudson Valley. Headed north on the Thruway to Albany through more snow, then west, finally on Route 20. About hallway there, the sky cleared and the snow covering reduced to patches. After a three and a half hour trip I arrived at Deep Springs Road. True to Dave's word, the site was completely snow free. The temp was in the mid 40s, sunny and warm enough that later in the day I was removing my outerwear. Deep Springs Road quarry is the eastern most exposure of the Windom Shale, the Moscow Formation which lies at the top of the Hamilton Group- which is also the top of the Middle Devonian. It is the same formation exposed at Penn Dixie. What is notable about this site is the biodiversity- at least 20 species of brachiopods, more than 20 species of bivalves, at least 5 species of gastropods, plus cephalopods, trilobites, phyllocarids, plants, etc. Dave's recent excavation left me a lot of rock to split which took up most of my day. I did my own excavation as well. Here are some of my finds: My favorite find of the day- the largest Spyroceras nautiloid I've found at the site so far. A Cimitaria recurva, a bivalve in 3D. Pholadella radiate, another bivalve.
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I wanted to enter this one into the IVFOM, but I technically collected it the last day of March, and I didn't take a picture of it before I started prepping it, so that's out. But I will try to chronicle the prep on here. It’s a decent-sized Bellacartwrightia whiteleyi that I pulled from the Windom shale just above the Bay View Coral bed at the site.
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Taxonomy from Fossilworks.com Brauckmann et al. 2002, p. 215 claim that "Nahecaris is a subjective junior synonym of Dilophaspis as already suggested by HAHN (1990)." Description from Südkamp 2017, p. 83: "Nahecaris is the most common non-trilobite arthropod. The large bivalved shield (carapace) covers the head, thorax, and anterior segments of the abdomen. Dorsally, a short anterior rostral plate and a longer posterior median plate separate the valves. The carapace shape (deep and rounded or long and narrow) and the ornamentation (generally fine ridges parallel to the oral border) varies. A strengthened rim along the margin forms a doublure. The head bears a pair of large, club-shaped, stalked eyes, and two pairs of biramous antennae, the second much larger than the first. The thoracic segments each bear a pair of biramous slender limbs (thoracopods) that decrease in size posteriorly. Mostly, the endopods are curved downwards so that they form a cone-shaped feeding basket. The abdomen consists of seven cylindrical segments, of which only up to four are visible. The first five bear biramous limbs (pleopods) made up of flap-like branches. The seventh abdominal segment is twice to three times longer than the others. The abdomen terminates with a median telson spine, flanked by two much longer, and coarser, lateral furcal branches. The ornament of abdomen and telson is similar to that of the carapace." Line drawing from Broili, 1929, p. 256: References: Broili, F. (1929) Beobachtungen an neuen Arthropodenfunden aus den Hunsrückschiefern. Sitzungsber. d. b. Akad. d. Wissensch. mathem.-naturw. Abt. 253-280. Taf. Jan Bergström et al. (1987) Nahecaris stuertzi , a phyllocarid crustacean from the Lower Devonian Hunsrück Slate. Paläontologische Zeitschrift 61(3):273-298. DOI 10.1007/BF02985909 Brauckmann, C., Koch, L., Gröning, E. (2002) New evidence for the synonymy of Dilophaspis and Nahecaris (Phyllocarida; Lower Devonian; Rhenish Massif). Paläontologische Zeitschrift, 76 (2): 215-222, Abb. 1-6, Tab. 1. Südkamp, W. (2017) Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil, München.
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Rhinopteraspis dunensis Roemer, 1855 - a pteraspidid heterostracan agnathan
oilshale posted a gallery image in Member Collections
From the album: Vertebrates
Rhinopteraspis dunensis Roemer, 1855 Early Devonian Upper Pragian Odenspiel North Rhine-Westphalia Germany Length 10cm / 4" -
From the album: Invertebrates
Praecardium sp. Early Devonian Early Emsian Hunsrück Slate Group Kaub Formation Bundenbach Grube Eschenbach Germany Dia. 6cm -
Conularia bundenbachia RICHTER & RICHTER, 1930
oilshale posted a fossil in Jellyfish, Conulariids, etc.
References: María Consuelo Sendino Lara (2009) REVISIÓN DE LA COLECCIÓN DE CONULARIIDAE DE THE NATURAL HISTORY MUSEUM DE LONDRES. ISBN: 978-84-692-1118-2- 3 comments
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Synonyms of Urasterella asperula are Protasteracanthion primus and Roemeraster asperula. Taxonomy from Fossilworks.org. Description from Südkamp 2017, p. 127: "Urasterella is the most common asteroid in the Hunsrück Slate. The small disc is composed of a hexagonal central plate surrounded by five hexagonal radial plates, and a further ring of small plates. The small mouth is built of only triangular flat plates. The dorsal surface of the round narrow arms is composed of at least three rows of plates (radials, adradials and inferomarginals; the last were pushed upwards). All plates of the dorsal side bear paxillae with spines. The plates of the oral surface are arranged in two double-sided rows (ambulacrals ans adambulacrals). Mostly, only the large disc-shaped adambulacrals can be recognized, as the opposing subrectangular ambulacrals can only be seen by the wide-opened arm furrow. The adambulacrals bear a transverse ridge carrying long spines." Name derivation: Ur = old, Aster = star. Identified by oilshale. References: Roemer, C. F. (1864) Neue Asteriden und Crinoiden aus devonischem Dachschiefer von Bundenbach bei Birkenfeld. Palaeontographica 9:143-152 Südkamp, W. (2017) Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil. München 2017. ISBN978-3-89937-221-2.
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