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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
This is a reconstruction of the late Triassic coelacanth, Diplurus newarki. Reworked by me. (reverse black and white) FROM: FOSSILS AND FACIES OF THE CONNECTICUT VALLEY LOWLAND: ECOSYSTEM STRUCTURE AND SEDIMENTARY DYNAMICS ALONG THE FOOTWALL MARGIN OF AN ACTIVE RIFT. Peter M. LeTourneau1,4, Nicholas G. McDonald2, Paul E. Olsen3,4,*, Timothy C. Ku5, and Patrick R. Getty Available HERE.- 1 comment
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Diplurus newarki - partial coelacanth Late Triassic, Newark Supergroup, Newark Basin, Lockatong Formation, North Bergen, NJ, old Granton Quarry G-3 layer.- 8 comments
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
2 skulls of the Late Triassic coelacanth, Diplurus newarki. The larger of the two shows the front half of the fish, overlapping the body of a smaller coelacanth's body. from the Late Triassic, Lockatong Formation. Newark Basin, Newark Supergroup. Old Granton Quarry, North Bergen, NJ. The two fishes outlined in red: -
From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Skull of Diplurus newarki coelacanth. Late Triassic, Newark Supergroup, Newark Basin, Lockatong Formation North Bergen, NJ. "Granton Quarry"© 2017 Tim Jones
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Late Triassic coelacanth, Diplurus newarki. Newark Supergroup, Newark Basin, Lockatong Formation, North Bergen NJ. Collected on 2/19/2017© 2017 Tim Jones
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Fossildude19, JefferyP, fossilsofnj and I went to Granton Quarry in North Bergen NJ to collect in the Lockatong Fm for Triassic fish. We had a great time and we all found some interesting specimens to add to our collections While the others were hard at work I came across a rather interesting flatten oval shaped sediment between two layers of the black shale in a small area I was working and at first I really didn't pay to much attention to it until one of them broke apart and I noticed that they seemed to be filled with tiny fish bones. I took the sections of slabs home and two days later took them to the NJSM to have someone look at them and one gentlemen told me that they maybe coprolites....interesting. As I was cleaning them up one of the other oval's flaked off exposing a fish tail and I was also able to expose another one without breaking apart. As you can see the two right section of slabs go on top of each other and the one to the far left slides into the middle slab. No 1 you can see a fish tale and No 1a was laying right next to it but don't seem to be a extension to the tail section when I slit this section apart in the field No 1a became exposed while No 1 remained intact until I got it home... No 1b are the pieces that cover No 1 and No 2 I also exposed without it breaking apart I'm going to leave these as is and when it dries out I will cover it with some type of stabilizer. In the second picture I have another fish that don't have the head attached. When I exposed it ,,it did appear to have the same matrix covering the specimen. Now the funny part about all this is that I never had come across this before while search for fish in this layer. Any Insight would be greatly appreciated.
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Taxonomy from Fossilworks.org. Diagnosis from Lund & Lund 1984, p. 239: " Marine rhabdodermatids having large dentary, precoronoid and ectopterygoid teeth. The preorbital region is higher and more rounded than in other rhabdodermatids, the cheek bones deeply overlap each other and the operculum. The operculum articulates with the tabular and the posterior margin of the tabular is level with the posterior margin of the skull. Tubercular ornamentation is sparse on the anterior skull-roof and preorbital region, dense on the very thin cheek bones of large individuals. Dense vermiform ornamentation is found on operculum and angular behind the angular pit line; sparse linear ridges on skull-roof posterior to intracranial joint. The first dorsal fin plate has ventral processes indicating fusion from supraneural elements. The second dorsal fin is anteroposteriorly elongated and bears a posterior articulation for the fin axis, and the anal plate, which rarely ossifies, is a simple rod in the ventral body wall, anterior to the first hemal spine. Pelvic plates are very broad anteriorly, with 3 major and one minor anterior lateral process. The size ranges from 79 mm to 219 mm in standard length. Elliptical caudal fin and cylindrical body form." Line drawing from Lund & Lund 1984, p 239: Identified by oilshale using Lund & Lund 1984. References: Lund, R., Lund, W. (1984) New genera and species of coelacanths from the Bear Gulch Limestone (Lower Carboniferous) of Montana (USA). Geobios, 17, fasc 2:237-244. Lund, R., Lund, W. (1985) Coelacanths from the Bear Gulch Limestone (Namurian) of Montana and the evolution of the Coelacanthiformes. Bull. Carnegie Mus. Nat. Hist. 25, pp 1-74. Link: Fossil Fishes of Bear Gulch
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Dear Guys, I have found many strange scales with radial incisions but I do not know which kind of fish they belong to. The age of the continental limestone boulders with these scales should be Triassic. Might they belong to coelacanths? Any idea what is this? Kind regards Domas
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Allenypterus montanus was first described by Melton as a Dorypterid; in 1977 this fish was recognized by Lund as a Coelacanth. Taken from "Fossil Fishes of Bear Gulch" by Lund, Richard, and Grogan, E.D., 2005, Bear Gulch web site, www.sju.edu/research/bear_gulch, 1/11/2016 (last update from 2/1/2006): Allenypterus montanus is a coelacanth of relatively primitive skull osteology but with a unique, teardrop-shaped body form. They range in size from about 25 mm (1 inch) to 150 mm (6 1/4 inches) in length. Like other coelacanths, Allenypterus had a complete covering of thin, rounded, overlapping scales, and webbed fins with few, widely spaced rays. No teeth, thick lips, and a very small gape of the mouth show that this fish was a suction feeder on small prey. The body is very high relative to length. The paired fins are large with delicate webbing. The paired fins, second dorsal and anal fins are supported on long muscular lobes by segmental bony axes that are covered with fine rounded scales. There is a long, continuous dorsal lobe of the webbed caudal fin. The combination of all these fins, webs, and lobes indicates a superb maneuverer in weedy, sheltered environments but a fish that could not outswim any predator. It is noteworthy that the belly was armored, suggesting that Allenypterus may have swam and fed on and close to the bottom. The body form of Allenypterus is unique among known coelacanths — all others differ subtly only in proportions. The skull of Allenypterus is among the most primitive coelacanth skulls known. Line drawing from Lund & Lund 1985, p.242: References: Melton, W. G. 1969. A new dorypterid fish from central Montana. Northwest Science 43:196-206 Glickman W. L. 1977: Allenypterus montanus (Crossopterygii: Coelacanthiformes) from the Bear Gulch Limestone of Montana. Adelphy University, 1977. Lund, R. & Lund, W. 1984: New genera and species of coelacanths from the Bear Gulch Limestone (Lower Carboniferous) of Montana (U.S.A.) Geobios, Volume 17, issue 2, p. 237-244. Lund, R., and W.L. Lund, 1985. "Coelacanths from the Bear Gulch Limestone (Namurian) of Montana and the evolution of the Coelacanthiformes." Bull. Carnegie Mus. Nat. Hist. 25: 1-74. Lund, W. L., R. Lund and G. Klein, 1985. "Coelacanth feeding mechanisms and the ecology of the Bear Gulch coelacanths." Compte Rendu, Neuvième Congrès International de Stratigraphie et de Géologie du Carbonifère, 5: 492-500. Friedman, M. & Coates, M. 2006: A newly recognized fossil coelacanth highlights the early morphological diversification of the clade Proc. R. Soc. B (2006) 273, 245–250. Hagadorn, J.: Bear Gulch: An Exceptional Upper Carboniferous Plattenkalk
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Taxonomy from Fossilworks.org. Diagnosis for Whiteia woodwardi from Moy-Thomas 1935, p. 215: "Medium sized or small slender Coelacanths. Head relatively large. Skull with triangular operculars and preoperculars, quadrato-jugals, squamosals, postorbitals, lacrimo-jugals, supra- temporals, parietals, five extra scapular (post-parietal) plates and the angular ornamented with numerous tubercles. The coronoids are dumb-bell shaped and unornamented. The dermosphenotics (post frontals) are separate from the frontals, and the supraorbital series are pierced by large lateral line pores. Circumorbital ring well developed. Parasphenoid rather broad. Pterygoids with wide anterior limb and apparantly no notch in their dorsal margin. All the lepidotrichia of the anterior dorsal fin, and at least the most anterior of the dorsal and ventral lobes of the caudal fin ornamented with two rows of denticles. Pelvic fins situated behind the anterior dorsal fin about half-way between the two dorsal fins. Anal fin behind the posterior dorsal fin. Scales ornamented with tubercles, elongated tubercles, short ridges, or ridges stretching the whole length of the exposed area of the scales. This ornament runs approximately antero-posteriorly." References: Moy-Thomas, J. A. (1935) The coelacanth fishes from Madagascar. Geological magazine 72:213-226. Woodward, A.S. (1910) On some Permo-Carboniferous Fishes from Madagascar. Ann. Mag. Natur. Hist., ser. 8, 5: 1-6. Beltan, L. (1980a) Eotrias du Nord-Ouest de Madagascar: Etude de quelques poissons, don’t un est en parturition. Ann Soc. Geol. Nord, 99: 453-464; Lille.
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Taxonomy from Fossilworks.com. Diagnosis from Wen et al. 2013, p. 178: "Middle−sized coelacanth. Three diagnostic features are the expanded lachrymojugal, the notched dentary, the large semicircular coronoid, Skull roof has two pairs of parietals. Posterior margin of postparietals embayed. Lachrymojugal has an expanded posterior portion and a concave posteroventral margin. Squamosal has a slightly anterior expansion. Ventral surface of parasphenoid is covered by numerous granular teeth. Dentary has a deeply notched posterior border, and teeth distributed on the separated dentary plate. The first dorsal fin contains 12 robust segmented rays. The lower lobe of the caudal fin is larger than the upper lobe. The following combination of characters, a notched dentary and an expanded lachrymojugal, is not known in any other actinistian, so the Luoping materials must represent a new taxon." Line drawing from Wen et al., p. 183: Identified by oilshale. References: Wen, W. et al. (2013): Coelacanths from the Middle Triassic Luoping Biota, Yunnan, South China, with the earliest evidence of ovoviviparity. Acta Palaeontologica Polonica 58 (1): 175–193. Geng, B., Zhu, M. und Jin, F. (2009): A Revision and Phylogenetic Analysis of Guizhoucoelacanthus (Sarcopterygii, Actinistia) from the Triassic of China. Vertebrata PalAsiatica, 2009, Vol 47, 3, pp. 165-177.
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Taxonomy from Fossilworks.org. Diagnosis from Schaumberg 1978, p.195 (translated from German by oilshale): "Medium to large coelacanthid; moderately slender; head one-fifth of total body length. Endocranium partially ossified in anterior part, well ossified in middle part; basisphenoid with strong processus antoticus; no processus basipterygoidus; basal process of basisphenoid distinctly set off; pleurosphenoids present; ossifications on otico-occipital seem to be absent; parasphenoid broadened in its posterior part; separate vomeres not detectable. Posttemporalia and at least 5 extrascapularia developed; parieto-intertemporalia extend to extrascapularia, they are firmly attached to supratemporalia; parieto-intertemporalia not inseparably fused; frontal and dermosphenoticum form uniform bone stiick; both fronto-dermosphenotica not firmly fused; rostro-nasal zone yon numerous, mostly oval bone plates filled (3 pairs of nasalia, several rostralia resp. postrostralia; rearmost closes "fontanella" between nasalia; lateral boundary by stout laterorostralia and elongate tectal plates). Antorbitals absent; postorbitals weakly developed; squamosum and praeoperculum reduced to narrow ossifications around praeopercular sensory canal; small quadrato-jugal above median pterygoid bulge; operculum large and triangular; pterygoid with long, low, anterior limb and broad, vertical limb; maxillary dentition with pointed conical teeth on 6 praemaxillaries, on dermopalatinum and ectopterygoid, there also dental granulation. Large, posterior, nearly triangular coronoid clamped between praearticulate and angular, its exposed part appearing quadrangular; anterior, low coronoid with strong, conical teeth; other, small coronoids presumably between dentary and praearticular, concealed yon tooth-bearing, granulated dentary plates; upper margin of praearticular set with dense denticles; articular with two articulating pits for quadratum and symplecticum; pronounced processus retroarticularis. Gular plates with elongated median apex; urohyals, ceratohyals, hyomandibulars, ceratobranchialia (probably 4 pairs), and symplecticum present. Shoulder girdle composed of clavicle, cleithrum, separate extracleithrum, anocleithrum, supracleithrum; pectoral fin attached slightly below middle of body flank; pelvic girdle composed of narrow bony ridges widened like plates at distal end; ventral fins opposite to space between basal plates of both dorsalia; Basal plate of anterior dorsal fin oval to triangular; basal plate of posterior dorsal fin smaller, with forked projections directed anteriorly, traces of ossification in segmented fin shaft; basal plate of anal fin small and narrow; caudal fin with axial lobes; fin rays of all fins distally clearly articulated. Large, ossified swim bladder between scapular girdle and anal fin, at level of ventral fins is constricted in a muscular manner. Scales large and thin, longer than high; their klelner, exposed part covered with numerous, longitudinally directed tubercles." The diagnosis of the species corresponds to that of the genus. Line drawing from Schaumberg 1978, p. 178: References: L. Agassiz (1843) Recherches Sur Les Poissons Fossiles. Tome I (livr. 18). Imprimerie de Petitpierre, Neuchatel xxxii-188. Schaumberg, G. (1978) Neubeschreibung von Coelacanthus granulatus Agassiz (Actinistia, Pisces) aus dem Kupferschiefer von Richelsdorf (Perm, W.-Deutschland). Paläontol. Z. 52, 169.. https://doi.org/10.1007/BF02987700. H.-P. Schultze (2004) Mesozoic sarcopterygians. Mesozoic Fishes 3 - Systematics, Paleoenvironments and Biodiversity 463-492. C. G. Diedrich (2009) A coelacanthid-rich site at Hasbergen (NW Germany): taphonomy and palaeoenvironment of a first systematic excavation in the Kupferschiefer (Upper Permian, Lopingian). Palaeobiodiversity and Palaeoenvironments 89:67-94.
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Diplurus newarki Skull and first dorsal fin. Late Triassic Lockatong Formation North Bergen, New Jersey. Granton Quarry© © 2016 Tim Jones
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Another skull of the Late Triassic coelacanth, Diplurus newarki. The eye orbit, operculum, and lower jaw are clearly visible. Note the imprint of a conchostrachan, Estheria ovata, on the lower jaw, as well as the presence of some ostracods, Darwinula sp., to the right of the skull. Late Triassic Lockatong Formation North Bergen, New Jersey. Found on 3-21-2016 As always, right click the photo, and select "Large" for best viewing.© © 2016 Tim Jones
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
A small plate with two skulls of the coelacanth, Diplurus newarki. The one on the bottom shows oblique dorso-ventral crushing. Late Triassic, Lockatong Formation, North Bergen, NJ,© © 2016 Tim Jones
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
A colorful skull of an unidentified fish, from the Late Triassic Lockatong Formation, Newark Supergroup. North Bergen, New Jersey.© © 2016 Tim Jones
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Front half of the Late Triassic coelacanth, Diplurus newarki. The first dorsal fin and the skull are present, along with some ribs. Late Triassic, (Rhaetian). Lockatong Formation, Newark Supergroup, North Bergen, NJ.© © 2016 Tim Jones
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Bones of a partial late Triassic coelacanth, Diplurus newarki. These layers are extremely hard to split. However, these layers (partially metamorphosed?) also preserve bones and scales very well, either in white or blue. (The blue is indicative of de-phosphatization.) The first and second dorsal fin bones are just visible -still partially covered at the top of the fossil. Also visible are the partially disarticulated Y-shaped vertebral bones (veterbral processes?) Note also the blue scales. Late Triassic, (Rhaetian). Lockatong Formation, Newark Supergroup, North Bergen, NJ. AS ALWAYS - RIGHT CLICK AND SELECT LARGE FOR BEST VIEWING© © 2016 Tim Jones
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
A faint body imprint of the Triassic coelacanth, Diplurus newarki. This shows how difficult these fossils can be to see in the field, and even at home. Late Triassic (Rhaetian) Lockatong formation, North Bergen, New Jersey. AS ALWAYS - RIGHT CLICK AND SELECT LARGE FOR BEST VIEWING© © 2015 Tim Jones
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Diplurus newarki coelacanth, The skull is present, if poorly preserved, as is the 1st dorsal fin. Late Triassic, Lockatong formation, Newark Supergroup North Bergen, New Jersey.© © 2015 Tim Jones
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From the album: Triassic
Diplurus newarki (coelacanth-tail fin and body) Late Triassic Lockatong Formation Newark Supergroup Granton Quarry North Bergen, N.J. collected 3/30/15 -
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Partial tail fin and small body portion of Jurassic coelacanth
Jeffrey P posted a gallery image in Member Collections
From the album: Jurassic fossils from the Newark Supergroup
Diplurus longicaudatus (coelacanth-partial tail fin and small body portion) Lower Jurassic Shuttle Meadow Formation Newark Supergroup Durham, CT. This fish may have been up to three feet long complete Collected in the company of Tim Jones (11/13) -
From the album: Triassic
Osteopleurus newarki (coelacanth) Late Triassic Lockatong Formation Newark Supergroup Granton Quarry North Bergen, NJ First coelacanth fossil I found at Granton- Thanksgiving Day 2013. Ended up with a wicked case of poison ivy, but that didn't stop me from going back. -
From the album: Triassic
Osteopleurus newarki (Coelacanth-partial) Late Triassic Lockatong Formation Newark Supergroup Granton Quarry North Bergen, NJ -
From the album: Triassic
Osteopleurus newarki (Coelacanth) Late Triassic Lockatong Formation Newark Supergroup Granton Quarry North Bergen, NJ
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