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Looking for belemnite species - Jurassic (USA)
Fossilsforever posted a topic in Member-to-Member Fossil Trades
Hello all, As a belemnite collector, I am looking for the American Jurassic species Pachyteuthis densus (Meek & Hayden, 1858). Does someone have this species and is willing to trade some examples of this particular species? Kind regards, Ruben The Netherlands- 2 replies
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- belemnites
- jurassic
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Alternative combination: Pholidophorus americanus Taxonomy from Fossilworks.org. Diagnosis "A generalized halecostome neopterygian with the following combination of primitive and derived characters: braincase with persistent otico-occipital fissure; no supraoccipital; intercalar without membranous outgrowths; parasphenoid broad, toothed, with foramina for efferent pseudobranchial and internal carotid arteries; vomer median; nasals separated by rostral. Nasal processes of premaxillae simple, meeting in midline and occasionally fusing; maxilla free and mobile, extending beneath posterior part of orbit, no supramaxilla. Quadratojugal independent and splintlike. Interopercular present. Post-temporal (suprascapular) with internal process. Large, median basihyal toothplate; no gular. Vertebral column with separate neural arches and dorsal intercalaries throughout; separate ventral intercalaries present only in anterior part of caudal region; unpaired neural spines in posterior half of column. Dorsal and ventral chordal hemicentra meeting as annular chordacentra in mature individuals. No ossified ural/neural arches. At least seven epurals. Hypocaudal skeleton with five elongated preural haemal spines and at least eight unmodified hypurals. No clavicle. Scales rhomboidal, composed of enameloid and bony base; dentine absent. Basal and fringing fulcra on all fins." Line drawing from Schaeffer et al. 1984, p. 2796: Identified by oilshale References: C. R. Eastman (1899) Jurassic fishes from Black Hills of South Dakota. Geological Society America Bulletin 10:397-408. Schaeffer, B.. Patterson, C. (1984) Jurassic fishes from the western United States, with comments on Jurassic fish distribution. American Museum Novitates ; no. 2796, pp. 1-86, figs. 1-39, tables 1-4
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