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Mayrodus melchini

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Journal Article

Hirnantian (Ordovician) through Wenlock (Silurian) conodont biostratigraphy, bioevents, and integration with graptolite biozones, Cape Phillips Formation slope facies, Cornwallis Island, Canadian Arctic Islands

Shunxin Zhang, David M.S. Jowett, Christopher R. Barnes
Published: 08 August 2017
Canadian Journal of Earth Sciences (2017) 54 (9): 936–960.
DOI: https://doi.org/10.1139/cjes-2017-0023
..., including one new genus and species, Mayrodus melchini , plus an additional six indeterminate genera and species, as well as a suberectiform element ( Figs. 6–10 ; Tables S10–S18 2 ). The relatively modest abundance of specimens is mostly a function of the impure carbonates that commonly were only...
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Silurian conodonts. 1–5.Distomodus kentuckyensis (Branson and Branson) (×40 except 1 ×20 and 3 ×30); from CM2B-1; 1. upper view Pa element, GSC120573; 2, 5. inner lateral and upper anterior view of M element, GSC120574, GSC120577; 3. posterior view of Sa element, GSC120575; 4. lateral view of Sb element, GSC120576. 6–10.Distomodus staurognathoides (Walliser) (×35); all from ARE5 except 9 from ARE6; 6. lateral view of M element, GSC120578; 7. posterior-lateral view of Sa element, GSC120579; 8. posterior-lateral view of Sb element 580, GSC120; 9. outer lateral view of Sc element, GSC120581; 10. upper view of Pa element, GSC120582; 11, 12.Aulacognathus bullatus (Nicoll and Rexroad) (×55); from CP17; 11. upper view of Pa element, GSC120583; 12. Inner lateral view of Sb-c element, GSC120584. 13–15.Kockelella ortus absidata Barrick and Klapper (×40 except 15 ×30); from 3ARW12; 13. lateral view of M element, GSC120585; 14. posterior view of Sb element, GSC120586; 15. lateral view of Pa element, GSC120587. 16.Kockelella patula Walliser (×25); from 2ARW1; upper view of Pa element, GSC120588. 17–22.Kockelella ranuliformis (Walliser) (×65 except 22 ×60); 18, 20, 22 from CP47, 19 from CP51, 17, 21 from CP49A; 17. inner lateral view of Sc element, GSC120589; 18. posterior view of Sb element, GSC120590; 19. lateral view of Pb element, GSC120591; 20. posterior view of M element, GSC120592; 21. posterior view of Sa element, GSC120593; 22. lateral view of Pa element, GSC120594. 23, 24.Aulacognathus chapini (Savage) (×30); from ARE6; 23. upper view of Pa element, GSC120595; 24. lateral view of Pb element, GSC120596. 25–28.Kockelella sp. (×80); from CP25 except 26 from CP23; 25, 26. lateral view of Pa element, GSC120597, GSC120598; 27. posterior view of Sa element, GSC120599; 28. posterior view of Sb element, GSC120600. 29, 30.Astropentagnathus? sp. (×55); from CM2C-16; 29. inner lateral view of Sc element, GSC120601; 30. posterior view of Sa element, GSC120602. 31–35.Mayrodus melchini n. gen. et n. sp. (×115); from CP49A; 31–33. lateral view of conical element, GSC120603, GSC120604, GSC120605; 34. upper view of conical element, GSC120606; 35. lateral view of conical element with attached radiolarian, GSC120607. 36. gen. et sp. indet. 4 (×60); from ARE5; upper view of platform element, GSC120608. 37. “suberectiform element” (×100); from ARE1; lateral view, GSC120609. 38. gen. et sp. indet. 5 (×115); from CP27; lateral view of coniform element, GSC120610. 39. gen. et sp. indet. 1 (×55); from CP25; posterior view, GSC120611. 40. gen. et sp. indet. 2 (×110); from CP27; upper view of platform element, GSC120612. 41. gen. et sp. indet. 3 (×75); from ARE1; upper view of platform element, GSC120613. 42. gen. et sp. indet. 6 (×40); from ARE; inner lateral view, GSC120614.

Silurian conodonts. 1–5. Distomodus kentuckyensis (Branson and Branson) ...

Published: 08 August 2017
of Sa element, GSC120599; 28. posterior view of Sb element, GSC120600. 29, 30. Astropentagnathus ? sp. (×55); from CM2C-16; 29. inner lateral view of Sc element, GSC120601; 30. posterior view of Sa element, GSC120602. 31–35. Mayrodus melchini n. gen. et n. sp. (×115); from CP49A; 31–33. lateral