Austrohinnites trailli (Hutton, 1873)
HUTTON, F. W. 1873. Catalogue of the Tertiary Mollusca and Echinodermata of New Zealand, in the collection of the Colonial Museum. Wellington, Government Printer, for Colonial Museum and Geological Survey Dept. xvi + 48 p. [p. 32]
1873 Hinnites trailli Hutton, 1873
1924 Chlamys oamarutica Murdoch, 1924
1924 Chlamys oamarutica Murdoch, 1924
Hinnites trailli Hutton, holotype; R. S. Allan, 1946, Hinnites (Pectinidae, Mollusca) from Tertiary strata, New Zealand, plate 25, figures 1, 2.
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«Solid; irregularly ovate (sub-orbicular when young); obscurely radiately ribbed, and irregularly concentrically folded and striated; hinge straight, edentulous; cartilage pit deep, elongated, curving backwards; ears sub-equal, transversely striated; adductor impression large, orbicular, strongly marked. Height, 3·4 ; length, 3·1.
Localities.— Awamoa.» FREDERICK WOLLASTON HUTTON, 1873
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«Altonian; Mount Harris Formation, Awamoa (type locality of H. trailli); Target Gully Shellbed (type locality of C. oamarutica); Old Rifle Butts, Cape Wanbrow; basal shellbed, Enys Formation, junction of Porter and Thomas Rivers, Castle Hill Basin. Rare or uncommon at all localities.
"Hinnites" marwicki (Lillburnian-Waiauan), the only other'species of the genus so far described from New Zealand, differs in having far fewer (only 20) costae on the ostreiform stage. The earliest local record of the genus is from the Kaiatan or Runangan of Nelson; other records are from the Duntroonian or Waitakian Cookson Volcanics in North Canterbury, from the Chatton Formation, Mataura River, Southland (Waitakian) and from the Otekaike Limestone near Duntroon, North Otago (Waitakian). Hinnites has long been assumed to be a "form genus", i.e. a polyphyletic group in which have been included several different Chlamys-like species that have independently evolved a cemented habit. This being so, it is unlikely that the New Zealand species - which may constitute a monophyletic group - are closely related to the type species of Hinnites, H. crispa (Brocchi, 1814) (Pliocene, Italy). On the other hand they do not seem to be related to the western North American species H. giganteus (Gray, 1825), type species of Crassadoma Bernard, 1986 (Bernard 1986, p. 73). H. trailli and H. marwicki have a very distinctive microsculpture which should give some clue as to their origin; in this context, it may be significant that a similar type of microsculpture is present in the Late Paleocene pecten Chlamys mercuria (PI. 4e, f). The common southern Australian Miocene species Hinnites corioensis McCoy, 1879 has similar microsculpture to that of the New Zealand species, and seems likely to belong in the same monophyletic group. Figured specimen (PI. 17a, b): holotype of Hinnites trailli, Awamoa, Oamaru (probably mouth of Awamoa Creek), Altonian (TM2846, NZGS) x 1.» BEU, A. G. & P. A. MAXWELL. 1990. Cenozoic
Mollusca of New Zealand. New Zealand Geological Survey Paleontological
Bulletin, 58: 1-518, pls. 1- 57. [p. 179]
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"Hinnites" trailli Hutton; A. G. Beu & P. A. Maxwell, 1990, Cenozoic
Mollusca of New Zealand, plate 17, figures a, b.
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«HOLOTYPE (TM 2846), a left valve.
TYPE LOCALITY: Awamoa. Age, Awamoan (Upper Oligocene).
ORIGINAL DESCRIPTION: "Solid; irregularly ovate (sub-orbicular when young); obscurely radiately ribbed, and irregularly concentrically folded and striated; hinge straight, edentulous; cartilage pit deep, elongated, curving backwards; ears sub-equal, transversely striated; adductor impression large, orbicular, strongly marked. Height, 3.4; length, 3.1."
REMARKS: Allan (1946) redescribed and figured the holotype of H. trailli and separated a second New Zealand species of Hinnites, H. marwicki (1946, p. 127, pI. 26, fig. 1, 2), distinguished from H. trailli chiefly by the coarser and more prominent ribbing on the pectinoid part of the shell.
Hinnites trailli has been recorded from Awamoa and Target Gully (age, Awamoan) and from the shellbed at the junction of the Porter and Thomas River, Trelissic Basin (GS 237; age, probably Awamoan or lower Southland Series). H. marwicki was described from the Hinnites Shellbed, Weka Pass (Waiauan), and is also recorded from Clifden, Band 7a (Lillburnian). Hinnites is first known in New Zealand from the Eocene (? Kaiatan, GS 7266, Nelson), and last from the Waiauan (Middle Miocene).» BOREHAM, A. U. E. 1965. A revision of F. W. Hutton's pelecypod species described in the Catalogue of Tertiary Mollusca and Echinodermata. New Zealand Geological Survey Paleontological Bulletin, 37: 1-125, pls. 1-20. [p. 36]
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Hinnites traiIli (Hutton); A. U. E. Boreham, 1965, A revision of F. W. Hutton's pelecypod species described in the Catalogue of Tertiary Mollusca and Echinodermata, plate 11, figure 1, holotype, a left valve (TM 2846).
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