Camptonectes grandis (Hector, 1886)
HECTOR, J. 1866. Outline of New Zealand Geology. Detailed catalogue and guide to geological exibits. New Zealand Court, Indian and Colonial Exhibition, London, 1886, 88 p., figs. 1-65. Government print, Wellington. [p. 70, fig. 36.1]
1886 Plagiostoma grandis Hector, 1886
«The general facies of the fauna is on the whole Liassic, although many Lower Oolite forms occur; but the Brachiopoda, of which twenty-one forms have been provisionally distinguished, again present the same abnormal survival of older types, especially in the occurrence of an Athyris-like, shell belonging to a new genus, Clavigera, which has a great development in the nex lower formation.
Our knowledge of this as a fossiliferous formation has until lately been confined to the Hokanui Range and the country between Gore and the sea-coast at the mouth of Catlin's River; but within the past two years it has been peoved present at Kawhia and in the Raglan district, Auckland.»
JAMES HECTOR, 1886
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«DISCUSSION: What is preserved seems identical with the more anterior aspect of C. grandis (Hector), but the present specimen was probably considerably larger, reaching an estimated maximum length of 15 cm compared with a maximum for C. grandis of about 10 cm (I. Speden, pers. comm.).
Weak Camptonectes sculpture is present consistently on both anterior and posterior parts of C. grandis. Poor preservation of the Antarctic specimen makes it impossible to know whether it is present or not. Another Bajocian form is C. waggrakinensis Skwarko from the Newmarracarra Limestone of Western Australia (Skwarko 1974, pI. 25, fig. 1, 4, 10) (Etheridge 1910). Size is comparable but the Antarctic specimen is distinctly prosocline. AGE: Middle-Late Bajocian.»
QUILTY, P. G. 1983. Bajocian bivalves from Ellsworth Land, Antarctica. New Zealand Journal of Geology and Geophysics, 26 (4): 395-418, figs. 1-60. [p. 404]
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Camptonectes aff. C. grandis (Hector); P. G. Quilty, 1983, Bajocian bivalves from Ellsworth Land, Antarctica, figures 17-19.
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«Neotypes.— N.Z. Geological Survey.
Length, 90 mm. est.; height, 83 mm.; inflation, B mm. A left valve, G.s. 3632, 104 x 104 x 14 mm. Localities.— G.S. 148, coast half mile north of Bloody Jacks Island (Tuhawaiki), Catlins dislrict (type). G.S. 471, east bank, Mataura River, 1 mile below bridge at Mataura. G.S. 3632,Jacks Bay, Catlins district, N. H. Taylor.
Satage.— Heterian ( Oxfordian) .
Hector's specific name is based on a rather crude woodcut, and possibly some confusion in labelling caused the combination of this figure with the genus Plagiostoma. For instance, the shell that gave its name to the " Plagiostoma beds " of the Bastion Series of Cox and McKay, and is now known as Otapiria marshalli, appears on the previous page of the Outline above the caption " Pholadomia." It may be that the labelling of the Outline figures was not checked by Hector. However, this is only surmise and, in any case, cannot affect the legal status of the specific nalr;re grandis which undoubtedly applies to the large Camptonectes from Catlins and is validated by Hector's figure.
Camptonectes grandis is closely related to C. giganteus Arkell from the upper Oxfordian of England, but differs in the outline of the anterior margin which is not so excavated below the right anterior ear. The set of the right anterior ear, also, is quite different, for the growth lines of the byssal notch of grandis meet the anterior dorsal margin rnuch more acutely, forming a narrower byssal notch. The right posterior ear shows dominant vertical growth ridges, the divergent Camptonectes punctate striae being very weak, and the groove separating the ear from the disk is weaker.» MARWICK, J. 1953. Divisions and faunas of the Hokonui System (Triassic and Jurassic). New Zealand Geological Survey Paleontological Bulletin, 21: 1-141, pls. 1-17 (Corrigenda supplement: S1-S3). [p. 100]
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Camptonectes grandis (Hect,).; J. Marwick, 1953, Divisions and faunas of the Hokonui System (Triassic and Jurassic), plate 14, figures 6, 7.
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