Topic
Spirifer
About: Spirifer is a research topic. Over the lifetime, 57 publications have been published within this topic receiving 448 citations.
Papers published on a yearly basis
Papers
TL;DR: Several small Spirifers of the Upper Palæozoic rocks of this country have been referred to Ambocœlia Hall, a genus proposed to include certain American Devonian and Carboniferous forms with a peculiar internal structure; the genotype is Orthis umbonata Conrad, a species from the Hamilton Group (Lower Devonian) of North America.
Abstract: Several small Spirifers of the Upper Palaeozoic rocks of this country have been referred to Ambocœlia Hall. This genus was proposed to include certain American Devonian and Carboniferous forms with a peculiar internal structure; the genotype, designated by Hall, is Orthis umbonata Conrad, a species from the Hamilton Group (Lower Devonian) of North America. In the paper in which he established the genus, Hall (1860, p. 71) suggested that Spirifer unguiculus Sowerby sp. (a British Devonian form) might also be included in the genus. The opinion generally held, for example by King (1850, p. 135) and Davidson (1858, vol. ii, pt. 4, p. 59), that Spirifer unguiculus is closely allied to, if not identical with, Spirifer urei Fleming and Martinia clannyana King, led observers to place these species also in the genus Ambocœlia . It naturally followed that, so far as the British species were concerned, the genus was described in terms of the external form of these species. In particular, emphasis was laid upon the presence of a dorsal valve considerably flatter than the ventral, and upon the development of a more or less narrowly defined median sulcus in the former. Such a procedure resulted in a neglect of the internal features that Hall so clearly distinguished. Further, the discovery of spines in Martinia clannyana , and later in Spirifer urei , led to a belief that a spinose surface is also characteristic of the genus. In no instance, so far as I am aware, has any reference been made to the
66 citations
Journal Article•
TL;DR: The marine invertebrates of the Pillahuinco group (Permian) of the southern hills of Buenos Aires (eastern Argentina) are described in this paper, where the forms are principally pelecypods; two brachiopods and a few indeterminable gastropods are also found.
Abstract: The marine invertebrates of the Pillahuinco group (Permian) of the southern hills of Buenos Aires (eastern Argentina) are described. The forms are principally pelecypods; two brachiopods and a few indeterminable gastropods are also found. Nine pelecypod species described as new are: Stutchburia? argentinensis, Astartella? pusilla, Schizodus cycloliratus, Aphanaia? orbirugata, Liopteria dutoiti, L. bonaerensis, Eurydesma altum, Promytilus acinaciformis and Allorisma in- flectoventris. In addition, the Australian species Eurydesma cordatum and E. hobar- tense and the Indian form E. mytiloides are identified. The brachiopods include a new species, "Chonetes" pillahuincensis, and the Australian species "Spirifer" dar- wini for which the new genus Notospirifer is proposed. With the exception of Astartella?, found in the topmost beds of the Sauce Grande formation, and of inde- terminable gastropods from the lower part of the Piedra Azul formation, the fossils are from the lower half of the Bonete formation, noted also for its Glossop- teris flora remains. Elements in the Bonete fauna have close affinities with those of the lower and upper Marine series of New South Wales, Australia, usually regarded as Permian. They include the first Eurydesma remains known from South America.
62 citations
TL;DR: Authigenic silica occurs in carbonate rocks of Upper Carboniferous and Permian age from Bear Island (Svalbard). Fibrous, length-slow spherulitic silica in the form of quartzine and/or lutecite, megaquartz and microcrystalline quartz have been differentiated.
Abstract: Authigenic silica occurs in carbonate rocks of Upper Carboniferous and Permian age from Bear Island (Svalbard). Fibrous, length-slow spherulitic silica in the form of quartzine and/or lutecite, megaquartz and microcrystalline quartz have been differentiated. In the Carboniferous rocks (Fusulina Limestone Formation) all of these varieties of quartz reveal relict fibrous structure and inclusions of sulphates, while in the Permian (Spirifer Limestone Formation) no traces of sulphates were discernible. Association of length-slow fibrous silica (quartzine and/or lutecite) with sulphates is a commonly observed feature in the geological record and this particular variety was considered by Pittman and Folk (1970; 1971) as diagnostic of ancient evaporite environments.
53 citations
1 Jan 1963
TL;DR: The faunas of the Tulcumba Sandstone and its member, the Rangari Limestone from the western edge of the Werrie and Belvue synclines of western New England are described in this paper.
Abstract: The faunas of the Tulcumba Sandstone and its member, the Rangari Limestone, from the western edge of the Werrie and Belvue synclines of western New England are described. The stratigraphical and palaeontological data are considered to indicate a Tournaisian (Kinderhookian) age. The gastropods and lamellibranchs include several Devonian holdovers, and the affinities of the brachiopods are as much with late Devonian as with Carboniferous forms. The trilobite genus Australosutura is shown to be much longer ranging than was previously thought to be the case. Most of the species described are new and are not known from units higher in the Carboniferous in New South Wales. One new chonetoid brachiopod genus, Tulcumbella with type species T. microstriata n.sp., and one new trilobite genus Weania, with type species W. goldringi n.sp., are described. Other new brachiopods are Acanthatia rangariensis, Spirifer lirellus sol, Tylothyris minima, Brachythyris solida and Cranaena concava. New polyzoans are Evac...
41 citations
TL;DR: The Early Carboniferous brachiopod zones of eastern Australia are defined from reference sections in New South Wales as mentioned in this paper, and the zones include the Tulcumbella tenuistriata, Spirifer sol, Schellwienella cf. burlingtonensis, Orthotetes australis, Delepinea aspinosa, and Rhipidomella fortimuscula Zones.
Abstract: The Early Carboniferous brachiopod zones of eastern Australia are defined from reference sections in New South Wales. The zones include the Tulcumbella tenuistriata, Spirifer sol, Schellwienella cf. burlingtonensis, Orthotetes australis, Delepinea aspinosa, and Rhipidomella fortimuscula Zones. Two contain subzones: the Pustula gracilis Subzone is recognized in the upper part of the Schellwienella cf. burlingtonensis Zone in the Rouchel district, New South Wales; and the Inflatia elegans and Gigantoproductus tenuirugosus Subzones are recognized in the lower and upper portions respectively of the Delepinea aspinosa Zone. Reinterpretation of the zones from new information on the ranges of brachiopod species and on detailed stratigraphy has resulted in changes in the identification of certain zones, particularly the Spirifer sol Zone, and alterations to stratigraphic correlations within both New South Wales and Queensland. Three zones, the Tulcumbella tenuistriata, Schellwienella cf. burlingtonensis,...
34 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2019 | 1 |
| 2017 | 1 |
| 2015 | 1 |
| 2011 | 2 |
| 2009 | 1 |