XXVI.—<i>Notes on the Palœozoic Bivalved Entomostraca</i>.—No. XXII. <i>On some undescribed species of British Carboniferous Ostracoda</i>

Jones, T. Rupert; Kirkby, James W.

doi:10.1080/00222938609459968

Cited by 23 publications

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“…One carapace missing parts of its shells, a second carapace missing one shell, and steinkerns of carapaces are available from USGS collection 13288. In size and posterior outline these specimens resemble the steinkern illustrated by Jones and Kirkby (1865) but differ in lateral outline and dorsal aspect. They are easily differentiated from Chamishaellal sp.…”

Section: A13mentioning

confidence: 67%

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New Late Mississippian ostracode genera and species from northern Alaska; a revision of the Paraparchitacea

Sohn¹

1971

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Collection from the marine Alapah Limestone, Brooks Range, Alaska, contain abundant and diversified ostracodes and include growth series of several taxa referable to Paraparchites. Study of these populations and a review of the world literature make it possible to discriminate several new genera in this group. I conclude that the ostracodes in these genera should be oriented so that the plenate end is posterior; that dimorphism is shown in the width of the posterior and (or) width below the midheight; that the presence or absence of dorsoposterior spines is constant within genera, and that these spines or tubercles, unlike those in the Leperditicopida, are not eye tubercles; that adults of some genera in the Paraparchitidae may be smaller than instars of other genera in this group; and that reversal of overlap and hingement is not a taxonomic criterion in this group. The presence of a well-developed inner lamella and a cyprid adductor muscle-scar pattern in some of the genera remove this group from the Palaeocopida as presently defined. In order to document the above conclusions, several genera and species from areas other than Alaska are discussed and illustrated.

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Section: A13mentioning

confidence: 67%

“…This species differs from Leperditia okeni (Minister). Jones and Kirkby, 1865, in that the ventral margin is not truncated posteriorly. Most of the specimens referred to Leperditia okeni, and later to Paraparchites okeni (Minister, 1830) are misidentified as to species, and some as to genus.…”

Section: Plate 9 Figures 1-44mentioning

confidence: 99%

New Late Mississippian ostracode genera and species from northern Alaska; a revision of the Paraparchitacea

Sohn¹

1971

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“…This species differs from S. armstrongiana (Jones and Kirkby, 1886) in that the spine is closer to the dorsal margin but not as close as in S. spinigera (McCoy, 1844), originally referred to Cythere. The greatest height in lateral outline is closer to the anterior margin in the new species than in both the above species.…”

Section: Genus Proparaparchites Cooper 1941mentioning

confidence: 65%

Late Paleozoic ostracode species from the conterminous United States

Sohn¹

1972

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Growth stages of eight new species of ostracodes of Early Mississippian through Permian age from California, Indiana, Nevada, New Mexico, and Texas are described and illustrated; one species, Shishaella sp., from the Permian of Texas is illustrated but not formally named. Paraparchites subcircularis Geis, 1932, is considered a synonym of P. carbonaria (Hall, 1858), here referred to Chamishaella, and a lectotype for C. carbonaria is designated and illustrated. Paraparchites marathonensis Hamilton, 1942, is reillustrated and referred to Shishaella. Paraparchites humerosus var.

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“…The two specimens of this new species distinguish themselves from C . tuherc~ulospinosu (Jones & Kirkby, 1886) by a more elongated shape, due to a slightly extended posterior end. The dorsal spines are less pronounced and the reticulation pattern is variable, reticulum being relatively smaller in the posterior part, along the margins and on the nodes.…”

Section: Systematic Palaeontologymentioning

confidence: 99%

“…This new species has similarities in shape and surface ornament to R . reticulosa (Jones & Kirkby, 1886) and R. simplicissima (Knight, 1928). It is distinguished by the presence of two relatively larger posterodorsal spines observable in dorsal view (PI.…”

Section: Explanation Of Platementioning

confidence: 99%

Ostracods as palaeoenvironmental indicators in the Lower Carboniferous Yoredale Series of northern England

Masurel

1989

J. Micropalaeontol.

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Abstract. The ostracod fauna and vertical changes in its composition were examined in a shale sequence of the 5-Yard Limestone cyclothem (Yoredale Series) at a locality in Bishopdale, N. Yorkshire. The ostracod tax a are mainly confined to three superfamilies: Kirkbyacea, Healdiacea and Bairdiacea. The co-occurrence of several relatively short-ranging species such as Kirkbya quadrata, Cribroconcha insculpta and Bairdiolites elevatus suggests a Late Brigantian age. Four new species are described: Cornigella posteroextensa, ? Eriella minima, Rectobairdia bavarica and Roundyella binoda.Fluctuations in influx of terrigenous mud and water turbulence, related to delta growth, appear to have been the main environmental parameters that controlled the ostracod distribution and abundance along a nearshore-offshore gradient. Three different ostracod assemblages are recognized. A Roundyella-Cribroconcha assemblage, dominated by kirkbyacean and healdiacean ostracods, represents a quiet, nearshore environment with a fairly high depositional rate of terrigenous mud. A Bairdia assemblage, higher in the section, is dominated by bairdiacean ostracods that lived in a more turbulent, relatively offshore environment with less input of terrigenous sediment. A third, intermediate assemblage consists of almost equal amounts of bairdiacean and kirkbyacean ostracods, and reflects a transition from the Bairdia to the Roundyella-Cribroconcha assemblage.

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XXVI.—Notes on the Palœozoic Bivalved Entomostraca.—No. XXII. On some undescribed species of British Carboniferous Ostracoda

Cited by 23 publications

References 0 publications

New Late Mississippian ostracode genera and species from northern Alaska; a revision of the Paraparchitacea

New Late Mississippian ostracode genera and species from northern Alaska; a revision of the Paraparchitacea

Late Paleozoic ostracode species from the conterminous United States

Ostracods as palaeoenvironmental indicators in the Lower Carboniferous Yoredale Series of northern England

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