Systematics of <i>Encrinuroides</i> and <i>Curriella</i> (Trilobita), with a new Early Silurian encrinurine from the Mackenzie Mountains

Edgecombe, Gregory D.; Chatterton, Brian D. E.

doi:10.1139/e90-085

Cited by 21 publications

(31 citation statements)

References 17 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12), listed as Encrinurus by Mitchell et al (1972, p. 84) is from Ballinatray Old Mill (not Duffcarrick Rocks as stated by those authors) and may also be from the Ballinatray Formation rather than the underlying Courtown Limestone Formation. The small number of pleural ribs (five) suggests that these pygidia belong in Encrinuroides which, as Edgecombe and Chatterton (1990) have demonstrated, is a paraphyletic taxon in need of major revision. Although the type species is from the Ashgill of Wales, the other British species ascribed to Reed's genus are from various Llanvirn to Caradoc units in the Girvan district, in keeping with the generally Laurentian distribution of taxa assigned to Encrinuroides.…”

Section: Cheiruridsmentioning

confidence: 87%

Trilobite faunas of the Duncannon Group: Caradoc stratigraphy, environments and palaeobiogeography of the Leinster Terrane, IReland

Owen

Parkes

2000

Palaeontology

View full text Add to dashboard Cite

ABSTRACT. The Burrellian trilobite faunas of the Leinster terrane comprise at least 31 species from a spectrum of faunal associations. Strong faunal links with the Anglo-Welsh area confirm the likely close proximity of these parts of Avalonia during the mid Caradoc but together with existing magmatic and palaeomagnetic data, the Leinster faunas also indicate that the existing simple structural models of the relationship between these areas need to be reappraised. Of the 22 identifiable trilobite genera, eight are not known from equivalent or older horizons in the Anglo-Welsh area and indicate a significant link with Scoto-Appalachian faunas on the margins of Laurentia. This colonization by trilobites of Scoto-Appalachian origin may have been achieved by 'volcanic island hopping' across the shrinking Iapetus Ocean. The Leinster trilobites are therefore critical in documenting the breakdown of faunal provincialism and in fingerprinting the faunas and likely palaeogeographical setting of terranes now caught up in the Iapetus suture zone to the north. Eighteen species are described or discussed in detail including a new species of Ampyxina, A. hibernica sp. nov., a probable new species of Calyptaulax and revision of the M'Coy species Trinodus agnostiformis, Autoloxolichas laxatus, Flexicalymene forcipata and Remopleurides platyceps.

show abstract

Section: Cheiruridsmentioning

confidence: 87%

Trilobite faunas of the Duncannon Group: Caradoc stratigraphy, environments and palaeobiogeography of the Leinster Terrane, IReland

Owen

Parkes

2000

Palaeontology

View full text Add to dashboard Cite

show abstract

“…Howells (1982) regarded the binomial name as a synonym of Encrinurus hagshawensis Lamont, 1965, and rejected MacGuiganella as invalid. Ramsköld and Edgecombe (1994, p. 90) Lamont, 1978 Lectotype and paralectotype are deposited as HM A22641 and HM A22642, respectively (see Edgecombe and Chatterton, 1990b), in the collections of the Hunterian Museum, Glasgow; locality quoted as "150 m east of Newlands Farm, Craighead Inlier, near Girvan, Scotland"; Newlands Formation (lower Aeronian). Strusz (1980, p. 9) regarded Curriella as tentatively assigned to the genus Encrinuroides Reed, 1931, noting that C. newlandensis recalls Encrinuroides sexcostatus Phillips and Salter.…”

Section: Plate XXIX Figures 3-5; Page 261mentioning

confidence: 99%

“…newlandensis (followed by Morris, 1988). Edgecombe and Chatterton (1990b) considered that the name was valid and regarded Curriella newlandensis Lamont as the type species for the genus Curriella.…”

Section: Plate XXIX Figures 3-5; Page 261mentioning

confidence: 99%

See 1 more Smart Citation

Synoptic revision of the Silurian fauna from the Pentland Hills, Scotland described by Lamont (1978)

Candela

Crighton²

2019

Palaeontol Electron

View full text Add to dashboard Cite

Archibald Lamont (1907-1985) sampled the North Esk Inlier Silurian fauna for almost 30 years. He had amassed a substantial fauna that has been, in part, bequeathed to the National Museums Scotland after his death. Unfortunately, the descriptions of the faunas in his last opus were careless and the illustrations were uninformative. Nonetheless, these highlight the singularity and diversity of the Silurian invertebrate faunas in the North Esk Inlier. The taxa erected by Lamont are reviewed, discussed and properly illustrated, at least for those specimens that have been found in the collections of National Museums Scotland. An attempt has also been made to give more precision on the localities and horizons, based on the information in Lamont's article and on the various labels accompanying the specimens in storage.

show abstract

“…S IUCIFIED TRILOBITES from the Whittaker Formation and Delorme Group in the southern Mackenzie Mountains, Northwest Territories, Canada, have been studied systematically by Perry and Chatterton (1979, general survey of Delorme Range faunas), Chatterton and Perry (1983, odontopleurids;1984, cheirurids), Chatterton (1990a, I990b, 1992, encrinurids), and Edgecombe and Ramsköld (1992, encrinurids). Material from this region has also been used to illustrate works with more general themes (Edgecombe and Chatterton, 1987;Edgecombe et al, 1988;Chatterton et al, 1990aChatterton et al, , 1990b. The current paper is the first in a series describing the aulacopleurid trilobites of these strata.…”

mentioning

confidence: 99%

The aulacopleurid trilobite Otarion, with new species from the Silurian of northwestern Canada

Adrain

Chatterton

1994

J. Paleontol.

View full text Add to dashboard Cite

The genus Otarion Zenker, 1833, first appears in the Wenlock simultaneously with Cyphaspis Burmeister, 1843, as the oldest known species of each occur together in the southern Mackenzie Mountains of the Canadian Northwest Territories. The genera are unambiguous sister groups, a relationship supported most compellingly by a uniquely derived and distinctive pattern of juvenile cephalic spines, shared also with the Carboniferous genus Namuropyge Richter and Richter, 1939. This sister group relationship permits the development of a robust and stratigraphically correlated hypothesis of relationship among the adequately known species of Otarion, Otarion, Cyphaspis, and Namuropyge constitute the tribe Otarionini. The Mississippian genus Dixiphopyge Brezinski, 1988, may also belong to Otarionini. Namuropyge is a paedomorph, likely derived from a Degree Six or Seven meraspid of an older species of uncertain position in the Otarion–Cyphaspis clade.Three Wenlock species of Otarion occur in stratigraphic succession in a single section in the Mackenzie Mountains. Analysis of morphological change with time, and of sequential ontogenies, suggests that the Silurian history of the genus was dominated by incidents of peramorphosis.New species are Otarion huddyi, O. beukeboomi, and O. coppinsensis. Otarion brauni Perry and Chatterton, 1979, is revised.

show abstract

Systematics of Encrinuroides and Curriella (Trilobita), with a new Early Silurian encrinurine from the Mackenzie Mountains

Cited by 21 publications

References 17 publications

Trilobite faunas of the Duncannon Group: Caradoc stratigraphy, environments and palaeobiogeography of the Leinster Terrane, IReland

Trilobite faunas of the Duncannon Group: Caradoc stratigraphy, environments and palaeobiogeography of the Leinster Terrane, IReland

Synoptic revision of the Silurian fauna from the Pentland Hills, Scotland described by Lamont (1978)

The aulacopleurid trilobite Otarion, with new species from the Silurian of northwestern Canada

Contact Info

Product

Resources

About