Measurement of thecal spacing in graptolites

Howe, Michael P. A.

doi:10.1017/s0016756800027795

Cited by 51 publications

(30 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the crispus Biozone posterus and altissimus were joined by Pe. wilsoni (Hutt, 1974) and a few as yet unpublished species (Howe 1982). None of these survived into the spiralis Biozone.…”

Section: Diplograptidsmentioning

confidence: 99%

Worldwide correlation of Telychian (Upper Llandovery) strata using graptolites

Loydell

1993

View full text Add to dashboard Cite

The formal boundaries to the Telychian Stage have been stated to correlate with the bases of the Monograptus turriculatus Biozone at the bottom and the Cyrtograptus centrt~ugus Biozone at the top. The evidence for this, however, is far from conclusive.The Telychian has been divided, mainly using monograptids, into eight or more biozones, although fewer have been recognized in Britain due to the general paucity of recent studies of the graptolite faunas of this age and to the existence of 'barren beds' high within most British Telychian sections. Each biozone has a duration of only a few hundred thousand years, but most are, at present, difficult to recognize in the absence of the index species or where this species' stratigraphical range extends beyond the limits of its biozone.Intercontinental correlation of Telychian strata using graptolites is hampered to a limited extent by provincialism and water mass specificity, and considerably by taxonomic problems. A thorough taxonomic revision of published species would provide a firm foundation for future biostratigraphical subdivision and correlation of the Telychian Stage. Knowledge of Telychian graptolite biostratigraphy would also be enhanced by restudies of two classic sections, the Trannon river section in Wales, and the Bajiaokou section, Ziyang, China.centrifugus Biozone by Rickards (1976).

show abstract

“…In the crispus Biozone posterus and altissimus were joined by Pe. wilsoni (Hutt, 1974) and a few as yet unpublished species (Howe 1982). None of these survived into the spiralis Biozone.…”

Section: Diplograptidsmentioning

confidence: 99%

Worldwide correlation of Telychian (Upper Llandovery) strata using graptolites

Loydell

1993

View full text Add to dashboard Cite

show abstract

“…The autothecae are straight and slender with a length of about 0.9 mm, and bend slightly towards the ventral side. The 2TRD (Howe, 1983) near the proximal end is 1.25-1.3 mm. Remarks: Monteros and Moya (2011) reported Staurograptus mojotorensis (originally as Anisograptus mojotorensis) from the lower third of the Floresta Formation in Argentina.…”

Section: Remarksmentioning

confidence: 93%

Taxonomic and biostratigraphic reappraisal of some early Tremadocian (Ordovician) graptolites from Changde, South China

Wang

Muir²

2015

Palaeoworld

View full text Add to dashboard Cite

“…The two thecae repeat distance (2TRD) (Howe 1983) employed herein is the commonly used method for measuring thecae spacing in graptoloid taxa. 2TRD data may be shown in diagrams or plotted against values of dorso-ventral width (Howe 1983), but in general, measured values are instead given in tables for a selected number of thecae (e.g., Williams & Zalasiewicz 2004;Tab.…”

Section: Methodsmentioning

confidence: 99%

“…2TRD data may be shown in diagrams or plotted against values of dorso-ventral width (Howe 1983), but in general, measured values are instead given in tables for a selected number of thecae (e.g., Williams & Zalasiewicz 2004;Tab. 1).…”

Section: Methodsmentioning

confidence: 99%

Cyrtograptids from the Telychian (upper Llandovery) of Kinnekulle Mountain, southern Sweden

Arvestål¹,

Streng²

2013

GFF

View full text Add to dashboard Cite

PostprintThis is the accepted version of a paper published in GFF. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Arvestål, E., Streng, M. (2013) Cyrtograptids from the Telychian (upper Llandovery) of Kinnekulle Mountain, southern lapworthi indicates that the most proximal cladium was not necessarily the first to be formed.It appears that the first cladium originated distally and more proximal cladia formed afterwards as a counterbalance to the growing rhabdosome, allowing the organism to remain stable in the water column.

show abstract

Measurement of thecal spacing in graptolites

Cited by 51 publications

References 1 publication

Worldwide correlation of Telychian (Upper Llandovery) strata using graptolites

Worldwide correlation of Telychian (Upper Llandovery) strata using graptolites

Taxonomic and biostratigraphic reappraisal of some early Tremadocian (Ordovician) graptolites from Changde, South China

Cyrtograptids from the Telychian (upper Llandovery) of Kinnekulle Mountain, southern Sweden

Contact Info

Product

Resources

About