Early Idamean (Late Cambrian) agnostoid trilobites from the Huskisson River, Tasmania

Jago, JB; Brown, AV

doi:10.26749/rstpp.126.59

Cited by 10 publications

(7 citation statements)

References 2 publications

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“…8C±E), to strongly reticulated (derived) G. reticulatus (commonly formalised as G. reticulatus reticulatus; e.g. Henningsmoen 1958;Palmer 1962;Shergold 1982;Rushton 1983;Jago & Brown 1992;Peng 1992;Ahlberg & Ahlgren 1996;Clarkson et al 1998; Fig. 8F±G).…”

Section: Introductionmentioning

confidence: 99%

“…Slope areas are characterized by a combination of some shelf-dwelling taxa and basin-dwelling taxa. The combination of cosmopolitan agnostoids, which have intercontinental correlation utility, Gondwanan shelf-dwelling polymerids, pan-tropical polymerids, and widespread polymerids in the Jiangnan Slope Belt (Egorova et al 1963;Peng et al 2001a) allows for the precise correlation of the base of the G. reticulatus Zone (and other marker horizons) into such Gondwanan shelf areas as the North China Platform (Zhang & Jell 1987), and Australia (O È pik 1963, 1966, 1967Shergold 1982;Jago & Brown 1992); and into such slope areas as Kazakhstan (Ergaliev 1980(Ergaliev , 1990, France , Iran (Peng et al 1999a), Oman (Fortey 1994), and Victoria Land, Antarctica (Cooper et al 1996). Correlation into highlatitude shelf areas of Baltica (Westerga Êrd 1946;Ahlberg & Ahlgren 1996;Ahlberg 2003), and shelfedge regions of Laurentia (Palmer 1999) and Siberia (Ivshin & Pokrovskaya 1968;Rosova 1968Rosova , 1984) is also precise.…”

Section: Introductionmentioning

confidence: 99%

“…The base of the G. reticulatus Zone coincides with turnovers in polymerid trilobite faunas recognized at the base of the Waergangian Stage and the Hunanian Series in South China (Peng et al 1999b(Peng et al , 2001cPeng & Babcock 2001; Fig. 6), the base of the Changshanian (Paishanian) in North China (Walcott 1913;O È pik 1967;Qian 1994), the base of the Idamean Stage in Australia and Tasmania (O È pik 1960, 1963, 1967Jago 1974;Shergold 1982;Jago & Brown 1992), the base of the Sackian Stage and base of the Upper Cambrian Series in Kazakhstan (Ergaliev 1990), and the base of the Kugorian (Kutugunian) Stage in Siberia (sensu Rosova 1984). The base of the G. reticulatus Zone corresponds to the base of the Steptoean Stage and Millardan Series (Palmer 1965(Palmer , 1998(Palmer , 1999Ludvigsen & Westrop 1985) in Laurentia.…”

Section: Introductionmentioning

confidence: 99%

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Global Standard Stratotype‐section and Point (GSSP) of the Furongian Series and Paibian Stage (Cambrian)

Shanchi

Babcock

Robison

et al. 2004

LET

154

141

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The Global Standard Stratotype‐section and Point (GSSP) of the Furongian Series (uppermost series of the Cambrian System) and the Paibian Stage (lowermost stage of the Furongian Series), has been recently defined and ratified by the International Union of Geological Sciences (IUGS). The boundary stratotype is 369 metres above the base of the Huaqiao Formation in the Paibi section, northwestern Hunan Province, China. This point coincides with the first appearance of the cosmopolitan agnostoid trilobite Glyptagnostus reticulatus, and occurs near the base of a large positive carbon isotopic excursion (SPICE excursion).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Global Standard Stratotype‐section and Point (GSSP) of the Furongian Series and Paibian Stage (Cambrian)

Shanchi

Babcock

Robison

et al. 2004

LET

154

141

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“…correlation of the base of the G. reticulatus Zone with other Gondwanan sectors, such as the North China Platform (Zhang and Jell, 1987), Kazakhstan (Ergaliev, 1990), Australia (Jago and Brown, 1992), Oman (Fortey, 1994), Antarctica (Cooper et al, 1996), and Iran (Peng et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

A review of the Late Cambrian (Furongian) palaeogeography in the western Mediterranean region, NW Gondwana

Álvaro

Ferretti

González‐Gómez

et al. 2007

Earth-Science Reviews

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The Cambrian-Ordovician transition of the western Mediterranean region (NW Gondwana) is characterized by the record of major erosive unconformities with gaps that range from a chronostratigraphic stage to a series. The hiatii are diachronous and involved progressively younger strata along the Gondwanan margin, from SW (Morocco) to NE (Montagne Noire). They can be related to development of a multi-stage rifting (further North), currently connected to the opening of the Rheic Ocean, and concomitant erosion on southern rift shoulders. The platforms of this margin of Gondwana occupied temperate-water, mid latitudes and were dominated by siliciclastic sedimentation, while carbonate factories were only episodically active in the Montagne-Noire platform. The Upper Cambrian is devoid of significant gaps in the southern Montagne Noire and the Iberian Chains. There, the sedimentation took place in a transgressive-dominated depositional system, with common offshore deposits and clayey substrates, and was bracketed by two major regressive trends. The Late Cambrian is also associated with the record of volcanic activity (e.g., in the Cantabrian and Ossa-Morena zones, and the northern Montagne Noire), and widespread development of a tectonic instability that led to the episodic establishment of palaeotopographies and record of slope-related facies associations. Several immigration events are recognized throughout the latest Middle Cambrian, Late Cambrian and Tremadocian. The trilobites show a stepwise replacement of Acado-Baltic-type families (e.g., the conocoryphid-paradoxidid-solenopleurid assemblage) characterized by: (i) a late Languedocian (latest Middle Cambrian) co-occurrence of Middle Cambrian trilobite families with the first anomocarid, dorypygid and proasaphiscid invaders; (ii) a Late Cambrian immigration replacing previous faunas, composed of trilobites (aphelaspidids, catillicephalids, ceratopygids, damesellids, eulomids, idahoiids, linchakephalids, lisariids, onchonotinids, and pagodiids), linguliformean brachiopods (acrotretids, obolids, scaphelasmatids, siphonotretids, and zhanatellids), echinoderms (mitrates, glyptocystitid cystoids, and stromatocystoids), and conodonts belonging to the lower Peltura Zone; and (iii) the subsequent input of new trilobites (asaphids, calymenids, catillicephalids, nileids and remopleurids), which marks the base of the Proteuloma geinitzi Zone, associated with pelmatozoan holdfasts (Oryctoconus), and a distinct input of late Tremadocian conodonts (Paltodus deltifer Zone). The biogeographic distribution of latest Middle and Late Cambrian trilobites supports brachiopod data indicating strong affinities between the western Mediterranean region, East Gondwana (North China/Korea, South China, Australia, and Antarctica) and Kazakhstania during the late Languedocian, which became significantly stronger during the Late Cambrian. This major shift may suggest modification in oceanic circulation patterns throughout Gondwana across the Middle-Late Cambrian transition. (c) 2007 Elsevier B.V. A...

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“…Upper Cambrian Bebee, 1990 Middle Cambrian Robison, 1964 Upper Cambrian Bebee, 1990 Upper Cambrian Bebee, 1990 Upper Cambrian Rasetti, 1965 Upper Cambrian Bebee, 1990 Upper Cambrian Palmer, 1965 Upper Cambrian Ludvigsen et al, 1989 Middle Cambrian Romanenko, 1988 Middle Cambrian Palmer & Halley, 1979 Middle Cambrian Palmer & Halley, 1979 Upper Cambrian Ergaliev, 1980 Upper Cambrian Morris & Fortey, 1985 Upper Cambrian Morris & Fortey, 1985 Middle Cambrian Schwimmer, 1973 Middle Cambrian Schwimmer, 1973 Upper Cambrian Webby et al, 1988 Upper Cambrian Ludvigsen et al, 1989 Downloaded from Brill.com07/14/2020 01:34:02AM via free access 1989 Proasaphiscus rigidus Yegorova & Savitskiy, 1968 Probilacunaspis prolatus Ergaliev, 1980 Proceratopyge gordonensis Jago, 1987 Proceratopyge occella Webby, Qizheng & Mills, 1988 Proceratopyge rectispinatus (Troedsson, 1937) Proceratopyge rectispinatus (Troedsson, 1937) Proceratopyge sp.…”

Section: Glyphopeltis Primus Deiss 1939mentioning

confidence: 99%

Arthropod pattern theory and Cambrian trilobites

Sundberg

1995

BTD

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An analysis of duplomere ( = segment) distribution within the cephalon, thorax, and pygidium of Cambrian trilobites was undertaken to determine if the Arthropod Pattern Theory (APT) proposed by Schram & Emerson (1991) applies to Cambrian trilobites. The boundary of the cephalon/thorax occurs within the predicted duplomere node 1 (duplomeres 4 or 6). The boundary between the thorax and pygidium generally occurs within node 2 (duplomeres 11–13) and node 3 (duplomeres 18–20) for corynexochids and ptychopariids, respectively. This boundary occurs within field 4 (duplomeres 21–n) for olenellids and redlichiids. The termination of the body generally occurs within node 3 for corynexochids and within field 4 for olenellids, redlichiids, and ptychopariids. In addition, the location of macropleural spines, which may indicate the location of the gonopores or anus, generally falls at the predicted duplomeres. The boundary between the prothorax and opisthothorax of olenellids occurs within or near node 3. These results indicate that the number and distribution of duplomeres within Cambrian trilobites were somewhat constrained by some genetic patterning program. However, the common distribution of boundaries outside of the predicted locations and the possible shifting of nodes suggest that other factors were also controlling the number of duplomeres within the body parts. This variation supports the idea that Cambrian arthropods, unlike modern arthropods, had a simpler genetic program, which easily allowed for changes in the Bauplan.

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Early Idamean (Late Cambrian) agnostoid trilobites from the Huskisson River, Tasmania

Cited by 10 publications

References 2 publications

Global Standard Stratotype‐section and Point (GSSP) of the Furongian Series and Paibian Stage (Cambrian)

Global Standard Stratotype‐section and Point (GSSP) of the Furongian Series and Paibian Stage (Cambrian)

A review of the Late Cambrian (Furongian) palaeogeography in the western Mediterranean region, NW Gondwana

Arthropod pattern theory and Cambrian trilobites

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