Leperditicopid ostracodes from Ordovician rocks of Kentucky and nearby states and characteristic features of the order Leperditicopida

Berdan, Jean M.

doi:10.3133/pp1066j

Cited by 17 publications

(44 citation statements)

References 3 publications

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“…These environments match those of other leperditiid faunas from North America, Europe, Siberia and elsewhere (BERDAN 1984). These environments match those of other leperditiid faunas from North America, Europe, Siberia and elsewhere (BERDAN 1984).…”

Section: Introductionsupporting

confidence: 62%

“…Like other leperditiids (BERDAN 1984;SIVETER 1984), sinoleperditiines could tolerate considerable variations in salinity and energy. BERDAN (1984) added that the animals with smooth shells might have burrowed just below the surface of the mud on intertidal flats when the tide went out, in the manner of modern intertidal arthropods. During the Devonian in South China, the leperditiid association often occurs together with the palaeocopid association (mixed leperditiid and palaeocopid association), which represents generally the same environment as the palaeocopid association.…”

Section: Introductionmentioning

confidence: 99%

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Sinoleperditiini (Ostracoda) from the Devonian of South China

Wang

McKenzie

2000

Senckenbergiana lethaea

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Section: Introductionsupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Sinoleperditiini (Ostracoda) from the Devonian of South China

Wang

McKenzie

2000

Senckenbergiana lethaea

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“…1995, and the Bohemian aristozoids (Chlupai-1992(Chlupai- ,1994. The size, shape ofthe carapace and the external, presumed vascular features of OrdovicianDevonian leperditicope ostracodes (Berdan 1984;Wang 1994) also closely resemble those of Anabarochilina. This could be a case of evolutionary convergence or taken to support the notion that there may be phylogenetic links between certain bradoriids, the phyllocarids and the leperditicopes (see Vannier & Abe 1995).…”

Section: Vascular Features In Cambrian Bivalved Arthropodsmentioning

confidence: 83%

The Cambrian origin of the circulatory system of crustaceans

Vannier

Williams

Siveter

1997

LET

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The carapace of Recent crustaceans such as myodocope ostracodes and phyllocarids is pervaded with well-developed anastomosing sinuses conveying hemolymph from the metabolizing organs to the dorsal heart. The inner lamella cuticle, which separates the sinuses from seawater, is thin enough to allow gaseous diffusion (e.g., 0, uptake) over its surface. Comparable radiating and/or anastomosing features, of possible vascular origin, are herein recognized in several possible Crustacea from the Cambrian: cambriid, svealutiid, hipponicharionid and beyrichonid Bradoriida and in Carnarvonia from the middle Cambrian Burgess Shale. The vascular network is basically the same in these groups, consisting of sinuses radiating from supposed adductorial areas or from inferred areas of dorsal attachment of the body. The integumental (carapace sinuses) and branchial (gills) systems of respiration in crustaceans and crustaceanlike animals were probably already differentiated by the middle Cambrian. The oldest record of probable integumental circulation is in the bradoriid Petrianna from the early Cambrian of Greenland. Similar circulatory systems may be represented by radiating ridges on the cephalon of other Cambrian arthropod groups such as the arachnomorphs (Burgessia) and trilobites (Naraioa) and may also be manifest in the carapaces of Ordovician-Devonian leperditicope ostracodes. Organs on the thoracopods of Cambrian supposed crustaceans, such as Canadaspis, resemble the foliaceous thoracic gills of Recent nebaliid phyllocarids and therefore may have served the same (respiratory) function.

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“…10). By contrast, all other major Palaeozoic (and to some extent Recent) groups have complex (leperditians, Berdan 1984), radiated/reniform (Silurian myodocopids) or indistinct (muscle attachment on adductorial sulcus in Palaeozoic palaeocopes and binodicopes) muscle scars.…”

Section: Muscle Scarsmentioning

confidence: 99%

Functional morphology and mode of life of Palaeozoic leiocope ostracodes

Vannier

1990

LET

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Leiocopes differ from all other major ostracode groups (e.g. Palaeocopa. Binodicopa, Podocopa, Myodocopa) mainly in having a simple rounded/convex shape and a strong (dorsal and/or ventral) asymmetry. These morphological features are highly conservative in leiocopes through the Palaeozoic (lower Ordovician‐middle Devonian). Functional morphology and facies distribution suggest that typical ‘dome‐like’ leiocopes (e.g. aparchitids) may have lived off the bottom in relatively deep water environments, contrasting with most (inferred) benthic Palaeozoic ostracodes (e.g. heavily calcified dimorphic palaeocopes). Reversely, smaller sized and both dorsally and ventrally asymmetrical leiocopes (e.g. Ordovician jaanussoniids) are considered as possible benthic dwellers with reduced mobility on or within the substratum. □Ostracodes, Leiocopa, Aparchitidae, Jaanussoniidae. Palaeozoic. Ordovician, Silurian, Devonian, asymmetry, functional morphology.

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Leperditicopid ostracodes from Ordovician rocks of Kentucky and nearby states and characteristic features of the order Leperditicopida

Cited by 17 publications

References 3 publications

Sinoleperditiini (Ostracoda) from the Devonian of South China

Sinoleperditiini (Ostracoda) from the Devonian of South China

The Cambrian origin of the circulatory system of crustaceans

Functional morphology and mode of life of Palaeozoic leiocope ostracodes

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