Systèmes de diverses classes d'animaux sans vertèbres. principalement de celles des côtes de l'Égypte et de la Syrie, offrant les caractères tant distinctifs que naturels des ordres, familles et genres, avec la description des espèces. Système des annelides (I)

Benedict, James E.; Savigny, Jules-César

doi:10.5962/bhl.title.66284

Cited by 33 publications

(38 citation statements)

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“…Sabellariids were first described as sabellids, and moved to the terebellids by Savigny ( 1822). Grube ( 1850) put them into a separate family among the limivores (sedentaries), and Levinsen (1883) gave them status as a separate suborder on line with the sabellids.…”

Section: Protodrilidaeczerniavsky 1881amentioning

confidence: 99%

“…Three different body-forms, depending essentially on the presence and relative length of the ventral groove, are represented; all three are well-illustrated in Day (1967). Opheliids were first described by Savigny (1822) and grouped among the sedentaries, despite the lack of tubes and distinct body regions in some (e.g. Ophelina).…”

Section: Opheliidae Malmgren 1867mentioning

confidence: 99%

“…Pectinariids have always been considered to be related to the terebellids (Savigny 1822;Grube 1850;Levinsen 1883;Fauvel 1927). The two families do not share many external features, except the presence of tori with uncini, but the internal structures are rather similar.…”

Section: Pectinariidaequatrefages 1866mentioning

confidence: 99%

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Polychaete systematics: Past and present

1997

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In this paper, we first demonstrate the historical background for the current unsatisfactory state of systematics of the polychaetes. We then briefly discuss our knowledge of internal and external structures. A review of the polychaete families makes up the third section; 81 families are treated in detail. Five families have been recently synonymized with others, and six families are too poorly known to be sufficiently characterized. Fossil polychaetes are briefly mentioned, with specific attention to problems associated with incorporating them in recent systematics.The traditional separation in 'errant' and 'sedentary' polychaetes has increasingly become recognized as being unsatisfactory; however, the current trend towards grouping the polychaetes in many orders without specifying the relationships among the orders, is no more satisfactory. The lack of consistent morphological information is a major source of uncertainty. Intensive morphological studies should remove terminological ambiguities and alleviate some of the problems.

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Section: Protodrilidaeczerniavsky 1881amentioning

confidence: 99%

Section: Opheliidae Malmgren 1867mentioning

confidence: 99%

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Polychaete systematics: Past and present

1997

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“…4-8) made a thorough description of some of his nereidids from Balaklava Bay (44°30' N, 33°36' E) as N. pulsatoria? This was because he noted some differences from the description of N. pulsatoria (Savigny, 1822) such as body and eye pigmentation, and the size of the upper parapodial lobes, with dorsal cirri clearly longer than upper notopodial lobes in median and posterior chaetigers. However, the arrangement of paragnaths or fine details of the chaetal blades were not clarified or illustrated.…”

Section: Historical Accountmentioning

confidence: 99%

“…He listed N. pulsatoria (Savigny, 1822) and N. splendida Grube, 1840, but N. falsa de Quatrefages, 1866 was not recognized. Characters for N. pulsatoria include antennae about as long as the palps, a smooth anterior peristomial margin which is not projected, and homogomph falcigers with short, slightly denticulated blades.…”

Section: Historical Accountmentioning

confidence: 99%

How false is Nereis falsa (Annelida, Phyllodocida, Nereididae)?

Salazar‐Vallejo

Gillet²,

Surugiu

2017

RBT

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Abstract:There are many taxonomic problems in polychaete species names and solving confusing or inadequate taxonomic procedures is both time-demanding and extremely important. Our objective in this contribution was to analyse what is the current taxonomic situation for Nereis falsa de Quatrefages, 1866; it was based upon Nereis pulsatoria? Rathke, 1837 from the Black Sea, and it is currently regarded as having a very wide distribution. The species has been collected from different benthic substrates and even can be found on floating objects or marine turtles. Nereis falsa has been recorded from the Mediterranean Sea, the Eastern Atlantic along Africa, the Western Atlantic (Gulf of Mexico, Caribbean Sea, Brazil), and the Indian Ocean. However, despite the fact N. falsa was proposed as a species from the Black Sea, it has not yet been found there. How can we explain that a species is able to attain a very wide distribution and yet be missing from its type locality? After a careful study of previous publications and with our understanding of the systematics of nereidid polychaetes, we clarify the current situation by examining several related species and pointed out some nomenclatural issues. Our analysis indicates there is more than one species included under the same name, and in this contribution we propose some means to promote discussion and actions, and suggest some basic research for solving this issue. Rev. Biol. Trop. 65 (3): 847-857. Epub 2017 September 01.

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Lophotrochozoa in the Cambrian evolutionary radiation and the Pelagiella problem

Landing

Geyer

Jirkov

et al. 2021

Papers in Palaeontology

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Tiny snail-like conchs of Pelagiella Matthew are important in discussions of lophotrochozoan and mollusc origins in the Cambrian evolutionary radiation (CER). The limited morphological features of Pelagiella conchs have led to the 'Pelagiella problem': (1) poorly distinguished Pelagiella species; (2) an exceptional genus range across all Cambrian palaeocontinents and climate belts; (3) an unparalleled genus-lifespan (c. 31 myr) in the early Palaeozoic; and (4)the assumption that all Pelagiella spp. are gastropods, which compromises lophotrochozoan and mollusc phylogenies. The type species P. atlantoides is a gastropod, but we show that so-called Pelagiella species with sub-to-triangular apertures and turbiniform conchs are not referable to the genus. Reevaluation of spectacular specimens of Pelagiella exigua Resser & Howell show it to be a polychaete with two apertural paleal chaetae fan arrays. Given that some modern sedentary polychaetes have paleal fan arrays, P. exigua is regarded as a likely member of the Sabellida Levinsen and is assigned to Pseudopelagiella gen. nov. Other Pelagiella spp. and forms with similar conchs are probably polychaetes not relevant to syntheses of early mollusc diversification. Pelagiellidae fam. nov. should be restricted to the late early Cambrian (c. 508 Ma) P. atlantoides. Pseudopelagiella exigua was unattached, probably benthic and lived with the apical conch surface on the sea floor, a mode of life similar to that of another family of the Sabellida, the sessile spirorbids that are cemented to substrate. Among numerous crown groups, the late early Cambrian eve of the CER included the polychaete Pseudopelagiella exigua and gastropod P. atlantoides.

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Systèmes de diverses classes d'animaux sans vertèbres. principalement de celles des côtes de l'Égypte et de la Syrie, offrant les caractères tant distinctifs que naturels des ordres, familles et genres, avec la description des espèces. Système des annelides (I)

Cited by 33 publications

References 0 publications

Polychaete systematics: Past and present

Polychaete systematics: Past and present

How false is Nereis falsa (Annelida, Phyllodocida, Nereididae)?

Lophotrochozoa in the Cambrian evolutionary radiation and the Pelagiella problem

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