19 research outputs found

    Oldest glosselline linguliform brachiopod with soft parts from the Lower Cambrian of Yunnan, Southern China

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    Lingulella chengjiangensis Jin, Huo & Wang, 1993 is one of the most abundant brachiopods from the celebrated Lower Cambrian Chengjiang Lagerstätte. A detailed study of abundant new well-preserved specimens clearly shows that their morphology and preserved soft anatomy differ widely from that of the linguliforms of the subfamily Obolinae, including Lingulella. L. chengjiangensis is herein re-described as the probable earliest member of the subfamily Glossellinae, which was previously known only from the Ordovician, and is referred to the new genus Eoglossa. Eoglossa chengjiangensis differs from species of Lingulella in lacking a dorsal pseudointerarea, having an elevated ventral proparea without flexure lines, and in the lack of pitting on the visceral areas of both valves. The detailed study of the exceptionally preserved specimens of E. chengjiangensis also reveals that it bears a unique musculature, which includes a single umbonal scar and a pair of posterolateral scars on each valve. The material of E. chengjiangensis also permits a more detailed study of the pedicle giving further insights into the early diversification and life habit of the linguliform brachiopods

    Oldest glosselline linguliform brachiopod with soft parts from the Lower Cambrian of Yunnan, Southern China

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    Lingulella chengjiangensis Jin, Huo & Wang, 1993 is one of the most abundant brachiopods from the celebrated Lower Cambrian Chengjiang Lagerstätte. A detailed study of abundant new well-preserved specimens clearly shows that their morphology and preserved soft anatomy differ widely from that of the linguliforms of the subfamily Obolinae, including Lingulella. L. chengjiangensis is herein re-described as the probable earliest member of the subfamily Glossellinae, which was previously known only from the Ordovician, and is referred to the new genus Eoglossa. Eoglossa chengjiangensis differs from species of Lingulella in lacking a dorsal pseudointerarea, having an elevated ventral proparea without flexure lines, and in the lack of pitting on the visceral areas of both valves. The detailed study of the exceptionally preserved specimens of E. chengjiangensis also reveals that it bears a unique musculature, which includes a single umbonal scar and a pair of posterolateral scars on each valve. The material of E. chengjiangensis also permits a more detailed study of the pedicle giving further insights into the early diversification and life habit of the linguliform brachiopods

    Textes vulgaires vieux en prose homiletiques et hagiologiques. (Neilos - Nathanael Bertos et anonyme du cod. 51 du Parlement des Grecs)

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    LES TEXTES VULGAIRES VIEUX EN PROSE HOMILETIQUES ET HAGIOLOGIQUES SONT DATES DEPUIS LE MILIEU DU 15EME SIECLE. L'ECRIVAIN SEMI-LETTRE NEILOS-NATHANAEL BERTOS COMPOSE DES PETITS TEXTES HOMILETIQUES, DE CONTENU MORAL, A L'USAGE PENDANT LA PERIODE DU CAREME EN UNE LANGUE QUI VISE-POUR LA LAIQUE TANDIS QU'ELLE EST INFLUEE PAR LES SAINTES ECRITURES ET DES TEXTES CHRYSOSTOMIENNES, COMME A PROUVE L'EXAMINATION DES 19 MSS QUI'ILS CONTIENT L'OEUVRE DE BERTOS. LES TEXTES DE L'ECRIVAIN ANONYME DU COD. 51 DU PARLEMENT DES GRECS SONT LA TRADUCTION EN LANGUE VULGAIRE DE TEXTES BYZANTINS PATRISTIQUES ET HAGIOLOGIQUES QUI ETAIENT UTILISES COMMME LECTURES PENDANT TOUTE LA PERIODE DE L'ANNEE ECCLESIASTIQUEΤΑ ΠΡΩΙΜΑ ΔΗΜΩΔΗ ΠΕΖΑ ΟΜΙΛΗΤΙΚΑ ΚΑΙ ΑΓΙΟΛΟΓΙΚΑ ΚΕΙΜΕΝΑ ΧΡΟΝΟΛΟΓΟΥΝΤΑΙ ΠΕΡΙ ΤΑ ΜΕΣΑ ΤΟΥ 15ΟΥ ΑΙΩΝΑ. Ο ΗΜΙΛΟΓΙΟΣ ΣΥΓΓΡΑΦΕΑΣ ΝΕΙΛΟΣ - ΝΑΘΑΝΑΗΛ ΜΠΕΡΤΟΣ ΣΥΝΘΕΤΕΙ ΜΙΚΡΑ ΟΜΙΛΗΤΙΚΑ ΚΕΙΜΕΝΑ ΗΘΙΚΟΛΟΓΙΚΟΥ ΠΕΡΙΕΧΟΜΕΝΟΥ ΠΡΟΣ ΧΡΗΣΗ ΚΑΤΑ ΤΗΝ ΠΕΡΙΟΔΟ ΤΗΣ Μ. ΤΕΣΣΑΡΑΚΟΣΤΗΣ ΣΕ ΜΙΑ ΓΛΩΣΣΑ ΠΟΥ ΤΕΙΝΕΙ ΠΡΟΣ ΤΗ ΔΗΜΩΔΗ, ΕΝΩ ΕΙΝΑΙ ΕΠΗΡΕΑΣΜΕΝΗ ΑΠΟ ΤΗΝ ΑΓΙΑ ΓΡΑΦΗ ΚΑΙ ΧΡΥΣΟΣΤΟΜΙΚΑ ΚΕΙΜΕΝΑ, ΟΠΩΣ ΑΠΕΔΕΙΞΕ Η ΕΞΕΤΑΣΗ ΤΩΝ 19 ΧΦΦ, ΠΟΥ ΠΕΡΙΕΧΟΥΝ ΤΟ ΕΡΓΟ ΤΟΥ ΜΠΕΡΤΟΥ. ΤΑ ΚΕΙΜΕΝΑ ΤΟΥ ΑΝΩΝΥΜΟΥ ΣΥΓΓΡΑΦΕΑ ΤΟΥ ΚΩΔ. 51 ΤΗΣ ΒΟΥΛΗΣ ΤΩΝ ΕΛΛΗΝΩΝ ΕΙΝΑΙ ΜΕΤΑΦΡΑΣΕΙΣ ΣΕ ΓΛΩΣΣΑ ΔΗΜΩΔΗ ΚΕΙΜΕΝΩΝ ΒΥΖΑΝΤΙΝΩΝ ΠΑΤΕΡΙΚΩΝ ΚΑΙ ΑΓΙΟΛΟΓΙΚΩΝ ΠΟΥ ΧΡΗΣΙΜΟΠΟΙΟΥΝΤΑΝ ΩΣ ΑΝΑΓΝΩΣΜΑΤΑ ΚΑΘ'ΟΛΗ ΤΗΝ ΠΕΡΙΟΔΟ ΤΟΥ ΕΚΚΛΗΣΙΑΣΤΙΚΟΥ ΕΝΙΑΥΤΟΥ

    First report of linguloid brachiopods with soft parts from the lower Cambrian (Series 2, Stage 4) of the Three Gorges area, South China

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    Abstract Chengjiang-type fossil brachiopods with preservation of non-mineralized tissues are reported for the first time from the Lower Cambrian Shipai Formation of the Three Gorges area, western Hubei Province, China. Recent excavation in the Wangjiaping and Aijiahe sections resulted in the new discovery of some linguloid brachiopods, showing strong similarity in preservation with those occurring in the well-known Chengjiang fauna (Yu’anshan Formation of eastern Yunnan, China). The brachiopods can be referred to Palaeobolus liantuoensis, Lingulellotreta malongensis and Eoobolus. sp. The new material of Palaeobolus exhibits a flattened impression of proximal pedicle, which also represents the first report of pedicle known from this cosmopolitan linguloid taxon. The occurrence of Lingulellotreta in the Shipai Formation (Redlichia meitanensis and Palaeolenus lantenoisi zones) represents an important geological extension of this genus to upper Tsanglangpuan Stage (Series 2, Stage 4) in the Yangtze Platform, and signifying that the FAD of Lingulellotreta in the regional Lower Cambrian of the Yangtze Platform seems not synchronous

    Oldest mickwitziid brachiopod from the Terreneuvian of southern France

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    Kerberellus marcouensis Devaere, Holmer, and Clausen gen. et sp. nov., originally described as Dictyonina? sp., from the Terreneuvian of northern Montagne Noire (France) is reinterpreted as the oldest relative to or member of mickwitziid-like stem-group brachiopods. Were extracted 170 partial to complete phosphatic internal moulds of two types of adult and one type of juvenile disarticulated valves, rarely externally coated with phosphates, from the calcareous Heraultia Member of the Marcou Formation. They correspond to microbially infested, ventribiconvex, inequivalved, bivalved shells. The ventral interarea is bisected by a triangular sinus. The shell, most probably dominantly organic in origin, is orthogonally pierced throughout its entire thickness by radially-aligned, smooth-walled, cylindrical to hourglass shaped canals except for the sub-apical planar field (interarea). The through-going canals of K. marcouensis are compared with brachiopods endopunctae and with canals of mickwitziid brachiopods. The absence of striations on K. marcouensis canal walls, typical of mickwitziids, implies that (i) the tubes could have been depleted of setae or; (ii) traces of the microvilli were not preserved on the tube wall (taphonomic bias) or, (iii) the tubes could have been associated with an outer epithelial follicle

    First record of the brachiopod Lingulella waptaensis with pedicle from the Middle Cambrian Burgess Shale

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    The organophosphatic shells of linguloid brachiopods are a common component of normal Cambrian-Ordovician shelly assemblages. Preservation of linguloid soft-part anatomy, however, is extremely rare, and restricted to a few species in Lower Cambrian Konservat Lagerstatten. Such remarkable occurrences provide unique insights into the biology and ecology of early linguloids that are not available from the study of shells alone. Based on its shells, Lingulella waptaensis Walcott, was originally described in 1924 from the Middle Cambrian Burgess Shale but despite the widespread occurrence of soft-part preservation associated with fossils from the same levels, no preserved soft parts have been reported. Lingulella waptaensis is restudied herein based on 396 specimens collected by Royal Ontario Museum field parties from the Greater Phyllopod Bed (Walcott Quarry Shale Member, British Columbia). The new specimens, including three with exceptional preservation of the pedicle, were collected in situ in discrete obrution beds. Census counts show that L. waptaensis is rare but recurrent in the Greater Phyllopod Bed, suggesting that this species might have been generalist. The wrinkled pedicle protruded posteriorly between the valves, was composed of a central coelomic space, and was slender and flexible enough to be tightly folded, suggesting a thin chitinous cuticle and underlying muscular layers. The nearly circular shell and the long, slender and highly flexible pedicle suggest that L. waptaensis lived epifaunally, probably attached to the substrate. Vertical cross-sections of the shells show that L. waptaensis possessed a virgose secondary layer, which has previously only been known from Devonian to Recent members of the Family Lingulidae

    The diversity and phylogeny of the paterinate brachiopods

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    The chemico-structure and morphology of the shells of the earliest known brachiopods, the paterinates, have many features consistent with the antiquity of the group and its phylogenetic proximity to the ancestral stock of the phylum. The organophosphatic shell is typically finely laminated and imprinted throughout with outwardly convex epithelial casts in the older cryptotretids. The greatest concentration of amino acids occurs in the shells of Ordovician Dictyonites but the higher level of aspartic acid/asparagine may not be related exclusively to the post-Cambrian age of the genus as the shell is uniquely 'perforate' through periodic reductions in phosphatic secretion. The quadrilobate larval dorsal valve, the interareas with delthyria and notothyria variably covered by homeodeltidia (or pseudodeltidia in some cryptotretids) and rarer homeochilidia suggest rhynchonelliform affinities as do mantle canal impressions and a musculature which included diductors implanted dorsally on the median plate within the notothyrium. Phylogenetic analysis with penecontemporaneous linguliforms and rhynchonelliforms as outgroups indicates that the paterinates are a sister group of the lingulates and consist of two subclades, Paterinidae and Cryptotretidae. The latter were short lived but remarkably diverse and may well have evolved directly from the brachiopod stem group
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