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1.
Nouveaux brachiopodes Chonetacea du Dévonien de la Cordillère cantabrique (Nord-Ouest d e l'Espagne)
The study of Chonetacean Brachiopods from Cantabrian Mountains allows to recognize several new taxa restricted to this area. A new genus and seven species of which six are new, are described in this paper; their vertical distribution is from Gedinnian to Upper Givetian: Chonetes bediae n. sp., Chonetes? kerforneiRenaud, 1942, Plebejochonetes coliensis n. sp., Plebejochonetes moniellensis n. sp., Luanquella cantabriensis n. g., n. sp., Plicanoplia sotoi n. sp. et Longispina truyolsi. n. sp. The species kerfornei, from the Middle Devonian of Armorican Massif is cited here for the first time from Spain. 相似文献
2.
The bradoriid genusHipponicharion
Matthew, 1886 is one of the oldest known Cambrian ostracods. Until now, five species have been documented and another three taxa
have been tentatively assigned to one or another species.Hipponicharion has been recorded from Poland, Germany, Morocco as well as from Canada and Great Britain.Hipponicharion hispanicum n. sp. represents the first Cambrian ostracod documented from Spain.Hipponicharion taidaltensis n. sp., formerlyH. aff.geyeri
Hinz-Schallreuter, 1993 andH. elickii n. sp., formerlyH. cf.eos sensuElicki, 1994 have also been restudied in this paper.Hipponicharion seems to be restricted to the Acadobaltic Province sensuSdzuy (1972). The systematic relationships of the Bradoriida, which is controverse, is briefly outlined, emphasizing close affinities
to the Ostracoda.
相似文献
3.
A small crustacean with extremely long anterodorsal spines occurs in the Middle Cambrian of the western part of the Georgina Basin. It is assigned to the new genusGladioscutum (type speciesG. lauriei n. sp.), and is described from a sample collected from the Arthur Creek Formation, in the Huckitta area of the Northern Territory. The carapaces, preserved as flattened, outspread valves on the surface of finely laminated, dark grey micritic limestone, are comparable with those of Archaeocopida and Archaeostraca. On the basis of gross carapace morphology, an archaeocopid relationship is preferred. 相似文献
4.
From nearshore Upper Oligocène sediments of the coal mine of Sophia Jacoba (SW Erkelenz, NRW), the ostracodeEchinocythereis Symmetrien n. sp., family Trachyleberididae Sylvester-Bradley 1948 is described. 相似文献
5.
贵州早、中寒武世斗篷海绵科(Choiidae)的发现 总被引:4,自引:3,他引:4
本文描述了贵州遵义下寒武统牛蹄塘组生物群和台江中寒武世凯里生物群中保存完整的斗篷海绵科(Choiidae)中斗篷海绵(Choia)和小斗篷海绵(Choiaella)化石标本,共计2属2种2未定种:Choia zunyiensis sp.nov.,Choia sp.,Choiaella avata sp.nov.和Choiaella sp.。Choia分布很广.在我国下寒武统澄江生物群及北美中寒武统的四大生物群中均有产出。Choiaella原仅产于我国澄江生物群,凯里生物群中Choiaella的发现使其时代上延至中寒武世。贵州早、中寒武世斗篷海绵科的发现及研究为海绵动物的早期演化及古地理学等方面的研究提供了重要的新材料。 相似文献
6.
by MICHAEL J. VENDRASCO SUSANNAH M. PORTER† ARTEM KOUCHINSKY‡ GUOXIANG LI§ CHRISTINE Z. FERNANDEZ¶ 《Palaeontology》2010,53(1):97-135
Abstract: Numerous new cases of preserved shell microstructure were discovered in molluscs from the Middle Cambrian Gowers Formation (Ptychagnostus atavus/Peronopsis opimus Zone, Floran Stage) in the Georgina Basin, Australia. The new data provide further evidence that, by the Middle Cambrian, molluscan shell microstructures were diverse, and many molluscs had a complex shell with multiple types of shell microstructure. In addition, many new occurrences of laminar microstructures are described herein. For many, the nature of these laminar microstructures is not known, but in three species the microstructure is foliated calcite, and in at least two the microstructure is more likely to have been calcitic semi‐nacre, a type of microstructure known in brachiopods and bryozoans but unknown in modern molluscs. This commonality among these three closely related lophotrochozoans underscores a similar mechanism of biomineralization. Moreover, these observations suggest a prevalence of calcite‐shelled lineages among molluscs from the Middle Cambrian, a time of calcite seas. In addition, the broad occurrence of laminar, nacre‐like microstructures in many of these fossils reveals how widespread these strong (fracture‐resistant) microstructures were in Middle Cambrian molluscs. Additionally, a few specimens of Yochelcionella preserve imprints of a bilaterally symmetrical pair of muscle scars. New taxa described here include Corystos thorntoniensis gen. et sp. nov., Yochelcionella snorkorum sp. nov., Yochelcionella saginata sp. nov., and Anhuiconus? agrenon sp. nov. 相似文献
7.
河南叶县下寒武统辛集组单板类和腹足类化石的研究 总被引:5,自引:3,他引:5
本文描述和讨论了河南叶县杨寺庄下寒武统辛集组单板类13种,腹足类2种,未定类1种。其中包括2新属6新种:Repenoconus xinjiensis gen.nov.,Scenella pycna sp.nov.,Securiconus vulgaris sp.nov.,Obtusocnus grossicostus sp.nov.,Igorellina proboscis sp.nov.,Gal 相似文献
8.
The core of borehole 1209/78 west of Doberlug–Kirchhain and south of Herzberg in the Torgau–Doberlug Syncline records an atypical lower part of the Tröbitz Formation with thin limestone horizons. These limestone layers include the remains of a low to moderately diverse fauna with the trilobites Protolenus (Hupeolenus) bergstroemi n. sp., Cambrunicornia saxonica n. sp., Ornamentaspis? aff. todraensis Geyer 1990a, Calodiscus? n. sp., the remains of two undetermined olenelloid? and paradoxidid? species, at least two brachiopods (Trematobolus, undetermined acrotretoid), and one hyolith. The fauna clearly suggests a position in the lower Agdzian stage of the West Gondwana chronostratigraphic scheme and correlation with the lowermost to lower Middle Cambrian strata in regions such as the Moroccan Atlas ranges and northern Spain, so the assemblages represent the oldest Middle Cambrian fauna known from the Saxothuringian domain and reconfirm the palaeogeographic position in the Perigondwanan segment. The lithological differences of the fossiliferous cores from those of the typical Tröbitz Formation and the recorded high-energy conditions indicate high-frequency sea-level changes suggesting that this part of the succession may be a late stage of the subglobally recognizable eustatic sea-level fluctuations at the traditional Lower–Middle Cambrian boundary interval. 相似文献
9.
Abstract: A medium diversity silicified Middle Cambrian faunal assemblage occurs in an olistolith of bioclastic limestone within Silurian siliciclastic turbidites on the slopes of Arpatektyr Mountain in the eastern Alai Range, Kyrgyzstan. The fauna includes the trilobites Raragnostus cf. mirus , Altikolia kurshabica sp. nov., Corynexochina weberi , Dorypyge richthofeniformis , aff. Jincella sp., Olenoides comptus , Skreiaspis aff. spinosus and Suluktella mambetovi sp. nov. Three of these taxa ( C . weberi , O . comptus and R . cf. mirus ) are considered locally to be characteristic of the Pseudanomocarina Beds, although Pseudanomocarina itself is not present. Altikolia and Suluktella are endemic to early Palaeozoic terranes of Central Asia, Corynexochina also occurs in South China and Skreiaspis is known elsewhere exclusively from the Middle Cambrian of 'West' Gondwana. Because of preservation in full relief, the silicified trilobite fauna allows a detailed understanding of some morphological structures, related especially to trilobite enrolment, otherwise inadequately known for many Mid-Cambrian polymerid trilobites. 相似文献
10.
文中描记 3个多节类三叶虫新种 :Hardyoidesdamaensissp .nov .,Meringaspisdamaensissp .nov .,andRhyssometopus (Rostrifinis)nitidussp .nov .,均产自湘西凤凰花桥组中部。同时描记首次在江南斜坡带中发现的Erixanium一属的保留命名种Erixaniumcf.E .sentum。Erixanium是全球性分布的多节类三叶虫 。 相似文献
11.
The gills of two species of Siluriformes, Heterobranchus longifilis and H. isopterus collected from the Rivers Agnéby and Bia in the Ivory Coast (West Africa) revealed the presence of seven new species of Quadriacanthus Paperna, 1961 (Monogenea: Ancyrocephalidae). The following parasites are described: Quadriacanthus longifilisi n. sp., Q. thysi n. sp., Q. ayameensis n. sp., Q. agnebiensis n. sp., Q. simplex n. sp., Q. gourenei n. sp. and Q. macrocirrus n. sp. 相似文献
12.
Antonín Vězda 《Folia Geobotanica》1979,14(1):43-94
In der vorliegenden Studie werden dieAsterothyriaceae allgemein charakterisiert. Es wird nachgewiesen, dass auch die GattungenAulaxina Fée,Gomphillus Nyl. undSolorinella Anzi Glieder der Familie sind. Morphologie und Bedeutung der Hyphophoren—asexuelle Fruchtkörper der Mycobionten—und den Hyphophoren homologen, ertmalig beschriebenen Pseudisidien werden behandelt. Eine taxonomische Gruppierung der zur Familie gehörenden Gattungen wird vorgenommen. Ferner wird eine kurze systematische Übersicht der Gattungen der Asterothyriaceen gegeben und durch Bestimmungsschlüssel ergänzt. Folgende neue Taxa werden im einzelnen aufgestellt:Calenia microcarpa sp. n.,C. monospora sp. n.,Gyalideopsis alnicola Noble etVězda sp. n.,G. bispora sp. n.,G. lambinonii sp. n.,G. ochroleuca sp. n.,G. perminuta sp. n.,G. philippiae sp. n.,G. rubescens sp. n.,G. solorinellaeformis sp. n.,Tricharia cretacea sp. n.,T. pallida sp. n.,T. plana sp. n.,T. similis sp. n. undT. substipitata sp. n. 相似文献
13.
Lothar Geitler 《Plant Systematics and Evolution》1970,118(1-2):17-29
Zusammenfassung Es werden aus dem Neusiedler See eine neue Cyanophycee,Chamaesiphon subaequalis n. sp., eine neue Chrysotrichale,Apistonema expansum n. sp., und eine neue Rhodophycee,Porphyridium griseum n. sp. beschrieben. Außerdem werden einige Beobachtungen an anderen Algen des Aufwuchses mitgeteilt. 相似文献
14.
15.
Ten specimens of two phosphatic fossils have been recently discovered in lower and middle portions of Middle Cambrian Jince Formation in the Czech Republic. They are attributed to the genus Sphenothallus Hall, 1847 and described as two separate species; comparatively small conchs are described as S. kozaki sp. nov., the much larger specimens characterized by its smooth and partly flexible organo-phosphatic walls of shell are determined as ?S. kordulei sp. nov. Sphenothallus is known to range from Cambrian to Permian and accommodates numerous species. However, its Cambrian distribution is considerably restricted. Generally rare specimens have been described from Lower to Middle Cambrian of Laurentia and from the Lower Cambrian of Gondwana and peri-Gondwana. The new record of Sphenothallus from the Jince Biota represents a notable extension of their geographic range. 相似文献
16.
Middle Cambrian monoplacophorans from Bornholm and Australia, and the systematic position of the bellerophontiform molluscs 总被引:1,自引:0,他引:1
VIVIANNE BERG-MADSEN JOHN S. PEEL 《Lethaia: An International Journal of Palaeontology and Stratigraphy》1978,11(2):113-125
Berg-Madsen, Vivianne & Peel, John S. 1978 04 IS: Middle Cambrian monoplacophorans from Bornholm and Australia, and the systematic position of the bellerophontiform molluscs
Minute Middle Cambrian monoplacophorans originally reported from Australia are redescribed on the basis of material from the Kalby Clay of Bornholm. A recent classification of Bellerophon. Sinuites and related genera as monoplacophorans is discussed and rejected. Members of the group are returned to the Gastropoda on account of their similarity in ornament, musculature and inferred water circulation patterns, with contemporary fossil helically coiled gastropods. Water circulation patterns are deduced in Protowenella flemingi and support the assignment to the Monoplacophora. Kulhyella poulseni n.gen. n.sp. is described. 相似文献
Minute Middle Cambrian monoplacophorans originally reported from Australia are redescribed on the basis of material from the Kalby Clay of Bornholm. A recent classification of Bellerophon. Sinuites and related genera as monoplacophorans is discussed and rejected. Members of the group are returned to the Gastropoda on account of their similarity in ornament, musculature and inferred water circulation patterns, with contemporary fossil helically coiled gastropods. Water circulation patterns are deduced in Protowenella flemingi and support the assignment to the Monoplacophora. Kulhyella poulseni n.gen. n.sp. is described. 相似文献
17.
Polymeroid trilobite fauna from two stratigraphic sections (Godbondar and Kuhbanan) of the Kuhbanan Formation in northern Kerman (central Iran) were studied and subjected to biostratigraphic analysis. Eleven genera and species are recognised from the latest Early Cambrian and Middle Cambrian Peri-Gondwanian successions of the study sections. The recognised fauna includes Afghanocare lategenatum, Blountia blountia, Iranoleesia sp., Iranoleesia pisiformis, Kermanella kuhbananensis, Kermanella lata lata, Kermanella lata minuta, Kermanella sp., Redlichia chinensis, Redlichia noetlingi and Redlichia sp. Based on trilobite distribution, three trilobite biozones were recognised in the study sections, namely Redlichia noetlingi biozone, Kermanella kuhbananensis biozone and Iranoleesia pisiformis biozone. The age of the study sections is late Early Cambrian to late Middle Cambrian based on the recognised trilobite biozones. The recognised late Early Cambrian trilobite assemblages (especially Redlichia and Kermanella) from northern Kerman are similar to those found from some other parts of Gondwana or Peri-Gondwana terrains (north India, Pakistan, northwestern Kashmir, Tajikistan, South Australia, South China and Afghanistan) and show affinities with fauna found in some other parts of Iran (Alborz, northern Iran; Tabas, eastern Iran; southeast Karman). 相似文献
18.
Four new brachiopod species from the order Acrotretida (class Lingulata): Picnotreta saryarkensis sp. nov., Stilpnotreta propria sp. nov., Anabolotreta firma sp. nov., and Batenevotreta variabilis sp. nov. are described from the Agyrek Mountains, northeastern Central Kazakhstan from two olistoliths of limestones, which
contain the uppermost Middle and lowermost Upper Cambrian fauna and are located in the Upper Ordovician olistostrome. These
new species supplement the described earlier brachiopod assemblage from this region (Koneva and Ushatinskaya, 2008). Strong
age and intraspecific variability of some Kazakh acrotretids is shown. 相似文献
19.
Antonín Vězda 《Folia Geobotanica》1980,15(1):75-94
In dieser Arbeit wird über 3Catillaria- und 19Bacidia-Arten berichtet, die in einer Kollektion foliicoler Flechten aus Zaïre festgestellt wurden. Von diesen werden folgende Arten als neu beschrieben:Catillaria encephalarti sp. n.,C. mirabilis sp. n.,Bacidia ituriensis sp. n.,B. lisowskii sp. n.,B. sorediantha sp. n. undB. wirthii sp. n. Erstmalig in Afrika werdenBacidia dimidiata (Babingt.) R. Sant. undB. micrommata (Krempelh.) R. Sant. nachgewiesen. Auf dem aus Goniocysten bestehenden Lager vonCatillaria mirabilis (sp. n.) kommen soralähnliche Goniocystangien vor; diese bei Flechten zuvor erst einmal beobachteten Vermehrungsorgane werden näher, behandelt. Ein Bestimmungsschlüssel aller bisher bekannten foliicolenCatillaria-Arten sowie Ergänzungen zu dem früber publizierten Schlüssel für afrikanische foliicoleBacidia-Arten werden vorgelegt. 相似文献
20.
Chandacleidus n. g. (Monogenea, Dactylogyridae) is proposed to include three species collected from the gills of Indian glassfishes (Ambassidae): Chandacleidus recurvatus (Jain, 1961) n. comb. (syn. Urocleidus recurvatus Jain, 1961) from Chanda nama and C. ranga (new host record) is redescribed; and Chandacleidus saiensis n. sp. and C. lucknowensis n. sp., both from Chanda nama and C. baculis, are described. Chandacleidus n. g. is characterised by species possessing: posteriorly united intestinal caeca; overlapping gonads (testis dorsal to ovary); a counterclockwise male copulatory organ; a grooved accessory piece; a dextro-marginal vaginal pore; a haptor with two lateral flaps and armed with dissimilar dorsal and ventral anchor/bar complexes and 14 similar hooks (dissimilar in size); and hook shanks comprised of two subunits. 相似文献