Middle Ordovician actinocerid nautiloids (Cephalopoda) from Xainza County, Tibet, western China, and their paleogeographic implications

2018 ◽  
Vol 92 (3) ◽  
pp. 398-411 ◽  
Author(s):  
Xiang Fang ◽  
Tingen Chen ◽  
Clive Burrett ◽  
Yongsheng Wang ◽  
Yonggui Qu ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
New Species ◽  
North America ◽  
South China ◽  
North China ◽  
Western China ◽  
Middle Ordovician ◽  
Lhasa Terrane ◽  
First Time ◽  
The Himalaya

AbstractActinocerid nautiloids from the Lhasai Formation in the Xainza region are studied systematically for the first time. The nautiloids are identified as Middle Ordovician in age based on stratigraphic correlations with those from North China, Sibumasu, North Australia (northern Gondwana), and North America (Laurentia). A cluster analysis shows strong affinities between the actinocerid nautiloids of the Lhasa Terrane and those of the Himalaya, North China, and Sibumasu terranes. Our results support Middle Ordovician paleogeographic reconstructions that place North China rather than South China much closer to Australia. Nine species assigned to six genera of Meitanoceratidae, Wutinoceratidae, Armenoceratidae, Ormoceratidae, and Discoactinoceratidae are described in detail:Pomphoceras nyalamense(Chen, 1975),Pomphoceras yaliense(Chen, 1975),Wutinocerascf.W.foerstei(Endo, 1930),Mesowutinoceras giganteumChen in Chen and Zou, 1984,Armenoceras tani(Grabau, 1922),Armenoceras teichertiEndo, 1932,Armenoceras xizangensenew species,Deiroceras globosomZou and Shen in Chen and Zou, 1984, andDiscoactinocerascf.D.multiplexumKobayashi, 1927.UUID:http://zoobank.org/ba851fea-e107-4754-a0f4-a70744e325ab

Integrated conodont biostratigraphy and carbon isotope chemostratigraphy in the Lower–Middle Ordovician of southern Sweden reveals a complete record of the MDICE

2016 ◽  
Vol 154 (2) ◽  
pp. 334-353 ◽  
Author(s):  
RONGCHANG WU ◽  
MIKAEL CALNER ◽  
OLIVER LEHNERT
Keyword(s):  
North America ◽  
Carbon Isotope ◽  
South China ◽  
North China ◽  
Southern Sweden ◽  
Conodont Biostratigraphy ◽  
Middle Ordovician ◽  
The Core ◽  
Core Section ◽  
Argentine Precordillera

AbstractOne of the few and most complete records of the MDICE (Middle Darriwilian Isotope Carbon Excursion) is herein documented from Baltoscandia. Based on a core section penetrating the condensed Lower–Middle Ordovician succession (~46 m) on the island of Öland, southeastern Sweden, we provide an integrated scheme for carbon isotope chemostratigraphy (313 samples) and conodont biostratigraphy (29 samples) for this period. The carbonate succession in the Tingskullen core records 12 conodont zones and 6 subzones, including theOepikodus evae, Trapezognathus diprion, Baltoniodus triangularis, B. navis, B. norrlandicus, Lenodus antivariabilis, L. variabilis, Yangtzeplacognathus crassus, Eoplacognathus pseudoplanus(Microzarkodina hagetianaandMicrozarkodina ozarkodellasubzones),E. suecicus, Pygodus serra(E. foliaceus, E. reclinatus, E. robustusandE. lindstroemisubzones) andPygodus anserinuszones in ascending order. The δ13Ccarbrecord reveals an apparently complete record of the MDICE, including a rising limb, a well-defined peak and a falling limb. The anomaly covers a thickness ofc. 27 m in the core and spans theEoplacognathus pseudoplanus, E. suecicus, Pygodus serraandP. anserinusconodont zones. Combined with the new, detailed conodont biostratigraphy, the MDICE in the Tingskullen core can be used for detailed correlation with successions from Baltica, North America, the Argentine Precordillera, South China and North China.

Trilobites from the base of the type Whiterockian (Middle Ordovician) in Nevada

1999 ◽  
Vol 73 (2) ◽  
pp. 182-201 ◽  
Author(s):  
Richard A. Fortey ◽  
Mary L. Droser
Keyword(s):  
New Species ◽  
North America ◽  
Turning Point ◽  
Abrupt Change ◽  
Major Change ◽  
Species Level ◽  
Western North America ◽  
Middle Ordovician ◽  
First Time ◽  
Open Shelf

No trilobite species, and very few genera, pass from the Lower (Ibexian) into the Middle Ordovician (Whiterockian), which is a turning point in Laurentian trilobite history. Trilobites from three sections exposing the base of the Whiterock Series (basal Middle Ordovician) in Nevada are described and illustrated. They are attributable to different, and generally more open-shelf, biofacies from the Bathyurid biofacies trilobites described from the Ibex area, Utah, by Fortey and Droser (1996), but include species in common, which allow correlation into the Ibexian type section. At Little Rawhide Mountain the basal Middle Ordovician is developed in Olenid biofacies, described for the first time in western North America from rocks of this age. Correlation based on species-level similarity shows that the “spike” that has been used to define the type base of the Whiterockian (and hence the Middle Ordovician) at Whiterock Canyon is at a level younger than the base of the Whiterockian assumed in recent discussions of its international correlation. The type Whiterock base correlates with the Psephosthenaspis glabrior trilobite Subzone at Ibex, well above the major change in trilobite faunas at the base of the Psephosthenaspis Zone (P. microspinosa Subzone). In all study sections there is an abrupt change of facies after trilobite Zone J, possibly associated with regression. Four new species are described: Cloacaspis tesselata, Harpillaenus rossi, Acidiphorus? lineotuberculatus, and Benthamaspis serus.

Lower and Middle Ordovician Lithistid Demosponges from the Mingan Islands, Gulf of St. Lawrence, Quebec, Canada

1995 ◽  
Vol 69 (S41) ◽  
pp. 1-35 ◽  
Author(s):  
J. Keith Rigby ◽  
Andre Desrochers
Keyword(s):  
New Species ◽  
North America ◽  
Type Material ◽  
Eastern North America ◽  
Type Specimens ◽  
Middle Ordovician ◽  
First Time ◽  
Original Type

New collections, as well as original type material, of Lower and Middle Ordovician sponges from the Mingan Island Archipelago are described and figured from the Mingan and Romaine Formations. Archaeoscyphia minganensis (Billings, 1859), Hudsonospongia minganensis Raymond and Okulitch, 1940, H. irregularis Raymond and Okulitch, 1940, H. duplicata Raymond and Okulitch, 1940, Zittelella varians (Billings, 1861a), and Eospongia roemeri Billings, 1861, are redescribed from original type specimens and new collections. The species Archaeoscyphia pulchra (Bassler, 1927), Rhopalocoelia clarkii Raymond and Okulitch, 1940, Psarodictyum magnificum Raymond and Okulitch, 1940, and Lissocoelia ramosa Bassler, 1927 are reported and described from the Mingan Islands for the first time. To these sponges are added the new species Anthaspidella amplia, Archaeoscyphia undulata, Hudsonospongia nodosa, and Zittelella grossa, which are described from type specimens from the Mingan Formation.The assemblage from 12 localities from the Mingan Formation, and one from the Romaine Formation, represents one of the most diverse demosponge faunas from eastern North America. Sponges in most of the localities accumulated as transported debris or lag gravels, but locally, some grew in small reefoidal mounds and also accumulated as adjacent debris.

Darriwilian (Middle Ordovician) new trilobites from the Upper Yangtze Region, South China, and their macroevolutionary and paleobiogeographic implications

2021 ◽  
pp. 1-18
Author(s):  
Xin Wei ◽  
Zhi-Qiang Zhou ◽  
Ren-Bin Zhan ◽  
Rong-Chang Wu ◽  
Fang-Yi Gong ◽  
...  
Keyword(s):  
New Species ◽  
South China ◽  
North China ◽  
New Genus ◽  
New Genera ◽  
Middle Ordovician ◽  
Emended Diagnosis

Abstract Two new genera and six new species of trilobites are systematically documented herein: Sinagnostus mirabilis new genus new species, Yanpingia punctata n. gen. n. sp., Illaenus taoyuanensis n. sp., Panderia striolatus n. sp., Nileus yichongqiaoensis n. sp., and Paratiresias peculiaris n. sp. The materials were collected from the Darriwilian (late Middle Ordovician) strata in the Upper Yangtze Region, South China. Also provided is an emended diagnosis of the genus Paratiresias based on the new species Paratiresias peculiaris, which is the oldest known species of this genus with an extremely narrow (sag. and exsag.) preglabellar field. Those Chinese species previously referred to Nanillaenus are reassigned to Illaenus sensu lato. These trilobites add new data for the Darriwilian trilobite macroevolution and show highly endemic to South China and the faunal exchanges between South China and Tarim, Kazakhstan, Alborz, as well as Sibumasu and North China. UUID: http://zoobank.org/ec3be9be-b003-4367-910d-7a0ac4edc982

Procteria (Pachyprocteria) vermifera n. sp., an unusual Hicetes-bearing species of tabulate coral from the lower Eifelian of the Gaspé Sandstones Group, Rimouski County (Quebec, Canada)

2011 ◽  
Vol 48 (12) ◽  
pp. 1530-1542 ◽  
Author(s):  
Yves Plusquellec ◽  
Sylvain Desbiens ◽  
Rémy Gourvennec
Keyword(s):  
New Species ◽  
North America ◽  
Central Area ◽  
York River ◽  
Proximal Side ◽  
Unusual Association ◽  
Tabulate Coral ◽  
First Time

Procteria (Pachyprocteria) vermifera n. sp. is described from the upper part of the York River Formation (Gaspé Sandstones Group), lower Eifelian (brachiopod Amphigenia Zone), Rimouski County (Quebec, Canada). This new species is considered part of a new lineage of Pachyprocteria characterized by the presence of interstitial corallites. This study reveals for the first time that the granules on the lower (proximal) side are distributed irregularly, their density being higher in the central area of this side than at the periphery. The unusual association of the tabulate coral Procteria (Pachyprocteria) with the “worm” Hicetes is pointed out. The record of the new species adds to the known paleogeographic distribution of Pachyprocteria in North America (Laurussia).

Ant-like stone beetles on the roof of the world. Cephenniini of Nepal and Bhutan (Coleoptera, Staphylinidae, Scydmaeninae)

Zootaxa ◽  
2017 ◽  
Vol 4349 (1) ◽  
pp. 1 ◽  
Author(s):  
PAWEŁ JAŁOSZYŃSKI
Keyword(s):  
New Species ◽  
The World ◽  
Species Groups ◽  
First Time ◽  
The Himalaya ◽  
Himalaya Mountains

The tribe Cephenniini is for the first time reported to occur in the Himalaya Mountains, and 58 species are described: Cephennomicrus arunensis sp. n., Cm. acupunctatus sp. n., Cm. taplejungensis sp. n., Hlavaciellus primitivus sp. n., Cephennodes (s. str.) cavifrons sp. n., C. (s. str.) pampinosus sp. n., C. (s. str.) bagmatianus sp. n., C. (s. str.) popeye sp. n., C. (s. str.) clavodentatus sp. n., C. (s. str.) meredaranus sp. n., C. (s. str.) yangrianus sp. n., C. (s. str.) suturalis sp. n., C. (s. str.) karnaliensis sp. n., C. (s. str.) churtanus sp. n., C. (s. str.) sermathangensis sp. n., C. (s. str.) tipulipes sp. n., C. (s. str.) yeti sp. n., C. (s. str.) inflaticornis sp. n., C. (s. str.) dolakhanus sp. n., C. (s. str.) manangensis sp. n., C. (s. str.) martensi sp. n., C. (s. str.) paramartensi sp. n., C. (s. str.) monolaminatus sp. n., C. (s. str.) thakanus sp. n., C. (s. str.) annapurnaensis sp. n., C. (s. str.) parbatensis sp. n., C. (s. str.) letheanus sp. n., C. (s. str.) myagdiensis sp. n., C. (s. str.) malla sp. n., C. (s. str.) gorkha sp. n., C. (s. str.) tharepatianus sp. n., C. (s. str.) minisulcatus sp. n., C. (s. str.) mustangensis sp. n., C. (s. str.) lalitpuranus sp. n., C. (s. str.) paralalitpuranus sp. n., C. (s. str.) bahrabisensis sp. n., C. (s. str.) bilaminatus sp. n., C. (s. str.) ghorepanianus sp. n., C. (s. str.) cordilaminatus sp. n., C. (s. str.) mangmayanus sp. n. C. (s. str.) bilobatus sp. n., C. (s. str.) gokarnaensis sp. n., C. (s. str.) pseudogokarnaensis sp. n., C. (s. str.) mahisapala sp. n., C. (s. str.) licchavi sp. n., C. (s. str.) gopala sp. n., C. (s. str.) paniporuanus sp. n., C. (s. str.) brachyclavatus sp. n., C. (s. str.) phulchokianus sp. n., C. (s. str.) pokharensis sp. n., C. (s. str.) newar sp. n., C. (s. str.) kusunda sp. n., C. (s. str.) sindhupalchowk sp. n., C. (s. str.) furcatus sp. n., C. (s. str.) penicillipes sp. n., C. (s. str.) sulcatus sp. n., C. (s. str.) kalopanianus sp. n., and C. (s. str.) poonensis sp. n. Cephennodes popeye occurs in Bhutan; all remaining species inhabit Nepal. Four new species groups are established in Cephennodes, and a checklist of all Cephennodes species placed in species groups is given. The presumably plesiomorphic morphological structures of H. primitivus are discussed, and comparative notes on the Himalayan Cephenniini fauna are presented.  

Taxonomic review of the Sinopoda okinawana-group (Araneae: Sparassidae) in China

Zootaxa ◽  
2018 ◽  
Vol 4388 (3) ◽  
pp. 328 ◽  
Author(s):  
YANG ZHONG ◽  
PETER JÄGER ◽  
JIAN CHEN ◽  
JIE LIU
Keyword(s):  
New Species ◽  
Current Paper ◽  
Western China ◽  
Taxonomic Review ◽  
First Time ◽  
One New Species

Five Sinopoda species in the okinawana-group including one new species from central and south-western China are treated in the current paper: S. cochlearia Zhang, Zhang & Zhang, 2015, S. fasciculata Jäger, Gao & Fei, 2002, S. guangyuanensis sp. nov., S. hamata (Fox, 1937) and S. wangi Song & Zhu, 1999. The female of S. fasciculata is described for the first time. New province records are provided as well as photos of copulatory organs and habitus. 

Five new Lathys species (Araneae: Dictynidae) from South China and the first description of the male of Lathys spiralis Zhang, Hu & Zhang, 2012

Zootaxa ◽  
2018 ◽  
Vol 4500 (2) ◽  
pp. 151
Author(s):  
KEKE LIU ◽  
ZEYUAN MENG ◽  
YONGHONG XIAO ◽  
XIANG XU
Keyword(s):  
New Species ◽  
South China ◽  
Life Science ◽  
Nature Reserve ◽  
Jiangxi Province ◽  
Line Drawings ◽  
The Past ◽  
Animal Specimen ◽  
Science College ◽  
First Time

Dictynidae spiders were collected from Jinggang Mountain National Nature Reserve, Jiangxi Province, China in the past four years. Five new species are described and illustrated with photographs, SEMs and line drawings: Lathys adunca Liu spec. nov. (male), L. deltoidea Liu spec. nov. (female), L. fibulata Liu spec. nov. (female), L. huangyangjieensis Liu spec. nov. (male, female) and L. zhanfengi Liu spec. nov. (female). Both sexes of the species L. spiralis Zhang, Hu & Zhang, 2012 were collected from leaf litter in Jinggangshan University and the male is described for the first time. All specimens are deposited in the Animal Specimen Museum, Life Science College, at the Jinggangshan University (ASM-JGSU). 

Flexible crinoids from the Upper Ordovician Maquoketa Formation of the northern midcontinent and the evolution of early flexible crinoids

2001 ◽  
Vol 75 (2) ◽  
pp. 370-382 ◽  
Author(s):  
James C. Brower
Keyword(s):  
New Species ◽  
North America ◽  
Late Ordovician ◽  
Upper Ordovician ◽  
Middle Ordovician

Three flexible crinoids occur in the Upper Ordovician Maquoketa Formation of Illinois, Iowa, and Minnesota:Protaxocrinus girvanensisRamsbottom, 1961,Clidochirus anebosnew species, andProanisocrinus oswegoensis(Miller and Gurley, 1894).Protaxocrinus girvanensisis also found in the Upper Ordovician of Scotland which indicates that the ocean was narrow enough to allow at least one crinoid species to cross the barrier. The Upper Ordovician of North America and Scotland also share many common crinoid genera. Both phenetic and cladistic methods result in similar phylogenies of flexible crinoids.Protaxocrinuswas derived from a cupulocrinid ancestor during the Middle Ordovician.Clidochirusevolved fromProtaxocrinusor its ancestral stock prior to the Richmondian of the Late Ordovician. The RichmondianProanisocrinusand later anisocrinids are most closely related toClidochirusor its immediate predecessor. Thus, three major lineages of flexible crinoids,Protaxocrinus(taxocrinid group),Clidochirus(icthyocrinid), andProanisocrinus(anisocrinids and homalocrinids), appeared during the Ordovician. Despite their rarity during the Ordovician, all three flexible lineages survived the Latest Ordovician extinction, whereas their more abundant and successful cupulocrinid ancestors were eliminated.

Taxonomy of inquilines of oak gall wasps of Panama, with description of eight new species of Synergus Hartig (Hymenoptera, Cynipidae, Synergini)

Zootaxa ◽  
2011 ◽  
Vol 2774 (1) ◽  
pp. 1 ◽  
Author(s):  
JOSE LUIS NIEVES-ALDREY ◽  
ENRIQUE MEDIANERO
Keyword(s):  
Cluster Analysis ◽  
New Species ◽  
Single Species ◽  
Palaearctic Species ◽  
Gall Wasp ◽  
Gall Wasps ◽  
First Time

This paper reports the first study of the inquiline oak gall wasp fauna of Panama. Samples were collected at 19 sites in Panama, and inquiline specimens were reared from 63 gall morphotypes, including six species of Quercus, mainly Q. salicifolia and Q. bumelioides. Two genera were found: Synergus, represented by 10 species, and the recently described genus Agastoroxenia Nieves-Aldrey & Medianero, with a single species, A. panamensis Nieves-Aldrey & Medianero. Synergus was recorded for the first time in Panama; Synergus mesoamericanus and Synergus nicaraguensis, which were formerly recorded from Guatemala and Nicaragua, have now been recorded in Panama, and eight new species of Synergus are described here: Synergus elegans, S. laticephalus, S. ramoni, S. rufinotaulis, S. luteus, S. gabrieli, S. baruensis and S. chiricanus. A key for the identification of the studied fauna is provided. An overall similarity cluster analysis of the inquilines of oak gall wasps of Panama, including one Neotropical and two Palaearctic species as outgroups, is included.

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