Stratigraphic and Paleogeographic Significance of An Upper Ordovician Acritarch Flora from the Maquoketa Shale, Northeastern Missouri, U.S.A.

1999 ◽  
Vol 73 (S51) ◽  
pp. 1-38 ◽  
Author(s):  
Reed Wicander ◽  
Geoffrey Playford ◽  
Eddie B. Robertson
Keyword(s):  
New Species ◽  
North America ◽  
Type Species ◽  
Low Energy ◽  
New Genera ◽  
Upper Ordovician ◽  
Important Species ◽  
Maquoketa Shale

A well-preserved and moderately diverse acritarch assemblage was recovered from the upper Ordovician Maquoketa Shale of northeastern Missouri. Based on graptolite and conodont evidence, the Maquoketa in northeastern Missouri is considered Richmondian (=Ashgill) in age.The acritarch assemblage comprises 28 species, distributed among 17 genera including two new genera,CaelatosphaeraandStictosoma.There are 11 new species,Baltisphaeridium adiastaltum, Caelatosphaera verminosa(type species),Dorsennidium undosum, Elektoriskos aktinotos, Lophosphaeridium acinatum, L. varum, Micrhystridium hirticulum, M. prolixum, Peteinosphaeridium accinctulum, P. septuosum, andStictosoma gemmata(type species); together with two species similar to previously named species and three species left in open nomenclature. Cosmopolitan and stratigraphically important species identified includeBaltisphaeridium perclarumLoeblich and Tappan, 1978;Cheleutochroasp. cf.C. diaphorosaTurner, 1984;Dorsennidium hamii(Loeblich, 1970) Sarjeant and Stancliffe, 1994;Excultibrachium concinnumLoeblich and Tappan, 1978;Orthosphaeridium insculptumLoeblich, 1970;O. rectangulare(Eisenack, 1963) Eisenack, 1968, andVillosacapsula setosapellicula(Loeblich, 1970) Loeblich and Tappan, 1976.Polygonium gracileVavrdová, 1966 emend. Sarjeant and Stancliffe, 1994 andMicrhystridium hirticulumnew species dominate the assemblage, followed byDorsennidium undosumnew species,Baltisphaeridium oligopsakiumLoeblich and Tappan, 1978,Veryhachiumsp. cf.V. oklahomenseLoeblich, 1970,Peteinosphaeridium accinctulumnew species, andLophosphaeridium acinatumnew species. Additionally, the palynoflora contains chitinozoans, scolecodonts, cryptospores, and the enigmatic palynomorphGloeocapsomorpha priscaZalessky, 1917 emend. Foster, Reed, and Wicander, 1989.Paleontologic-palynologic and sedimentologic evidence indicates that the Maquoketa Shale at the two studied localities accumulated under low energy, somewhat offshore, and unrestricted marine conditions. The present Maquoketa Shale acritarch palynoflora shows greatest similarity to those of the Sylvan Shale (Ashgill; Richmondian) of Oklahoma and the Maquoketa Shale (Caradoc and Ashgill) of Kansas. Whereas there are some cosmopolitan acritarch species present in the Maquoketa Shale, its palynoflora shows no pronounced similarity with age-equivalent acritarch suites from outside of North America.

Element morphology and taxonomic relationships of the Ordovician conodonts Phragmodus primus Branson and Mehl, 1933, the type species of Phragmodus Branson and Mehl, 1933, and Phragmodus undatus Branson and Mehl, 1933

1995 ◽  
Vol 69 (5) ◽  
pp. 967-974 ◽  
Author(s):  
Stephen A. Leslie ◽  
Stig M. Bergström
Keyword(s):  
New Species ◽  
Special Interest ◽  
Type Species ◽  
The Other ◽  
New Genera ◽  
Upper Ordovician ◽  
Middle Ordovician ◽  
Taxonomic Relationships ◽  
Morphological Differences ◽  
Stratigraphic Range

Rediscovery of Branson and Mehl's (1933b) classical outcrop of the Middle Ordovician Joachim Dolomite near Holstein in eastern Missouri, from which they described 32 new species and four new genera of conodonts, makes it possible to obtain the large topotype collections needed to interpret their taxa in terms of modern multielement taxonomy. Of special interest in their Holstein fauna is Phragmodus primus Branson and Mehl, 1933, by original designation the type species of Phragmodus Branson and Mehl, 1933, whose morphology and relationships have been very poorly understood. Study of topotype collections, as well as of Branson and Mehl's syntypes, has failed to reveal any notable morphological differences between the elements of P. primus and those of P. undatus Branson and Mehl, 1933, a very well known and widely distributed species in the Middle and Upper Ordovician Midcontinent Realm faunas. These species are herein considered to be synonymous. Because the original descriptions of P. primus and P. undatus were published simultaneously, neither name has priority over the other. However, P. undatus has figured far more prominently in the taxonomic and biostratigraphic conodont literature than P. primus and therefore we favor use of the former designation for this species. The recognition that P. primus and P. undatus are the same species extends the stratigraphic range of P. undatus downward to considerably below the Deicke K-bentonite, that is, well into the Blackriveran.

Revision of the Balanid Barnacle Genus Concavus Newman, 1982, with the Description of a New Subfamily, Two New Genera, and Eight New Species

1992 ◽  
Vol 66 (S27) ◽  
pp. 1-46 ◽  
Author(s):  
Victor A. Zullo
Keyword(s):  
New Species ◽  
North America ◽  
Type Species ◽  
Middle Miocene ◽  
Species Group ◽  
New Genera ◽  
Central California ◽  
Upper Miocene ◽  
Extant Species ◽  
Southern Florida

The new balanid subfamily Concavinae is based on the genus Concavus Newman, 1982, and includes five genera and 29 species-group taxa. The subgenera Concavus, Tamiosoma Conrad, 1856 (senior synonym of Menesiniella Newman, 1982), and Arossia Newman, 1982, are raised to generic rank. Two new genera, Chesaconcavus (type species Balanus concavus chesapeakensis Pilsbry, 1916) and Paraconcavus (type species Balanus concavus pacificus Pilsbry, 1916), are proposed, based on fossil and extant species from North America. New species include Tamiosoma advena from the Pliocene of southern Florida, Chesaconcavus rossi and C. santamaria from the middle Miocene of Maryland, C. myosulcatus from the upper Miocene of Virginia, Arossia newmani from the middle Miocene of Maryland, A. rubra from the upper Miocene of central California, A. aurae from the lower Pliocene of North Carolina, and Paraconcavus margaritanus from the upper Miocene of southern California. Concavines, a predominantly Northern Hemisphere group, appear in the late Oligocene in North America and Europe, diversify and spread rapidly in the Neogene, and, with the exception of a few eastern Pacific relicts, become extinct before the late Pleistocene.

The millipede family Conotylidae in northwestern North America, with a complete bibliography of the family (Diplopoda, Chordeumatida, Heterochordeumatidea, Conotyloidea)

Zootaxa ◽  
2020 ◽  
Vol 4753 (1) ◽  
pp. 1-78
Author(s):  
WILLIAM A. SHEAR ◽  
CASEY H. RICHART ◽  
VICTORIA L. WONG
Keyword(s):  
New Species ◽  
North America ◽  
Type Species ◽  
New Genera ◽  
The Family ◽  
The World ◽  
Center Of Diversity ◽  
Complete Bibliography ◽  
Northwestern North America ◽  
New Distribution

The center of diversity for the chordeumatidan millipede family Conotylidae is northwestern North America, where five of six subfamilies and ten of fourteen previously described genera occur; in this paper, seven additional new genera and 33 new species from the region are described. New species in the genus Taiyutyla Chamberlin, 1952 are: Taiyutyla tillamook, Taiyutyla acuphora, and Taiyutyla amicitia; in the genus Bollmanella Chamberlin, 1941: Bollmanella bombus, Bollmanella washingtonensis and Bollmanella leonardi; in the genus Brunsonia Loomis & Schmitt, 1971: Brunsonia pulchra, Brunsonia digitata, Brunsonia wenatchee, Brunsonia chelanoparva, Brunsonia chelanomagna, Brunsonia selwayana and Brunsonia benewah. Vancouvereuma n. gen. is described with the type species Taiyutyla shawi Shear 2004. Calityla n. gen. includes the new species Calityla siskiyou, Calityla ubicki, Calityla trinitaria, Calityla essigi, and Calityla humboldtensis. Ovaskella, n. gen. includes the new species Ovaskella ovaskae and Ovaskella sinuosa. Karagama, n. gen. includes the new species Karagama ladybird. Complicatella, n. gen. includes the new species Complicatella pectenifera and Complicatella neili. Bifurcatella n. gen. includes the new species Bifurcatella olympiana, Bifurcatella hoh, Bifurcatella angulata, Bifurcatella pacifica, Bifurcatella germania, Bifurcatella uniclada, Bifurcatella inflata and Bifurcatella hobo. Loomisiella, n. gen. includes the new species Loomisiella evergreen and Loomisiella pylei. New distribution records are provided for numerous previously described species of conotylids. A complete bibliography of the family Conotylidae of the world is also included. 

Three new species, two new genera, and new family Biphragmosagittidae (Сhaetognatha) from Southwest Pacific Ocean

2011 ◽  
Vol 20 (1) ◽  
pp. 161-173
Author(s):  
A.P. Kassatkina
Keyword(s):  
New Species ◽  
Type Species ◽  
Morphological Characters ◽  
The Body ◽  
New Order ◽  
New Genera ◽  
New Family ◽  
The Family ◽  
Three New Species

Resuming published and own data, a revision of classification of Chaetognatha is presented. The family Sagittidae Claus & Grobben, 1905 is given a rank of subclass, Sagittiones, characterised, in particular, by the presence of two pairs of sac-like gelatinous structures or two pairs of fins. Besides the order Aphragmophora Tokioka, 1965, it contains the new order Biphragmosagittiformes ord. nov., which is a unique group of Chaetognatha with an unusual combination of morphological characters: the transverse muscles present in both the trunk and the tail sections of the body; the seminal vesicles simple, without internal complex compartments; the presence of two pairs of lateral fins. The only family assigned to the new order, Biphragmosagittidae fam. nov., contains two genera. Diagnoses of the two new genera, Biphragmosagitta gen. nov. (type species B. tarasovi sp. nov. and B. angusticephala sp. nov.) and Biphragmofastigata gen. nov. (type species B. fastigata sp. nov.), detailed descriptions and pictures of the three new species are presented.

Revision of Austrosignum Hodgson and Munnogonium George & Strömberg (Paramunnidae) with descriptions of eight new genera and two new species, (Crustacea: Isopoda: Asellota)

Zootaxa ◽  
2007 ◽  
Vol 1515 (1) ◽  
pp. 1-29 ◽  
Author(s):  
JEAN JUST ◽  
GEORGE D.F. WILSON
Keyword(s):  
New Species ◽  
Type Species ◽  
New Genera ◽  
Two New Species

The paramunnid genera Austrosignum Hodgson, 1910 (type species A. glaciale Hodgson, 1910) and Munnogonium George & Strömberg, 1968 (type species M. waldronense George & Strömberg, 1968) are re-diagnosed. Twenty seven species are reviewed. Austrosignum is restricted to two described species, Munnogonium to five described species. The remaining 20 species are placed in the following eight new genera: Boreosignum (type species Austrosignum maltinii Schiecke & Fresi, 1972), Cryosignum (type species Paramunna lunata Hale, 1937), Meridiosignum (type species M. macquariensis sp. nov.), Tethygonium (type species T. quadricuspis sp. nov.), Quetzogonium (type species Austrosignum dentatum Winkler, 1994), Advenogonium (type species Austrosignum fuegiae Doti & Roccatagliata, 2005), Zizzygonium (type species Paramunna magellanensis Winkler, 1994), Kussakinella (type species Austrosignum spinosum Kussakin, 1982).

The millipede family Diplomaragnidae Attems, 1907 in the Asian part of Russia, with the descriptions of two new genera and seven new species (Diplopoda, Chordeumatida)

Zootaxa ◽  
2021 ◽  
Vol 5060 (1) ◽  
pp. 1-44
Author(s):  
ELENA V. MIKHALJOVA
Keyword(s):  
New Species ◽  
Type Species ◽  
Russian Far East ◽  
Far East ◽  
Species Level ◽  
New Genera ◽  
Primorsky Krai ◽  
The Family ◽  
First Time ◽  
The Russian Far East

The family Diplomaragnidae Attems, 1907 of the Asian part of Russia is reviewed and shown to comprise 11 genera and 60 species + 1 dubious species. Two genera and seven species are described here as new to science: Alineuma gen. nov., with type species A. rodionovi sp. nov. and Litovkia gen. nov., with the type species L. anisimovka sp. nov., Diplomaragna budilovi sp. nov., Diplomaragna dentifer sp. nov., Pacifiosoma shabalini sp. nov., Pacifiosoma acutum sp. nov., Pacifiosoma triangulatum sp. nov. Pacifiosoma asperum Mikhaljova, 2016 is recorded from the Primorsky Krai for the first time. Five genera are endemic to the Asian part of Russia. At the species level, the rate of endemism amounts to 91.7%. A key is given to all species of Diplomaragnidae presently known from Siberia and the Russian Far East. The distributions of the region’s diplomaragnids are discussed. Taxonomic remarks are provided for many species.  

Revalidation of the milliped genus Amplaria Chamberlin 1941 (Diplopoda,  Chordeumatida, Striariidae), and description of two new species from caves in Sequoia and Kings Canyon National Parks, California

Zootaxa ◽  
2007 ◽  
Vol 1532 (1) ◽  
pp. 23-39 ◽  
Author(s):  
WILLIAM A. SHEAR ◽  
JEAN K. KREJCA
Keyword(s):  
New Species ◽  
North America ◽  
National Parks ◽  
Type Species ◽  
Washington State ◽  
Eastern North America ◽  
The Pacific ◽  
Two New Species ◽  
Phyletic Line

The milliped genus Amplaria Chamberlin 1941 was synonymized with Striaria Bollman 1888 by Hoffman (1980). Examination of a much wider range of materials of nominal Striaria species both from eastern North America and the Pacific coastal states shows that some species occurring from California to Washington (state) represent a distinct phyletic line, for which Amplaria Chamberlin 1941 is the oldest available generic name. Speostriaria Causey 1960 is a synonym of Amplaria. Amplaria muiri n. sp. and A. adamsi n. sp. are two new, recently discovered species from caves in Sequoia and Kings Canyon National Parks, California. Illustrations are provided of a specimen that may represent the type species, Amplaria eutypa (Chamberlin) 1953.

Two new genera, Halista Park, gen. nov. and Mireana Park, gen. nov. and six new species of the family Lecithoceridae (Lepidoptera) from the Philippines

Zootaxa ◽  
2020 ◽  
Vol 4803 (2) ◽  
pp. 316-328
Author(s):  
KYU-TEK PARK ◽  
SORA KIM
Keyword(s):  
New Species ◽  
Type Species ◽  
The Philippines ◽  
New Genera ◽  
The Family

Two new genera, Halista Park, gen. nov. (type species: Ephalista batillosa Park & Kim, sp. nov.) and Mireana Park, gen. nov. (type species: Miraena tawitawiensis Park & Kim sp. nov.), and four new species, assigned to the previously known genera: Lecithocera wolframmeyi sp. nov, L. bipunctata sp. nov., Torodora platiella sp. nov. and Chrysonasma occidentis sp. nov. are described from the Philippines. Illustrations of adults and genitalia of all new species are provided. 

Tribe Teruliini: new genera and new species of Neotropical leafhoppers with a revised key to genera and species, new records and notes on distribution and taxonomy (Hemiptera: Cicadellidae: Coelidiinae)

Zootaxa ◽  
2011 ◽  
Vol 2795 (1) ◽  
pp. 1 ◽  
Author(s):  
M. W. NIELSON
Keyword(s):  
New Species ◽  
New Record ◽  
Type Species ◽  
French Guiana ◽  
New Records ◽  
New Genera ◽  
Key To Species

Two new genera, Freytagolidia, type-species Freytagolidia ligula sp. nov. and Neodocalidia, type-species Neodocalidia connectiva sp. nov., from Colombia are described and illustrated. Nineteen additional new species are described and illustrated in the following genera: Baluba sharkeyi sp. nov. (Colombia), Bolidiana robusta sp. nov. (Colombia), B. trisetacea sp. nov. (French Guiana), B. elongata sp. nov. (Colombia), Harasupia lyrata sp. nov. (Mexico), Hastalidia acinaca sp. nov. (Peru), Jalorpa constricta sp. nov. (Colombia), Licontinia minutasetacea sp. nov. (Colombia), L. recurvata sp. nov. (Panama), Panolidia torquersi sp. nov. (Colombia), P. minuta sp. nov. (Colombia), Sapingia calcaris sp. nov. (Colombia), Stalolidia flangella sp. nov. (Colombia), S. semiovata sp. nov. (Colombia), S. setacea sp. nov. (Colombia), S. ecuadorensis sp. nov. (Ecuador), S. lyrica sp. nov. (Bolivia), S. clava sp. nov. (Brazil) and S. bulbata sp. nov. (Peru). Taxonomy and distribution of genera, revised key to species and details on new records are provided. A revised key to all known genera is also included. Colombia is a new record for Baluba, Jalorpa, Panolidia, Sapingia and Stalolidia; Panama for Licontinia; Peru for Hastalidia and Ecuador for Stalolidia. The type-species name, Coelidia marginata Stål, for Harasupia Nielson, 1979 was incorrectly cited as Harasupia marginata (Stål) and is corrected herein.

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.

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