The stratigraphic importance of species of Sumatradinium, Barssidinium, and Erymnodinium, Neogene dinoflagellate genera from offshore eastern Canada

1994 ◽  
Vol 31 (3) ◽  
pp. 567-582 ◽  
Author(s):  
Judith K. Lentin ◽  
Robert A. Fensome ◽  
Graham L. Williams
Keyword(s):  
New Species ◽  
Morphological Variation ◽  
Generic Diagnosis ◽  
Dinoflagellate Cysts ◽  
Eastern Canada ◽  
Specific Diagnosis ◽  
Constituent Species ◽  
Rich Diversity ◽  
Biostratigraphic Subdivision

The Neogene strata of offshore eastern Canada contain a rich diversity of dinoflagellate cysts. Among the most distinctive are species of the peridinialean genus Sumatradinium and the related genera Barssidinium gen.nov. and Erymnodinium gen.nov. Sumatradinium and Erymnodinium have a reticulate wall, whereas Barssidinium has a smooth to granulate wall. Sumatradinium and Barssidinium have processes or pustules only; Erymnodinium has crests. The three genera and their constituent species are useful for biostratigraphic subdivision in the Miocene and Pliocene, as exemplified in the two wells Evangeline H-98 and Heron H-73; stratigraphic control for these wells is based on previously established palynologic data. To categorize the considerable morphological variation of these genera and promote their biostratigraphic usefulness, we propose five new species: Sumatradinium druggii, Sumatradinium pustulosum, Barssidinium evangelineae, Barssidinium graminosum, and Barssidinium wrennii. We also emend the generic diagnosis of Sumatradinium and the specific diagnosis of Sumatradinium hispidum.

LIMNOZETES (ACARI: ORIBATIDA: LIMNOZETIDAE) OF NORTHEASTERN NORTH AMERICA

1989 ◽  
Vol 121 (6) ◽  
pp. 453-506 ◽  
Author(s):  
Valerie M. Behan-Pelletier
Keyword(s):  
New Species ◽  
North America ◽  
Morphological Variation ◽  
Generic Diagnosis ◽  
Northeastern North America ◽  
Tabular Format ◽  
Transformation Series

AbstractThe species of Limnozetes of northeastern North America are treated. A new generic diagnosis is given. Eight new species are described: L. latilamellata, L. guyi, L. borealis, L. onondaga, L. amnicus, and L. palmerae on the basis of adults and immatures, and L. lustrum and L. atmetos on the basis of adults. Identification of adults and immatures of these species is presented in tabular format. The range of morphological variation exhibited by these species is discussed. Transformation series for eight character states in Limnozetes are hypothesized on the basis of comparison with Hydrozetes. A key is given to the adults of the nine species of Limnozetes recorded from northeastern North America.

Marine tube-dwelling diatoms of eastern Canada: descriptions, checklist, and illustrated key

1984 ◽  
Vol 62 (4) ◽  
pp. 778-794 ◽  
Author(s):  
Christopher S. Lobban
Keyword(s):  
New Species ◽  
Northwest Territories ◽  
Common Species ◽  
Bay Of Fundy ◽  
Eastern Canada ◽  
Lawrence Estuary ◽  
The Common ◽  
Living Material ◽  
St Lawrence Estuary ◽  
A New Species

From a study of living materials and specimens in several regional herbaria, a list has been drawn up of all the common and several of the rarer tube-dwelling diatoms of eastern Canada. Descriptions, illustrations of living material and acid-cleaned valves, and a key to the species are provided. Most specimens were from the Atlantic Provinces and the St. Lawrence estuary, but a few were from the Northwest Territories. By far the most common species is Berkeleya rutilans. Other species occurring commonly in the Quoddy Region of the Bay of Fundy, and sporadically in space and time elsewhere, arc Navicula delognei (two forms), Nav. pseudocomoides, Nav. smithii, Haslea crucigera, and a new species, Nav.rusticensis. Navicula ramosissima and Nav. mollis in eastern Canada are usually found as scattered cohabitants in tubes of other species. Nitzschia tubicola and Nz. fontifuga also occur sporadically as cohabitants.

Nucularcidae: a new family of palaeotaxodont Ordovician pelecypods (Mollusca) from North America and Australia

2007 ◽  
Vol 44 (10) ◽  
pp. 1479-1501 ◽  
Author(s):  
John Pojeta Jr. ◽  
Christopher A Stott
Keyword(s):  
New Species ◽  
Type Species ◽  
New Genus ◽  
Late Ordovician ◽  
Eastern Canada ◽  
Middle Ordovician ◽  
New Family ◽  
Central Australia ◽  
Northeastern Usa ◽  
Subjective Synonym

The new Ordovician palaeotaxodont family Nucularcidae and the new genus Nucularca are described. Included in Nucularca are four previously described species that have taxodont dentition: N. cingulata (Ulrich) (the type species), N. pectunculoides (Hall), N. lorrainensis (Foerste), and N. gorensis (Foerste). All four species are of Late Ordovician (Cincinnatian Katian) age and occur in eastern Canada and the northeastern USA. Ctenodonta borealis Foerste is regarded as a subjective synonym of Nucularca lorrainensis. No new species names are proposed. The Nucularcidae includes the genera Nucularca and Sthenodonta Pojeta and Gilbert-Tomlinson (1977). Sthenodonta occurs in central Australia in rocks of Middle Ordovician (Darriwilian) age. The 12 family group names previously proposed for Ordovician palaeotaxodonts having taxodont dentition are reviewed and evaluated in the Appendix.

A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae, a new cycad species from Southeastern Oaxaca, Mexico

Phytotaxa ◽  
2021 ◽  
Vol 528 (2) ◽  
pp. 93-110
Author(s):  
JOSÉ SAID GUTIÉRREZ-ORTEGA ◽  
MIGUEL ANGEL PÉREZ-FARRERA ◽  
JEFFREY CHEMNICK ◽  
TIMOTHY J. GREGORY
Keyword(s):  
New Species ◽  
Morphological Variation ◽  
Related Species ◽  
Statistical Tests ◽  
Distinct Species ◽  
Closely Related Species ◽  
Morphometric Variation ◽  
Isthmus Of Tehuantepec ◽  
Morphological Differences ◽  
Recent Evaluation

The cycad genus Dioon comprises 17 species from Mexico and Honduras, all of them delimited based on their morphological variation and geographic distribution. A recent evaluation of the biological variation among Dioon populations from Oaxaca and Chiapas, Mexico, demonstrated that the concept of the species Dioon merolae actually consists of three lineages that should be recognized as different taxa. One lineage was already described as Dioon oaxacensis, leaving the concept of Dioon merolae comprising two lineages distributed on both sides of the Isthmus of Tehuantepec. However, there are conspicuous morphological differences between these two lineages. Here, we tested whether such a differentiation within the concept of Dioon merolae merits the differentiation of two different taxa. We evaluated the qualitative and morphometric variation among populations belonging to the Dioon merolae lineages, and compared it with the closely related species Dioon oaxacensis. Morphological observations and statistical tests demonstrated that the populations of southeastern Oaxaca, traditionally considered as part of Dioon merolae, represent a distinct species that we described as Dioon salas-moralesae. Identifying the diagnostic characters of this new species helps enable an understanding of the criteria that should be considered to delineate the boundaries between other cycad species.

No longer endemic to Africa: Kribiodosis Kieffer, 1921 (Diptera, Chironomidae) new to Oriental China with a phylogeny and expanded adult generic diagnoses

Zootaxa ◽  
2021 ◽  
Vol 5072 (6) ◽  
pp. 560-574
Author(s):  
WU HAN ◽  
JIE LIU ◽  
YIFAN LUO ◽  
HONGQU TANG
Keyword(s):  
New Species ◽  
Mixed Model ◽  
Dna Barcode ◽  
Sister Group ◽  
Phylogenetic Position ◽  
Generic Diagnosis ◽  
Likelihood Methods ◽  
Core Member ◽  
Maximum Likelihood Methods ◽  
African Genus

Kribiodosis Kieffer, 1921, an African genus of Chironomini (Diptera: Chironomidae), is newly recorded from the Oriental region through a new species K. cantonensis sp. n. Detailed descriptions of the male, female and a DNA barcode are provided. With the inclusion of the new species bearing scutal tubercle and fused tibial comb, the generic diagnosis needs revision and expansion. The phylogenetic position of Kribiodosis within the tribe Chironomini is explored based on five concatenated genetic makers (18S, 28S, CAD1, CAD4 and COI-3P) using both mixed-model Bayesian inference and maximum likelihood methods. Kribiodosis is placed as a core member of the Microtendipes group but its precise sister group remains unclear. Inclusion of the analysis of Nilodosis Kieffer, another Chironomini genus with an African-Oriental distribution, reveals an unexpected robust position as sister to a large and diverse inclusive group of many Chironomini.  

First Asian report of the genus Chilibathynella Noodt, 1963 (Bathynellacea, Syncarida), with the description and biogeographic significance of a new species from Kotumsar Cave, India

Zootaxa ◽  
2006 ◽  
Vol 1370 (1) ◽  
pp. 23 ◽  
Author(s):  
Y. RANGA REDDY
Keyword(s):  
New Species ◽  
Generic Diagnosis ◽  
Tropical Zone ◽  
Central Chile ◽  
Phylogenetic Studies ◽  
A New Species

The gen us Chilibathynella Noodt , 1963, presently contains two species: C. clandestina Noodt, 1963 and C. australiensis Schmi nke, 1973, fr om Central Chile an d southe r n Australia, respectivel y. A third spe cies, nam ed Chilibathynella kotumsarensis n. sp., is described herein f r om a cave in India. Th e new species has a unique combi n ation o f morphological cha r acters , which, inter alia, include six-segme nted anten na, presence of epip odite on th oraco pod I and of three en dopodal setae on the male thor acopod VIII , inhomonomous row o f spines on uro podal s ymp od, spineless uropod al endopodite, and convex anal operculu m. Some of these characters have not only necessitated pa r tial amendment of the generic diagnosis , but could p r ove of value in phylogenetic studies as well . Furthermore , the discovery of the new species is of interest because it is the first r ecor d of Chilibathynella from Asia as well as the tropical zone , thus filling a huge gap in the global distrib ution of t his genus.

A Synopsis of the ridingsiana Group of the Genus Euxoa (Lepidoptera: Noctuidae) With a Description of a New Species

1965 ◽  
Vol 97 (11) ◽  
pp. 1221-1226 ◽  
Author(s):  
D. F. Hardwick
Keyword(s):  
New Species ◽  
Constituent Species ◽  
Specific Rank ◽  
Lepidoptera Noctuidae ◽  
A New Species

AbstractThe ridingsiana group of the genus Euxoa is defined, and the eight constituent species are distinguished by means of a key. Euxoa macrodentata, most closely related to Euxoa cooki McD., is described as new. Euxoa exculta (Sm.) and its nominal subspecies criddlei Sm. are synonymized with Euxoa perpolita (Morr.), and Euxoa perolivalis manitobana McD. is raised to specific rank.

Taxonomic revision of four species of the Neotropical land planarian genera Cratera and Geoplana (Platyhelminthes, Tricladida) with a description of two new species and an emendation of Cratera

Zootaxa ◽  
2018 ◽  
Vol 4500 (4) ◽  
pp. 517 ◽  
Author(s):  
DOMINGO LAGO-BARCIA ◽  
FERNANDO CARBAYO
Keyword(s):  
New Species ◽  
Morphological Variation ◽  
Morphological Feature ◽  
Ejaculatory Duct ◽  
Taxonomic Revision ◽  
Undescribed Species ◽  
Terminal Portion ◽  
Two New Species ◽  
A New Species ◽  
Land Planarian

The Brazilian land planarians Cratera crioula, C. joia, Geoplana hina, and G. taxiarcha (Platyhelminthes, Tricladida, Geoplanidae) are revised taxonomically from type material and additional specimens. Geoplana hina sensu Carbayo et al. (2013) was found to be an undescribed species and therefore is described and named as Cratera picuia sp. n. A new species of the genus is also described and named as Cratera arucuia sp. n. G. hina and G. taxiarcha are transferred to Cratera. The most remarkable morphological feature of Cratera—a dilated terminal portion of the ejaculatory duct—is either absent, inconspicuous, or variable in C. hina, C. joia, C. picuia sp. n., and C. arucuia sp. n. Based on the monophyletic status of Cratera inferred elsewhere, an emendation of the genus is here proposed to encompass the morphological variation observed in the genus. 

scholarly journals Contribution to the knowledge of the oribatid mite genus Pilobatella (Acari, Oribatida, Haplozetidae)

Acarologia ◽  
2020 ◽  
Vol 60 (3) ◽  
pp. 545-556
Author(s):  
Sergey G. Ermilov ◽  
Josef Starý
Keyword(s):  
New Species ◽  
National Park ◽  
Oribatid Mite ◽  
Generic Diagnosis ◽  
Region Versus ◽  
Medium Length ◽  
Anogenital Region ◽  
Two New Species ◽  
Forest Leaf Litter ◽  
Mite Genus

The genus Pilobatella (Oribatida, Haplozetidae) comprises 10 species, which are distributed in the Palaeotropical region; this includes two new species described herein on the basis of adult specimens sampled from forest leaf litter in Andasibe-Mantadia National Park of eastern Madagascar. Pilobatella mikoi n. sp. is similar to Pilobatella baloghi Mahunka, 2003 in having long interlamellar setae and adanal setae ad1 and ad2, but differs by having monodactylous legs (versus tridactylous) and a bothridial seta that is gradually expanded to a narrow head (versus setiform, without head). Pilobatella kovaci n. sp. is similar to P. mikoi n. sp. in having monodactylous legs, long interlamellar setae and adanal setae ad1 and ad2, but differs by the presence of lineolate notogaster and anogenital region (versus lineolate markings absent), long tutoria (versus tutoria of medium length), rounded trochanters distodorsally (versus pointed) and clearly distanced medial ends of apodemes 2 (versus nearly touching at midline). A revised generic diagnosis and an identification key to known species of Pilobatella are presented.

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