Keratella armadura (Rotifera: Brachionidae), a new rotifer from a Michigan bog lake

1990 ◽  
Vol 68 (11) ◽  
pp. 2306-2309 ◽  
Author(s):  
Richard S. Stemberger
Keyword(s):  
North America ◽  
North American ◽  
Geographic Range ◽  
The Body ◽  
Dorsal Plate ◽  
Undescribed Species ◽  
Keratella Cochlearis ◽  
Posterior Spine ◽  
The Common ◽  
Lower Peninsula

The rotifer Keratella armadura n.sp. is described from a shallow alkaline bog lake from Michigan's lower peninsula. The facet pattern of the dorsal plate is similar to that of the common North American phenotype of Keratella cochlearis and K. taurocephala. The rigid, thickened lorica, long recurving posterior spine, and constriction of the body near the base of the anterior spines is distinctive from known congenors. The species was abundant (> 300 individuals/L) within a well-defined habitat, and appears to have a narrow geographic range. Keratella armadura occurred in spring and summer months and was absent from fall and winter collections. This restricted distribution, if common among rotifers, suggests that many undescribed species still exist in Michigan and in North America.

The Genus Epipagis Hubner, nec Hampson, in North America (Lepidoptera: Pyralidae)

1955 ◽  
Vol 87 (6) ◽  
pp. 249-252
Author(s):  
Eugene Munroe
Keyword(s):  
North America ◽  
North American ◽  
British Museum ◽  
Lepidoptera Pyralidae ◽  
The Common

Hübner ([1824-25] p. 357) defined the genus Epipagis, citing three species. Hampson (1918: 277) chose fenestralis Hübner as type, and sank Sameodes Snellen to Epipagis. The arrangement of the British Museum Pyralidae shows that Hampson thought fenestralis Hübner was the same as phyllisalis Walker; but so far as I know this synonymy was never published. Actually, Hübner's figure of fenestralis represents a female of the genus usually known as Stenophyes Lederer, wrongly synonymized by Hampson (1899) with Crocidophora Lederer. The size and coloration suggest that the species Hübner figured is the common North American one universally called buronalis Guenée.

Broad geographic sampling and DNA barcoding do not support the presence of Helobdella stagnalis (Linnaeus, 1758) (Clitellata: Glossiphoniidae) in North America

Zootaxa ◽  
2019 ◽  
Vol 4671 (1) ◽  
pp. 1-25 ◽  
Author(s):  
RAFAEL EIJI IWAMA ◽  
ALEJANDRO OCEGUERA-FIGUEROA ◽  
DANIELLE DE CARLE ◽  
CLAIRE MANGLICMOT ◽  
CHRISTER ERSÉUS ◽  
...  
Keyword(s):  
North America ◽  
North American ◽  
Dorsal Surface ◽  
Genetic Distances ◽  
The Body ◽  
Recent Analysis ◽  
Intraspecific Divergence ◽  
Geographic Boundaries ◽  
The Usa ◽  
Taxonomic Confusion

The description of Helobdella stagnalis (Linnaeus, 1758) has emphasized the presence of a nuchal, chitinous scute located on the dorsal surface in the first third of the body as the diagnostic character for the species. Historically, identifications of species of Helobdella have relied heavily on this character and, as a result, Helobdella stagnalis has been reported from an inordinately broad geographic range, including Europe, Asia, Africa, North America, and South America. In addition to a few earlier investigations, a recent analysis showed that great genetic distances (orders of magnitude greater than previous estimations of intraspecific divergence in leeches) are present between scute-bearing specimens identified as H. stagnalis from Europe and North America, implying that H. stagnalis does not occur in North America. The present study expands the geographic boundaries of taxon sampling for both European and North American taxa, and re-examines the phylogenetic relationships and cytochrome c oxidase subunit I (COI) variation within scute-bearing species of the genus Helobdella. Our analyses include specimens putatively identified as “Helobdella stagnalis” from Sweden, Norway, Iceland, England, France, Italy, Slovenia, Turkey, Russia, and Iran, as well as numerous localities covering Canada and the USA. Our results corroborate previous studies in that European and west Asian specimens form a clade, including the neotype, which is separate from North American taxa. To alleviate future taxonomic confusion, we redescribe H. stagnalis and designate a neotype from the inferred type locality. The designation of a neotype stabilizes the taxonomy of scute-bearing leeches of the genus Helobdella and enables us to definitively correct erroneous identifications reported in previous studies. We also note that at least four lineages of scute-bearing, North American species of Helobdella lack formal descriptions. 

Redescription of Parastenocaris brevipes Kessler and description of a new species of Parastenocaris (Copepoda: Harpacticoida: Parastenocarididae) from the U.S.A.

1995 ◽  
Vol 73 (1) ◽  
pp. 173-187 ◽  
Author(s):  
Janet W. Reid
Keyword(s):  
New York ◽  
New Species ◽  
North America ◽  
New Hampshire ◽  
North American ◽  
Lake Biwa ◽  
Species Group ◽  
Undescribed Species ◽  
Distal Half ◽  
A New Species

Parastenocaris brevipes Kessler is redescribed and its presence in North America is established through comparison of specimens from the U.S.A., Finland, and Germany. Parastenocaris wilsoni Borutskii, Parastenocaris starretti Pennak, Parastenocaris biwae Miura, and Parastenocaris sp. 2 Strayer (Strayer, D.L. 1988. Stygologia, 4: 279–291.) are assigned to the synonymy of P. brevipes. Biwaecaris Jakobi is a synonym of Parastenocaris Kessler. Some North American records of P. brevipes or P. starretti refer in fact to P. brevipes, other records to a presently undescribed species. Newly verified records of P. brevipes include Massachusetts, Michigan, New Hampshire, New York, Virginia, and Wisconsin in the U.S.A., and Lake Biwa, Japan. Parastenocaris trichelata, new species, is described from Virginia, U.S.A. The taxon is distinguished in both sexes by the combination of the long slender caudal ramus with all setae inserted in the distal half and by the medial spine of the leg 1 basipodite, and in the male by the leg 4 with slender hyaline endopodite and 3 spines on the basipodite medial to the endopodite. The new species little resembles any known North American parastenocaridid, nor is it assignable to any presently defined species-group in the genus.

Mallophagan vectors and the avian filarioids: new subspecies of Pelecitus fulicaeatrae (Nematoda: Filarioidea) in sympatric North American hosts, with development, epizootiology, and pathogenesis of the parasite in Fulica americana (Aves)

1989 ◽  
Vol 67 (11) ◽  
pp. 2821-2833 ◽  
Author(s):  
Cheryl M. Bartlett ◽  
R. C. Anderson
Keyword(s):  
Adult Female ◽  
North American ◽  
The Body ◽  
Age Classes ◽  
Fulica Americana ◽  
Fulica Atra ◽  
The Common ◽  
Podiceps Grisegena ◽  
First Time ◽  
Original Type

Subspecies of Pelecitus fulicaeatrae (Diesing, 1861) Lopez-Néyra, 1956 are proposed for the first time. The parasite in the original type host, i.e., the Common Coot (Fulica atra L.) in Great Britain, becomes the nominotypical subspecies, namely Pelecitus fulicaeatrae fulicaeatrae (Diesing, 1861) n.subsp.; it requires further taxonomic study. Subspecies in two sympatric North American hosts are described, and transmission by lice (Mallophaga: Amblycera) is suggested to have played a role in their evolution. Pelecitus fulicaeatrae americanae n.subsp. in the American Coot (Fulica americana Gmelin) has narrower lateral alae at midbody in the male, tighter helical twisting and more rotations in the body of the adult female, and a vulva that tends to be closer to the end of the oesophagus than that of Pelecitus fulicaeatrae grisegenae n.subsp. in the Red-necked Grebe (Podiceps grisegena (Boddaert)). Development of P. f. americanae was followed in experimentally infected American Coots. At 20 days postinfection, worms had migrated to the definitive site in the ankles and developed to the adult stage; these worms were sexually immature and also differed in other morphologic ways from mature specimens. Worms at 210 and 265 d resembled those from wild-caught coots, and females contained microfilariae. Pelecitus f. americanae is reported for the first time in Wisconsin, North Dakota, and California and probably is widespread in coots in North America. Both nesting and wintering coots contained three age-classes of adult female worms (too young to produce microfilariae, producing microfilariae, senescent), suggesting that transmission is not restricted to any particular period during the year. In general, no evidence of infection was apparent upon external examination of intact wild-caught infected coots, whereas ankles of intact wild-caught infected grebes were frequently swollen. Upon internal examination of coots, a visible response to worms was also generally not observed. In a few coots, however, worms were within soft, thin-walled capsules and histologic examination revealed chronic proliferative tenosynovitis.

Charophytivory, Playas y Papalotes, a Local Paradigm of Global Relevance

1999 ◽  
Vol 47 (3) ◽  
pp. 399 ◽  
Author(s):  
Vernon W. Proctor
Keyword(s):  
New Mexico ◽  
North America ◽  
North American ◽  
Hyalella Azteca ◽  
The Other ◽  
Habitat Types ◽  
Run Off ◽  
Freshwater Amphipods ◽  
The Common ◽  
Grazing Pressures

The Llano Estacado region of western Texas and adjacent New Mexico has one of the most species-rich charophyte floras known for North America, but upon closer inspection this flora is seen to consist of two, strictly non-overlapping segments, one of 12 taxa, the other of nine. The larger group of species is confined to a vast series of shallow, ephemerally inundated depressions known as playas. These normally fill with run-off rainwater in late May or early June, remain flooded through early to mid-September before eventually drying to the curling polygon stage near the end of September. Approximately 8 months later the cycle is repeated. The remaining nine charophytes are confined to permanently inundated sites, the most common of which are livestock-watering windmill complexes, known as papalotes. Rarely, if ever, are members of the playa-12 encountered in papalotes or members of the papalote-9 in playas. The underlying bases for this ‘two flora’ dichotomy stem from the contrasting amphipod populations engendered by the two habitat types. Most freshwater amphipods (scuds), including the common North American herbivore Hyalella azteca (Saussure), cannot withstand complete desiccation which, accordingly, prevents its colonisation of playas. By contrast, scuds often reach exceptionally high densities in the associated concrete or metal tanques of papalotes, since such specialised habitats are usually free of vertebrate predators, e.g. birds, fish, turtles, salamanders. Scud- resistant charophytes are larger and slower to develop gametangia, features inimical to success in short- lived playas. By contrast, precocious charophyte opportunists–typical of playa floras–cannot withstand the grazing pressures of papalote (or papalote-like) environments. While charophytivory is assumed to be of worldwide occurrence and significance, it has been clearly demonstrated only in the unique juxtaposition of ‘playas y papalotes’.

The Newbigin Gauntlet: Developing a Domestic Missiology for North America

1991 ◽  
Vol 19 (4) ◽  
pp. 391-408 ◽  
Author(s):  
George R. Hunsberger
Keyword(s):  
North America ◽  
Recent Work ◽  
North American ◽  
Common Good ◽  
The Common Good ◽  
The North ◽  
The Common ◽  
American Churches ◽  
Do So

The contextual missiology of the North American churches is poorly formed, at best. At the heart of the recent work of Lesslie Newbigin, there lies a challenge to develop a domestic missiology marked by the theological depth he has habitually brought to bear on missiological issues. To do so will require that we acknowledge the fundamentally new social circumstances in which the churches of North America now live, and pursue the answer to three questions in light of those circumstances: How must we grasp our identity? How must we seek the “common good”? And how must we tell the gospel?

A Revision of the Genus Campichoeta Macquart (Diptera: Diastatidae)

1962 ◽  
Vol 94 (1) ◽  
pp. 1-10 ◽  
Author(s):  
J. F. McAlpine
Keyword(s):  
United States ◽  
North America ◽  
Common Species ◽  
Palaearctic Species ◽  
Undescribed Species ◽  
Southwestern United States ◽  
New Information ◽  
The Common

Examination of material of the genus Campichoeta Macq. (= Thryptocheta Rond.) from both the Old and the New Worlds, follawing clarification of the identities of most of the Palaearctic species by Basden and Collin (1958), revealed significant new information on the taxonomy of the genus. It showed that the common species in North America, heretofore called Thryptocheta micans Hendel (1911), is the same as Campichoeta griseola (Zett.) (1855) known from a single collection apparently made by Boheman in central Sweden about 1852. Also, it showed that an undescribed species occurs in southwestern United States.

scholarly journals Biochronology and biogeography of Paradaphoenus (Carnivora: Amphicyonidae) within the Great Plains Region of North America

2018 ◽  
Author(s):  
Clint A Boyd ◽  
Ed Welsh
Keyword(s):  
North America ◽  
South Dakota ◽  
North Dakota ◽  
Great Plains ◽  
Geographic Range ◽  
Single Specimen ◽  
Local Fauna ◽  
White River ◽  
The Common ◽  
Size And Morphology

The amphicyonid, or “bear-dog,” Paradaphoenus was a small-bodied, hypercarnivorous carnivoran that lived in North America during the Oligocene. Specimens of Paradaphoenus are rare, in part owing to the common inaccurate referral of specimens to the abundant canid Hesperocyon, which was similar in size and morphology. Four new specimens of Paradaphoenus are noted from North Dakota and South Dakota that expand the geographic range of this taxon within the Great Plains region of North America and expand our knowledge of its anatomy. A single specimen from either a transitional Orellan/Whitneyan or early Whitneyan fauna in the Little Badlands area of North Dakota is referred to Paradaphoenus minimus. That taxon is elsewhere restricted to Orellan faunae, making that specimen the youngest occurrence of P. minimus yet recognized. The remaining specimens are from two early Whitneyan faunas, the Cedar Pass local fauna in South Dakota and a new locality within the Little Badlands area of North Dakota, and are referred to Paradaphoenus tooheyi. These discoveries highlight the difficulties of elucidating the biostratigraphic and biogeographic distributions of relatively rare taxa within the White River Chronofauna given the propensity for many specimen identifications to be biased in favor of more abundant, well-known taxa.

Phragmites australis (common reed).

2021 ◽  
Author(s):  
Chris Parker
Keyword(s):  
North America ◽  
Phragmites Australis ◽  
North American ◽  
Native Species ◽  
Common Reed ◽  
Native North American ◽  
Insect Populations ◽  
The Common ◽  
Suitable Habitats ◽  
Wetland Habitats

Abstract Phragmites australis, the common reed, is an aggressive, vigorous species which, in suitable habitats, will out-compete virtually all other species and form a totally dominant stand. Its invasive character has been particularly apparent in North America where it has become dominant in a range of wetland habitats replacing native species and biotypes including the native North American P. australis subsp. americanus. Bird, fish and insect populations can also be affected.

Comparisons of Community Structure Among Small Mammals of North-American and Australian Deserts

1994 ◽  
Vol 42 (4) ◽  
pp. 501 ◽  
Author(s):  
SR Morton ◽  
JH Brown ◽  
DA Kelt ◽  
JRW Reid
Keyword(s):  
Community Structure ◽  
North America ◽  
Small Mammal ◽  
North American ◽  
Median Number ◽  
Geographic Range ◽  
Mammal Species ◽  
Number Of Species ◽  
Structure Of Communities ◽  
Mammal Communities

Data on the presence of small mammal species at 201 sites in North American deserts and 245 in arid Australia were used to quantify similarities and differences in community structure between the two continents. In all, 41 species of rodents were sampled in North America and 26 species, both rodents and marsupials, in Australia. On both continents, each species occurred throughout its geographic range with many other species and as a member of many different combinations. The number of species with which each species coexisted was positively correlated with its area of geographic range, although most species occurred at less than half the sites within their ranges. The median number of species at a site was three in North America and two in Australia, but the numbers of species per site on the two continents were not significantly different. Despite the relatively small numbers of species per site, numerous different combinations of species were observed (North America, 158; Australia, 108). Communities in North America were dominated by granivores and in Australia by omnivores; insectivores were also prominent in Australia. These results support conclusions of an earlier study of granivorous rodents in North America, in suggesting that there is substantial spatial variation in the composition of small mammal communities. The magnitude of this variation indicates that species and communities tend to be individualistic in spatial distribution, such that communities are not tightly restricted to particular specific combinations. There is evidence from North America that deterministic processes play a limited role in determining community structure; no such analyses have yet been undertaken for communities in arid Australia. Trophic structure of communities is markedly different on the two continents. Not all trophic differences can presently be explained, but they may be due to differences between the continents in temporal patterns of food supply.

Sign in / Sign up

Export Citation Format

Share Document