The common ecotoxicology laboratory strain ofHyalella aztecais genetically distinct from most wild strains sampled in eastern North America

2013 ◽  
pp. n/a-n/a ◽  
Author(s):  
Kaley Major ◽  
David J. Soucek ◽  
Rosanna Giordano ◽  
Mark J. Wetzel ◽  
Felipe Soto-Adames
Keyword(s):  
North America ◽  
Laboratory Strain ◽  
Eastern North America ◽  
Wild Strains ◽  
The Common

Notes on Megabothris asio (Baker) and M. calcarifer (Wagner) with the Description of a New Subspecies (Siphonaptera: Ceratophyllidae)

1950 ◽  
Vol 82 (6) ◽  
pp. 126-133 ◽  
Author(s):  
George P. Holland
Keyword(s):  
North America ◽  
Microtus Pennsylvanicus ◽  
Geographical Region ◽  
Meadow Vole ◽  
Eastern North America ◽  
Western North America ◽  
Coast Range ◽  
Tamias Striatus ◽  
New Subspecies ◽  
The Common

Aside from M. acerbus (Jordan), which is apparently a breeding parasite of Tamias striatus (L.), a chipmunk, the holarctic genus Megabothris Jordan 1933 appears to be truly associated with the Microtinae, some of the species showing special affinities for particular species of these mice, others infesting several species, or even genera, within a geographical region.The nearctic Megabothris asio (Baker) favours the common meadow vole, Microtus pennsylvanicus (Ord), and occurs throughout most of the range of that mouse. The writer recognizes two valid subspecies, M. asio asio, which is restricted to eastern North America, and M. asio megacolpus (Jordan), of western North America. The nominate race ranges from Labrador to Delaware. M. asio megacolpus (=M. asio orectus Jord.) ranges from western Quebec, western Ontario, and Michigan westward to the Coast Range, and from California north at least to the 60th parallel.

Correct scientific names for the least brook lamprey and the American brook lamprey (Petromyzontidae)

1982 ◽  
Vol 60 (5) ◽  
pp. 856-864 ◽  
Author(s):  
Vadim D. Vladykov ◽  
Edward Kott
Keyword(s):  
North America ◽  
Critical Study ◽  
Eastern North America ◽  
Taxonomic Character ◽  
Brook Lamprey ◽  
The Common ◽  
American Authors ◽  
Urogenital Papilla

Among students of lamprey taxonomy, there has been agreement on the common names for the least brook lamprey and American brook lamprey, two nonparasitic species of eastern North America. However, there still is a disagreement as to their scientific names. On the basis of a critical study of original descriptions and drawings of American authors of the last century, we reached the conclusion that the length of the urogenital papilla in spawning males is a very important taxonomic character. Therefore, we propose that the name for the least brook lamprey, which has a long urogenital papilla, is Lampetra lamottenii (Lesueur); and for the American brook lamprey, with a short papilla, is Lethenteron wilderi (Gage).

The North American Species of Calocalpe Hübner (Lepidoptera, Geometridae)

1955 ◽  
Vol 87 (8) ◽  
pp. 325-330 ◽  
Author(s):  
Douglas C. Ferguson
Keyword(s):  
North America ◽  
North American Species ◽  
Food Plant ◽  
Just In Time ◽  
Eastern North America ◽  
Martha's Vineyard ◽  
The North ◽  
Martha’S Vineyard ◽  
The Common ◽  
Single Larva

Inconsistencies in larval habits of the Nearctic Calocalpe population have been known to lepidopterists of eastern North America for over a decade, at least since the publication of The Lepidoptera of Nantucket and Martha's Vineyard Islands, Massachusetts by Dr. Frank Morton Jones and Mr. Charles P. Kimball (Nantucket Maria Mitchell Assoc., IV, 1943). In writing of the occurrence of undulata on Martha's Vineyard, Dr. Jones mentioned “solitary larvae, identified by breedings, occasional on Azalea”. Since only the common gregarious larvae on cherry were known up to that time and always considered as representing an American variant of undulata, the report of a solitary larva on a totally different food plant sounded interesting. This was drawn to my attention by Mr. Laurence R. Rupert of Sardinia, N.Y., who did so much to inspire my interest in Lepidoptera in earlier years. On a collecting trip with him to Martha's Vineyard in 1947, one of the things sought for was the Calocalpe mentioned by Dr. Jones. We did not find any, but since that time Dr. J. McDunnough and I on a number of occasions have bred specimens from solitary larvae on Rhodora at Halifax. Since Rhodora and Azalea are closely related, I assume this to be the same as the Martha's Vineyard species. Dr. McDunnough bred one from a larvae on Spiraea, the specimen emerging just in time to be mentioned in this paper. On another occasion I bred one from a single larva on willow, undoubtedly also the same species, and this provided the first clue to its relationship with the Palaearctic willow-feeding undulata.

Ecology of Two Prosimulium Species (Diptera) with Reference to their Ovarian Cycles

1961 ◽  
Vol 93 (12) ◽  
pp. 1113-1140 ◽  
Author(s):  
L. Davies
Keyword(s):  
North America ◽  
Anatomical Study ◽  
Sympatric Species ◽  
Eastern North America ◽  
Life Stages ◽  
Eastern Canada ◽  
The North ◽  
Larval Salivary Gland ◽  
The Common ◽  
Ovarian Cycles

Prosimulium fuscum Syme and Davies, P. mixtum S. and D. and P. fontanum S. and D. form a complex of closely-related and largely sympatric species formerly known in North America (Twinn, 1936; Stone and Jamnback, 1955) under the single name P. hirtipes Fries, a well known species in the northern Palaearctic. The first step in demonstrating the multiple nature of the forms grouped under this name in North America was taken by Rothfels (1956) who showed by study of rhe larval salivary gland chromosomes that at least three non-interbreeding forms were present in eastern Canada. L. Davies (1957a) concluded from a study of specimens of all life-stages that none of the North American forms agreed with European P. hirtipes. A further step in the process was afforded by the work of Syme and D. M. Davies (1958), which erected the three species named above as a result of anatomical study of cytologically defined material, and showed that adult females of P. fuscum and P. mixtum could be reliably separated, mainly by features of the genitalia. The present work may be considered as a further step in the study of the common Prosimulium of eastern North America, by providing information on their ecology, thus amplifying the cytological and anatomical conclusions arrived at in the papers cited above.

scholarly journals In Vitro Susceptibility of Isolates of Francisella tularensis Types A and B from North America

2008 ◽  
Vol 52 (6) ◽  
pp. 2276-2278 ◽  
Author(s):  
Sandra K. Urich ◽  
Jeannine M. Petersen
Keyword(s):  
North America ◽  
Francisella Tularensis ◽  
Antimicrobial Agents ◽  
Susceptibility Testing ◽  
Laboratory Strain ◽  
In Vitro Susceptibility ◽  
Testing Method ◽  
The Common ◽  
Common Laboratory

ABSTRACT Due to concern that Francisella tularensis, the causative agent of tularemia, may be used as a bioterrorist weapon, the Clinical and Laboratory Standards Institute recently provided a susceptibility testing method with breakpoints. Here, 169 isolates (92 type A and 77 type B) from North America were tested against seven antimicrobial agents (streptomycin, gentamicin, tetracycline, doxycycline, ciprofloxacin, levofloxacin, and chloramphenicol) used for the treatment of tularemia. The MICs for all of the isolates fell within the susceptible range. In addition, all isolates had MICs for erythromycin of 0.5 to 4 μg/ml, in contrast to an MIC of >256 μg/ml for the common laboratory strain LVS (live vaccine strain).

Symbiotic embedment structures in Silurian Caryocrinites (Echinodermata, Rhombifera, Hemicosmitida)

2020 ◽  
pp. 1-7
Author(s):  
James R. Thomka ◽  
Carlton E. Brett ◽  
Donald L. Bissett
Keyword(s):  
North America ◽  
Host Specificity ◽  
Narrow Range ◽  
Proximal Portion ◽  
Lower Portion ◽  
Eastern North America ◽  
Morphological Similarity ◽  
The Common

Abstract A variety of pits representing symbiotic embedments, sometimes associated with pathological deformation in the host, are known from the skeletons of Paleozoic stalked echinoderms. These structures are well known from multiple genera of crinoids and a limited number of blastozoans but have not previously been described in detail from the skeletons of rhombiferans. This is surprising given the abundance of rhombiferans in certain deposits, the co-occurrence of rhombiferans with frequently infested taxa, including diploporitans, in multiple assemblages, and the morphological similarity between certain rhombiferan taxa and coeval infested crinoids. The common hemicosmitid rhombiferan Caryocrinites Say, 1825 is widespread throughout the middle Silurian of eastern North America and is herein reported to contain symbiotic (potentially parasitic) embedment structures. Specimens were collected from the lower portion of the mudstone lithofacies of the Massie Formation (Wenlock, Sheinwoodian) at the Napoleon quarry of southeastern Indiana, USA. Strong host specificity is indicated by the absence of pits in C. ornatus Say, 1825 and exclusive infestation of a smaller co-occurring species of Caryocrinites. Thecae with embedment structures are consistently smaller than thecae without such structures, with pitted specimens being restricted to a narrow range of thecal heights (20–24 mm). All embedment structures are present only on the proximal portion of thecae, with individual specimens containing between one and 30 pits. No elevated rims or significant swelling were observed on any specimens, and all pits are relatively small (~1 mm in diameter). The presence of symbiotic embedment structures represents an additional example of a crinoid-like aspect to the ecology of Caryocrinites.

The Identification and Study of Indian Shell Middens in Eastern North America: 1643–1861

1986 ◽  
Vol 6 (3) ◽  
pp. 227-243 ◽  
Author(s):  
Andrew L. Christenson
Keyword(s):  
Nineteenth Century ◽  
Civil War ◽  
North America ◽  
East Coast ◽  
Eastern North America ◽  
Shell Midden ◽  
Shell Middens ◽  
Work Done

Although the interest in shell middens in North America is often traced to reports of the discoveries in Danish kjoekkenmoeddings in the mid-nineteenth century, extensive shell midden studies were already occurring on the East Coast by that time. This article reviews selected examples of this early work done by geologists and naturalists, which served as a foundation for shell midden studies by archaeologists after the Civil War.

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