Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Roy T. Sawyer"'
Autor:
Roy T. Sawyer
Publikováno v:
Taxonomy, Vol 2, Iss 2, Pp 160-179 (2022)
The genus Placobdella (Glossiphoniidae) has a centre of species concentration in North America. The type species P. costata is the only representative in the Palaearctic region. American Placobdella which feed on turtles are represented predominantly
Externí odkaz:
https://doaj.org/article/cf6fb4b7981a4c79892513be69daa6b2
Autor:
Roy T. Sawyer
The geologically ancient Tidewater region of southeastern Virginia and northeastern North Carolina rests precariously atop millions of years of erosion from the nearby Appalachian Mountains. An immense wetland at near sea level, it is host to every c
Autor:
Roy T. Sawyer
A tuberculated species of turtle leech is indigenous to the Great Dismal Swamp and environs of northeastern North Carolina, and differs from other known species of Placobdella. This study of hundreds of specimens for more than a decade documents its
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::091172f920f2bcea1e9f75316201239f
https://zenodo.org/record/5027364
https://zenodo.org/record/5027364
Autor:
Roy T. Sawyer
Publikováno v:
Zootaxa. 4658(2)
The terrestrial leech Haemopis septagon Sawyer & Shelley, 1976, is indigenous to the Great Dismal Swamp and environs of northeastern North Carolina and southeastern Virginia, USA. Ever since its discovery in 1895 at Lake Drummond in the Dismal Swamp,
Autor:
Roy T. Sawyer
Publikováno v:
Zootaxa. 4544
The jawed leech Philobdella floridana (Verrill, 1874) occurs widely in swamps of the southeastern United States. The discovery of a population of P. floridana in Lake Phelps, an isolated lake in the Albemarle Peninsula in the Outer Banks region of No
Autor:
Roy T. Sawyer
Publikováno v:
Zoosystema. 35:113-123
The apparent absence of the medicinal leech Hirudo medicinalis Linnaeus, 1758, in Ireland has been noted for over 150 years. Furthermore, not a single native Irish specimen has been preserved to prove its existence. The status of the Irish medicinal
Autor:
Roy T. Sawyer
Publikováno v:
Medical History
In the nineteenth century the medicinal leech Hirudo medicinalis evolved into a lucrative commodity in great demand throughout the western world. In less than a century its trade became big business by any measure, involving tens of millions of anima
Autor:
Fred O. P. Hechtel, Roy T. Sawyer
Publikováno v:
Journal of Natural History. 36:1269-1289
The medicinal leech Hirudo medicinalis Linnaeus, 1758 is genotype of the genus Hirudo and constitutes the taxonomic basis for the family Hirudinidae and even the class Hirudinea. In spite of its unique taxonomic significance, H. medicinalis has never
Autor:
Roy T. Sawyer
Publikováno v:
Medical History
Les pratiques des saignees au XIX e siecle ont developpe un commerce de sangsues que des pharmaciens importaient directement du Sud de l'Inde par bateau
Publikováno v:
Blood Coagulation & Fibrinolysis. 8:291-295
The blood-sucking leech, Haementeria ghilianii, has evolved a number of agents that attenuate haemostasis. Recently we have isolated a potent inhibitor of factor XIIIa, tridegin, in the salivary glands which is almost certainly involved in feeding. A