Phytophthora caryaesp. nov., a new species recovered from streams and rivers in the eastern United States

2016 ◽  
Vol 66 (5) ◽  
pp. 805-817 ◽  
Author(s):  
N. J. Brazee ◽  
X. Yang ◽  
C. X. Hong
1997 ◽  
Vol 129 (1) ◽  
pp. 81-91 ◽  
Author(s):  
Peter H. Adler ◽  
Peter G. Mason

AbstractA 5-year study of the black flies of east-central Saskatchewan revealed 21 species, including Simulium incognitum sp.nov. Chromosomal and ecological evidence for reproductive isolation is presented for this new species, formerly known as S. venustum Say CC4, and S. venustum Say CC. All 21 species in the study are associated with productive streams and rivers. As many as nine of these species might comprise the pest assemblage harassing livestock. The major pest, S. luggeri Nicholson and Mickel, is cytologically distinct from populations in the eastern United States on the basis of a two-step, Y-linked inversion in the IIS chromosomal arm. Simulium luggeri is the only livestock pest that breeds almost solely in large streams and rivers. The other eight probable pests breed entirely or partly in streams less than 10 m wide, often below beaver dams, suggesting that management efforts should specifically target these sites.


2008 ◽  
Vol 285 (2) ◽  
pp. 203-211 ◽  
Author(s):  
Chuanxue Hong ◽  
Mannon E. Gallegly ◽  
Patricia A. Richardson ◽  
Ping Kong ◽  
Gary W. Moorman

2019 ◽  
Vol 105 (4) ◽  
pp. 587 ◽  
Author(s):  
Anna J. Phillips ◽  
Ricardo Salas-Montiel ◽  
Sebastian Kvist ◽  
Alejandro Oceguera-Figueroa

1927 ◽  
Vol 59 (5) ◽  
pp. 116-120 ◽  
Author(s):  
J. McDunnough

In a pamphlet entitled “Burrowing Mayflies of Our Larger Lakes and Streams,” published in 1920 in the Bulletin United States Bureau of Fisheries, Vol. XXXVI, pp. 269-292, Professor Needham, discussing the species of the genus Hexagenia, makes the statement (op. cit. p. 279) that he is “unable to recognize more than two good and distinct species in the Eastern United States—a lowland species from lakes and rivers, Hexagenia bilineata Say. and an upland bog-stream species, H. recurvata Morg.” He amplifies this statement in previous paragraphs (p. 278) by applying the name bilineata Say. “to all the variants of the species that occupies the beds of our larger lakes and streams. The color differences appear to be only differences of degree. Even the differences of male genitalia—usually our ultimate criteria of species—are intergradient.”


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