scholarly journals North American Paleozoic land snails with a summary of other Paleozoic nonmarine snails

1979 ◽  
Author(s):  
Alan Solem ◽  
Ellis Leon Yochelson
Keyword(s):  
North American ◽  
Land Snails

New land snails (Archaeogastropoda, Helicinidae) from the Miocene (Early Barstovian) Flint Creek beds of western Montana

1989 ◽  
Vol 63 (6) ◽  
pp. 846-851 ◽  
Author(s):  
Harold G. Pierce ◽  
Donald L. Rasmussen
Keyword(s):  
North American ◽  
Land Snails ◽  
Western Montana ◽  
Vertebrate Fauna ◽  
Climatic Cooling

Waldemaria monticola Pierce n. sp. and “Hendersonia” valida Pierce n. sp. are described from fluviatile sediments of the intermontane Flint Creek Basin of western Montana. The genus Waldemaria was previously known only from Japan. The presence of these two genera suggest a marked climatic cooling when compared with western North American Eocene–Oligocene faunas. The stratigraphy of the Flint Creek beds, and the associated vertebrate fauna, diagnostic of an early Barstovian age (17–15 Ma), is summarized.

Molecular Phylogeny, Evolution of Shell Shape, and DNA Barcoding in Polygyridae (Gastropoda: Pulmonata), an Endemic North American Clade of Land Snails

2014 ◽  
Vol 32 (1) ◽  
pp. 1-31 ◽  
Author(s):  
Kathryn E. Perez ◽  
Nicholas Defreitas ◽  
John Slapcinsky ◽  
Russell L. Minton ◽  
Frank E. Anderson ◽  
...  
Keyword(s):  
Molecular Phylogeny ◽  
Dna Barcoding ◽  
North American ◽  
Land Snails ◽  
Shell Shape ◽  
American Clade

Interpretation of Oxygen Isotopic Values of North American Land Snails

2014 ◽  
Vol 13 ◽  
pp. 93-93
Author(s):  
Nasser M. Al-Qattan ◽  
Jason A. Rech ◽  
Jeffrey S. Pigati ◽  
Jeffrey C. Nekola ◽  
Yurena Yanes
Keyword(s):  
North American ◽  
Land Snails ◽  
Oxygen Isotopic

Adaptation of the Connected Speech Test: Rerecording and Passage Equivalency

2020 ◽  
Vol 29 (2) ◽  
pp. 259-264 ◽  
Author(s):  
Hasan K. Saleh ◽  
Paula Folkeard ◽  
Ewan Macpherson ◽  
Susan Scollie
Keyword(s):  
Speech Perception ◽  
North American ◽  
First Language ◽  
Intraclass Correlation ◽  
Normal Hearing ◽  
Connected Speech ◽  
Internal Reliability ◽  
Speech Test ◽  
The Mean ◽  
Unit Standard

Purpose The original Connected Speech Test (CST; Cox et al., 1987) is a well-regarded and often utilized speech perception test. The aim of this study was to develop a new version of the CST using a neutral North American accent and to assess the use of this updated CST on participants with normal hearing. Method A female English speaker was recruited to read the original CST passages, which were recorded as the new CST stimuli. A study was designed to assess the newly recorded CST passages' equivalence and conduct normalization. The study included 19 Western University students (11 females and eight males) with normal hearing and with English as a first language. Results Raw scores for the 48 tested passages were converted to rationalized arcsine units, and average passage scores more than 1 rationalized arcsine unit standard deviation from the mean were excluded. The internal reliability of the 32 remaining passages was assessed, and the two-way random effects intraclass correlation was .944. Conclusion The aim of our study was to create new CST stimuli with a more general North American accent in order to minimize accent effects on the speech perception scores. The study resulted in 32 passages of equivalent difficulty for listeners with normal hearing.

Sign in / Sign up

Export Citation Format

Share Document