caa a22 4500 388017325 CHVBK 20180307124914.0 cr unu---uuuuu 161130e199803 xx s 000 0 eng 10.1017/S0022336000036210 doi S0022336000036210 pii (NATIONALLICENCE)cambridge-10.1017/S0022336000036210 Two new genera of Upper Silurian actinostromatid stromatoporoids [Elektronische Daten] [Carl W. Stock, Judith A. Burry-Stock] Two new genera of Upper Silurian stromatoporoids in order Actinostromatida are described. Genus Bicolumnostratum Stock, with type species B. micum (Bogoyavlenskaya), is characterized by two kinds of pillars and nonaligned colliculi, and is assigned to family Actinostromatidae. Genus Acosmostroma Stock, with type species A. ataxium Stock new species, contains irregular micropillars and microcolliculi, and is assigned to family Densastromatidae. Two additional new species are Acosmostroma glascoense Stock and A.? cobleskillense Stock. A fourth species is A. tenuissimum (Parks). Bicolumnostratum is known from Ludlow- and Pridoli-age strata, whereas the occurrences of Acosmostroma are strictly Pridoli in age. Copyright © The Paleontological Society Stock Carl W. Department of Geology, The University of Alabama, Tuscaloosa 35487-0338 <cstock@wgs.geo.ua.edu> aut Burry-Stock Judith A. Program in Educational Research, The University of Alabama, Tuscaloosa 35487-0231 <jburry@bamaed.ua.edu> aut Journal of Paleontology Cambridge University Press 72/2(1998-03), 190-201 0022-3360 72:2<190 1998 72 JPA https://doi.org/10.1017/S0022336000036210 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022336000036210 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Stock Carl W. Department of Geology, The University of Alabama, Tuscaloosa 35487-0338 <cstock@wgs.geo.ua.edu> aut NATIONALLICENCE 700 1- Burry-Stock Judith A. Program in Educational Research, The University of Alabama, Tuscaloosa 35487-0231 <jburry@bamaed.ua.edu> aut NATIONALLICENCE 773 0- Journal of Paleontology Cambridge University Press 72/2(1998-03), 190-201 0022-3360 72:2<190 1998 72 JPA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge