. Bulletin of the British Museum (Natural History), Geology. . 25 & OTHERS OTHERS D E Fig. 28 Local examples of the Stropheodontid Parallel Communities, using data from A, Hurst (1975c); B, D, Hurst (19756); C, this report; and E, USNM 11357, 11364, 11630. 1 - Isorthis clivosa Walmsley; 2-1. crassa (Lindstrom); 3-/. canaliculata (Lindstrom); 4-1. cf. arcuaria (Hall & Clarke); 5 - Dalejina hybrida (Sowerby); 6-Dalejina sp.; 7 - Mesopholidostrophia laevigata (Sowerby); 8 - Brachyprion sp.; 9 - Mesopholidostrophia sp.; 10 - Strophonella euglypha (Hisinger); 11 - Amphistwphia funiculata (M
. Bulletin of the British Museum (Natural History), Geology. . 25 & OTHERS OTHERS D E Fig. 28 Local examples of the Stropheodontid Parallel Communities, using data from A, Hurst (1975c); B, D, Hurst (19756); C, this report; and E, USNM 11357, 11364, 11630. 1 - Isorthis clivosa Walmsley; 2-1. crassa (Lindstrom); 3-/. canaliculata (Lindstrom); 4-1. cf. arcuaria (Hall & Clarke); 5 - Dalejina hybrida (Sowerby); 6-Dalejina sp.; 7 - Mesopholidostrophia laevigata (Sowerby); 8 - Brachyprion sp.; 9 - Mesopholidostrophia sp.; 10 - Strophonella euglypha (Hisinger); 11 - Amphistwphia funiculata (M'Coy); 12- A. (M'Coy); 13 - Protochonetes minimus (Sowerby); 14-'Chonetes' jerseyensis Hall; 15 - Leptaena depressa (Sowerby); 16 - Gypidula galeata (Dalman); 17 - Gypidula lata Alexander; 18 - Gypidula sp.; 19 - Atrypa reticularis (Lin- naeus); 20 - Eospirifer radiatus (Sowerby); 21 - Striispirifer striolatus (Lindstrom); 22 - Delthyris sp.; 23 - Sphaerirhynchia wilsoni (Sowerby); 24 - Ancillotoechia bidentata (Hisinger); 25 - 'Camaro- toechid! nucula (Sowerby); 26 - Ferganella sp. throughout Silurian time as relatively steady-state levels of diversity within level-bottom com- munities. Parallel communities (Thorson 1957) are characterized by recurrent associations of genera on a nearly world-wide scale, and are well developed among Silurian brachiopods (Boucot 1975). Within Silurian proximal shelf faunas, a replacement from Lower Llandovery through to Pridoli. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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