Plagionephrodes laqueus praelaqueus, Casier & Olempska, 2008

Casier, Jean-Georges & Olempska, Ewa, 2008, Early Frasnian ostracods from the Arche quarry (Dinant Synclinorium, Belgium) and the Palmatolepis punctata Isotopic Event, Acta Palaeontologica Polonica 53 (4), pp. 635-646 : 646

Family Ropolonellidae Coryell and Malkin, 1936

Plagionephrodes laqueus praelaqueus ssp. nov. ( Fig. 3L–N ) Plagionephrodes ineptus Becker, 1971 ( Fig. 3O )

Family Thlipsuridae Ulrich, 1894

Favulella lecomptei Becker, 1971 ( Fig. 4B )

Family Quasillitidae Coryell and Malkin, 1936

Jenningsina lethiersi Becker, 1971 ( Fig. 4A )

Family Bufinidae Sohn and Stover, 1961

Punctomosea weyanti Becker, 1971

Suborder Podocopina Sars, 1866

Family Pachydomellidae Berdan and Sohn, 1961

Microcheilinella archensis sp. nov. ( Fig. 4F–J ).

Family Bairdiocyprididae Shaver, 1961

Bairdiocypris sp. 5 sensu Magne (1964) ( Fig. 4C )

Bairdiocypris sp. C . ( Fig. 4D, E )

Healdianella ? sp. B in Becker (1971) ( Fig. 4K )

Family Bairdiidae Sars, 1888

Bairdia (Rectobairdia) paffrathensis Kummerow, 1953 ( Fig. 4L ) Bairdia (Rectobairdia) chalonensis sp. nov. ( Fig. 4M–O )

Bairdia (Orthobairdia) sp. B in Becker (1971) ( Fig. 5A )

Bairdiacypris sp. B , aff. B. martinae Casier and Lethiers, 1997 ( Fig. 5B ) Bairdiacypris sp. D ( Fig. 5C )

Bairdiacypris sp. indet. ( Fig. 5D )

Bairdiacypris breuxensis Casier and Olempska, 2008 ( Fig. 5E ) Schneideria groosae Becker, 1971 ( Fig. 5H )

Family Acratiidae Gründel, 1962

Acratia evlanensis Egorov, 1953 ( Fig. 5F )

Acratia sp. indet. ( Fig. 5G )

Figures

Fig. 3. Early Frasnian ostracods from the access path to the Arche quarry, Dinant Synclinorium, Belgium. A, B. Refrathella incompta Becker, 1971. A. Carapace in right (A) and dorsal (A) views. Sample AR−06−28. IRScNB n° b5055. B. Left valve. Sample AR−06−26. IRScNB n° b5056. C–E. Uchtovia 1 2 materni Becker, 1971. C. Heteromorph carapace in left lateral view. Sample AR−06−26. IRScNB n° b5057. D. Heteromorph carapace in dorsal view. Sample AR−06−28. IRScNB n° b5058. E. Tecnomorph carapace in dorsal view. Sample AR−06−28. IRScNB n° b5059. F, G. Hypotetragona tremula Becker, 1971. F. Heteromorph carapace in left lateral view. Sample AR−06−23. IRScNB n° b5060. G. Tecnomorph carapace in dorsal view. Sample AR−06−28. IRScNB n° b5061. H–J. Scobicula gracilis sp. nov. H. Holotype. Carapace in left lateral (H) and dorsal (H) views. Sample AR−06−20. IRScNB n° b5062. 1 2 I. Carapace in left lateral view. Sample NI−07−136 from the Sourd d’Ave Member in the Nismes section. IRScNB n° b5063. J. Carapace in left lateral view. Sample NI−07−12 from the Chalon Member in the Nismes section. IRScNB n° b5064.K. Cavellina? sp. A. Carapace in left (K) and dorsal (K) views. Sam1 2 ple AR−06−26. IRScNB n° b5065. L–N. Plagionephrodes laqueus praelaqueus ssp. nov. L. Holotype. Carapace in right lateral (L) and dorsal (L) views. 1 2 Sample AR−06−27. IRScNB n° b5066. M. Internal view of right valve. Sample AR−06−17. IRScNB n° b5068. N. Internal view of left valve. Sample AR−06−18. IRScNB n° b5069. O. Plagionephrodes ineptus Becker, 1971. Carapace in right (O) and dorsal (O) views. Sample AR−06−28. IRScNB n° 1 2 b5070. Scale bar 200 µm.

Fig. 4. Early Frasnian ostracods from the access path to the Arche quarry, Dinant Synclinorium, Belgium. A. Jenningsina lethiersi Becker, 1971. Poorly preserved carapace in right lateral view. Sample AR−06−26. IRScNB n° b5071. B. Favulella lecomptei Becker, 1971. Carapace in right (B1) and dorsal (B2) views. Sample AR−06−26. IRScNB n° b5072. C. Bairdiocypris sp. 5 sensu Magne (1964). Poorly preserved carapace in right (C) and ventral (C) views. Sample 1 2 AR−06−17. IRScNB n° b5073. D, E. Bairdiocypris sp. C. D. Broken carapace in right lateral view. Sample AR−06−26.IRScNB n° b5074. E. Broken carapace in dorsal view. Sample AR−06−26. IRScNB n° b5075. F–J. Microcheilinella archensis sp. nov. F. Carapace in right lateral (F) and dorsal (F) views. Sample 1 2 AR−06−26. IRScNB n° b5076. G. Holotype. Carapace in right lateral view. Sample AR−06−27. IRScNB n° b5077. H. Carapace in right lateral view. Sample AR−06−28. IRScNB n° b5078. I. Ventral view of a carapace. Sample AR−06−27. IRScNB n° b5079. J. Anterior (J) and posterior (J) views of a carapace. Sam1 2 ple AR−06−28. IRScNB n° b5080. K. Healdianella? sp. B in Becker (1971). Carapace in right (K) and dorsal (K) views. Sample AR−06−28.IRScNB n° b5081. 1 2 L. Bairdia (Rectobairdia) paffrathensis Kummerow, 1953.Poorly preserved carapace in right lateral view. Sample AR−06−23.IRScNB n° b5082. M–O. Bairdia (Rectobairdia) chalonensis sp. nov. M. Holotype. Carapace in right lateral (M) and dorsal (M) views. Sample AR−06−23. IRScNB n° b5083. N. Carapace in 1 2 right lateral view. Sample AR−06−26. IRScNB n° b5084. O. Carapace in right lateral view. Sample AR−06−26. IRScNB n° b5085. Scale bars 200 µm.

Fig. 5. Early Frasnian ostracods from the access path to the Arche quarry, Dinant Synclinorium, Belgium. A. Bairdia (Orthobairdia) sp. B in Becker (1971). Carapace in right (A) and dorsal (A) views. Sample AR−06−23. IRScNB n° b5086. B. Bairdiacypris sp. B, aff. B. martinae Casier and Lethiers, 1997. Car1 2 apace in right (B) and dorsal (B) views. Sample AR−06−28. IRScNB n° b5087. C. Bairdiacypris sp. D. Poorly preserved carapace in right (C) and dorsal 1 2 1 (C) views. Sample AR−06−25. IRScNB n° b5088. D. Bairdiacypris sp. indet. Poorly preserved carapace in right (D) and dorsal (D) views. Sample 2 1 2 AR−06−28. IRScNB n° b5089. E. Bairdiacypris breuxensis Casier and Olempska, 2008. Carapace in right lateral view. Sample AR−06−26. IRScNB n° b5090. F. Acratia evlanensis Egorov, 1953. Poorly preserved carapace in right lateral view. Sample AR−06−23. IRScNB n° b5091. G. Acratia sp. indet. Carapace in right lateral view. Sample AR−06−27. IRScNB n° b5092. H. Schneideria groosae Becker, 1971. Carapace in right lateral view. Sample AR−06−28. IRScNB n° b5093. I–M. Cryptophyllus materni (Bassler and Kellett, 1934). I. Valve. Sample AR−06−26. IRScNB n° b5094. J. Valve. Sample AR−06−26. IRScNB n° b5095. K. Internal view of a valve. Sample AR−06−27. IRScNB n° b5096. L. Broken valve showing the stack of moults. Sample AR−06−26. IRScNB n° b5097. M. Carapace in dorsal view. Sample AR−06−27. IRScNB n° b5098. N. Cryptophyllus sp. A. Valve in lateral (N) and dorsal 1 (N) views. Sample AR−06−23. IRScNB n° b5099. Scale bars 200 µm.