taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
F77987B8FFB6FF9B11E0CE77AE82F955.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243957/files/figure.png	https://doi.org/10.5281/zenodo.17243957	FIG. 5. — Type specimens of Alphacheles zeta (Rathbun, 1936) n. comb. from the upper Danian Porters Creek Formation of the Prairie Creek region, Wilcox County, Alabama: A-D, outer, inner, upper marginal, and lower marginal views of major right propodus of holotype (USNM MO 371506); E, F, outer and inner views of left major propodus of paratype (USNM PAL 336022 A); G, frontal view of holotype; H, lower margin view of paratype (USNM PAL 336022 A); I-L, outer and inner views of left major propodi of paratypes (USNM PAL 336022 B); M, outer view of right major propodus of paratype (USNM PAL 336022 B); N, O, outer and inner views of right major propodus of paratype and minor propodus with dactylus (USNM PAL 336022 B). Scale bars: 2.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 5. — Type specimens of Alphacheles zeta (Rathbun, 1936) n. comb. from the upper Danian Porters Creek Formation of the Prairie Creek region, Wilcox County, Alabama: A-D, outer, inner, upper marginal, and lower marginal views of major right propodus of holotype (USNM MO 371506); E, F, outer and inner views of left major propodus of paratype (USNM PAL 336022 A); G, frontal view of holotype; H, lower margin view of paratype (USNM PAL 336022 A); I-L, outer and inner views of left major propodi of paratypes (USNM PAL 336022 B); M, outer view of right major propodus of paratype (USNM PAL 336022 B); N, O, outer and inner views of right major propodus of paratype and minor propodus with dactylus (USNM PAL 336022 B). Scale bars: 2.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFBAFF9912DFCC15AE42F872.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243957/files/figure.png	https://doi.org/10.5281/zenodo.17243957	FIG. 5. — Type specimens of Alphacheles zeta (Rathbun, 1936) n. comb. from the upper Danian Porters Creek Formation of the Prairie Creek region, Wilcox County, Alabama: A-D, outer, inner, upper marginal, and lower marginal views of major right propodus of holotype (USNM MO 371506); E, F, outer and inner views of left major propodus of paratype (USNM PAL 336022 A); G, frontal view of holotype; H, lower margin view of paratype (USNM PAL 336022 A); I-L, outer and inner views of left major propodi of paratypes (USNM PAL 336022 B); M, outer view of right major propodus of paratype (USNM PAL 336022 B); N, O, outer and inner views of right major propodus of paratype and minor propodus with dactylus (USNM PAL 336022 B). Scale bars: 2.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 5. — Type specimens of Alphacheles zeta (Rathbun, 1936) n. comb. from the upper Danian Porters Creek Formation of the Prairie Creek region, Wilcox County, Alabama: A-D, outer, inner, upper marginal, and lower marginal views of major right propodus of holotype (USNM MO 371506); E, F, outer and inner views of left major propodus of paratype (USNM PAL 336022 A); G, frontal view of holotype; H, lower margin view of paratype (USNM PAL 336022 A); I-L, outer and inner views of left major propodi of paratypes (USNM PAL 336022 B); M, outer view of right major propodus of paratype (USNM PAL 336022 B); N, O, outer and inner views of right major propodus of paratype and minor propodus with dactylus (USNM PAL 336022 B). Scale bars: 2.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFBAFF9912DFCC15AE42F872.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243959/files/figure.png	https://doi.org/10.5281/zenodo.17243959	FIG. 6. — Alphacheles zeta (Rathbun, 1936) n. comb. from the lower Danian Pine Barren Member (Clayton Formation) at the roadcut of Mussel Creek, Lowndes County, Alabama: A-D, outer,inner, upper marginal,and lower marginal views of major left propodus (ALMNH:Paleo:21511);E, F, outer and inner views of partial propodus and dactylus (MMNS IP-7255.1); G, frontal view of major left propodus (ALMNH:Paleo:21511); H, partial occlusal view of dactylus (MMNS IP-7255.1); I, upper marginal view of dactylus (MMNS IP-7255.1); J, occlusal view of fixed finger (UF 303822); K, L, outer and inner views of propodus and partial dactylus (MMNS IP-7255.2). Scale bars: A-J, 2.0 mm; K, L, 5.0 mm.Credits: photos by Adiël A. Klompmaker.	FIG. 6. — Alphacheles zeta (Rathbun, 1936) n. comb. from the lower Danian Pine Barren Member (Clayton Formation) at the roadcut of Mussel Creek, Lowndes County, Alabama: A-D, outer,inner, upper marginal,and lower marginal views of major left propodus (ALMNH:Paleo:21511);E, F, outer and inner views of partial propodus and dactylus (MMNS IP-7255.1); G, frontal view of major left propodus (ALMNH:Paleo:21511); H, partial occlusal view of dactylus (MMNS IP-7255.1); I, upper marginal view of dactylus (MMNS IP-7255.1); J, occlusal view of fixed finger (UF 303822); K, L, outer and inner views of propodus and partial dactylus (MMNS IP-7255.2). Scale bars: A-J, 2.0 mm; K, L, 5.0 mm.Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFBFFF821145CAB2AA81FEAB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243965/files/figure.png	https://doi.org/10.5281/zenodo.17243965	FIG. 8. — Type specimens of Eucalliaxiopsis alabamensis (Rathbun, 1935a) n. comb. from the upper Danian Porters Creek Formation from the Prairie Creek and Pine Barren section, Wilcox County, Alabama: A-E, outer, inner, frontal, lower marginal, and upper marginal views of major right propodus of holotype (USNM MO 371505); F-K, outer and inner views of right (2×) and left major propodi of paratypes (USNM PAL 327231); L-O, outer, inner, upper marginal, and occlusal views of right dactylus of paratype (USNM PAL 327231 A). Scale bars: 5.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 8. — Type specimens of Eucalliaxiopsis alabamensis (Rathbun, 1935a) n. comb. from the upper Danian Porters Creek Formation from the Prairie Creek and Pine Barren section, Wilcox County, Alabama: A-E, outer, inner, frontal, lower marginal, and upper marginal views of major right propodus of holotype (USNM MO 371505); F-K, outer and inner views of right (2×) and left major propodi of paratypes (USNM PAL 327231); L-O, outer, inner, upper marginal, and occlusal views of right dactylus of paratype (USNM PAL 327231 A). Scale bars: 5.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFBFFF821145CAB2AA81FEAB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243970/files/figure.png	https://doi.org/10.5281/zenodo.17243970	FIG. 9. — Eucalliaxiopsis alabamensis (Rathbun, 1935a) n. comb. from the lower Danian Pine Barren Member (Clayton Formation) at the roadcut of Mussel Creek, Lowndes County, Alabama: A-E, outer, inner, frontal, upper marginal, and lower marginal views of major right propodus (ALMNH:Paleo:21509); F-I, outer, inner, lower marginal, and occlusal views of left fixed finger (MMNS IP-7256.4); J-M, outer, inner, upper marginal, and occlusal views of robust left dactylus (MMNS IP-7256.6); N-Q, outer, inner, upper marginal, and occlusal views of slender right dactylus (UF 303857); R-U, outer, inner, upper marginal, and occlusal views of elongated, slender left dactylus (MMNS IP-7256.3); V, frontal view of right partial propodus and dactylus (ALMNH:Paleo:21549). Scale bars: 5.0 mm.Credits: photos by Adiël A. Klompmaker.	FIG. 9. — Eucalliaxiopsis alabamensis (Rathbun, 1935a) n. comb. from the lower Danian Pine Barren Member (Clayton Formation) at the roadcut of Mussel Creek, Lowndes County, Alabama: A-E, outer, inner, frontal, upper marginal, and lower marginal views of major right propodus (ALMNH:Paleo:21509); F-I, outer, inner, lower marginal, and occlusal views of left fixed finger (MMNS IP-7256.4); J-M, outer, inner, upper marginal, and occlusal views of robust left dactylus (MMNS IP-7256.6); N-Q, outer, inner, upper marginal, and occlusal views of slender right dactylus (UF 303857); R-U, outer, inner, upper marginal, and occlusal views of elongated, slender left dactylus (MMNS IP-7256.3); V, frontal view of right partial propodus and dactylus (ALMNH:Paleo:21549). Scale bars: 5.0 mm.Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFBFFF821145CAB2AA81FEAB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243976/files/figure.png	https://doi.org/10.5281/zenodo.17243976	FIG. 10. — Eucalliaxiopsis alabamensis (Rathbun, 1935a) n. comb. from the lower Danian Pine Barren Member (Clayton Formation) at the roadcut of Mussel Creek, Lowndes County, Alabama (MMNS IP-7251): A, right major cheliped with, from left to right, the merus, carpus, propodus, and dactylus; B, counterpart. In situ nodule with specimen found c. 9.8 m above K-Pg boundary. Scale bars: 10.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 10. — Eucalliaxiopsis alabamensis (Rathbun, 1935a) n. comb. from the lower Danian Pine Barren Member (Clayton Formation) at the roadcut of Mussel Creek, Lowndes County, Alabama (MMNS IP-7251): A, right major cheliped with, from left to right, the merus, carpus, propodus, and dactylus; B, counterpart. In situ nodule with specimen found c. 9.8 m above K-Pg boundary. Scale bars: 10.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFA3FF83119BC9B2AB33FB37.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243978/files/figure.png	https://doi.org/10.5281/zenodo.17243978	FIG. 11. — “Paguristes” johnsoni Rathbun,1935a,from the lower Danian Pine Barren Member (Clayton Formation) at the roadcut of Mussel Creek,Lowndes County, Alabama (A-N), the upper Danian Porters Creek Formation at Black Bluff,Sumter County,Alabama (O, Q, R), and the upper Danian Porters Creek Formation in Wilcox County,Alabama (P):A, B, outer and inner views of right propodus (ALMNH:Paleo:21483);C, D, bases of fixed finger and dactylus (ALMNH:Paleo:21483);E-H, outer, inner, occlusal, and upper margin views of right dactylus (ALMNH:Paleo:21487); I, J, inner and occlusal views of possible left fixed finger (ALMNH:Paleo:21486); K-N, outer, inner, lower, and proximal views of left merus (ALMMH:Paleo:21555); O, P, outer views of right propodi (ALMNH:Paleo:21495 and GSA-I20984); Q, R, occlusal views of right dactyli (GSA-I21012 and ALMNH:Paleo:21496). Scale bars: 2.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 11. — “Paguristes” johnsoni Rathbun,1935a,from the lower Danian Pine Barren Member (Clayton Formation) at the roadcut of Mussel Creek,Lowndes County, Alabama (A-N), the upper Danian Porters Creek Formation at Black Bluff,Sumter County,Alabama (O, Q, R), and the upper Danian Porters Creek Formation in Wilcox County,Alabama (P):A, B, outer and inner views of right propodus (ALMNH:Paleo:21483);C, D, bases of fixed finger and dactylus (ALMNH:Paleo:21483);E-H, outer, inner, occlusal, and upper margin views of right dactylus (ALMNH:Paleo:21487); I, J, inner and occlusal views of possible left fixed finger (ALMNH:Paleo:21486); K-N, outer, inner, lower, and proximal views of left merus (ALMMH:Paleo:21555); O, P, outer views of right propodi (ALMNH:Paleo:21495 and GSA-I20984); Q, R, occlusal views of right dactyli (GSA-I21012 and ALMNH:Paleo:21496). Scale bars: 2.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFA0FF871338CAD2AB21FB16.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243980/files/figure.png	https://doi.org/10.5281/zenodo.17243980	FIG. 12. — Raninoides danicus n. sp. from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek, Lowndes County, Alabama: A-D, dorsal, ventral, right lateral, and frontal views of holotype ALMNH:Paleo:21488; E, dorsal view of paratype ALMNH:Paleo:21492; F, dorsal view, focused on the left frontal margin, of paratype ALMNH:Paleo:21491; G-I, right orbital, upper orbital margin, and lower orbital margin views of paratype ALMN- H:Paleo:5919. Scale bars: A-E, 5.0 mm; G-I, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 12. — Raninoides danicus n. sp. from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek, Lowndes County, Alabama: A-D, dorsal, ventral, right lateral, and frontal views of holotype ALMNH:Paleo:21488; E, dorsal view of paratype ALMNH:Paleo:21492; F, dorsal view, focused on the left frontal margin, of paratype ALMNH:Paleo:21491; G-I, right orbital, upper orbital margin, and lower orbital margin views of paratype ALMN- H:Paleo:5919. Scale bars: A-E, 5.0 mm; G-I, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFA0FF871338CAD2AB21FB16.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243982/files/figure.png	https://doi.org/10.5281/zenodo.17243982	FIG. 13. — Raninoides danicus n. sp. from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek, Lowndes County, Alabama: A, ventral view of MMNS IP-8792; B, dorsal view of MMNS IP-7252.1; C, dorsal view of MMNS IP-7253.1; D, right posterolateral view of holotype ALMNH:Paleo:21488; E, ventral view focused on sternites 3-4 of paratype ALMNH:Paleo:21490; F, left posterolateral view of paratype ALMNH:Paleo:21489; G, frontal view of sternite 3 of paratype ALMNH:Paleo:21490. Scale bars: 5.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 13. — Raninoides danicus n. sp. from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek, Lowndes County, Alabama: A, ventral view of MMNS IP-8792; B, dorsal view of MMNS IP-7252.1; C, dorsal view of MMNS IP-7253.1; D, right posterolateral view of holotype ALMNH:Paleo:21488; E, ventral view focused on sternites 3-4 of paratype ALMNH:Paleo:21490; F, left posterolateral view of paratype ALMNH:Paleo:21489; G, frontal view of sternite 3 of paratype ALMNH:Paleo:21490. Scale bars: 5.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFA4FF8A12C3CED6ACC7F915.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243987/files/figure.png	https://doi.org/10.5281/zenodo.17243987	FIG. 14. — Costacopluma grayi Feldmann & Portell, 2007, from the Eocene (upper Ypresian-lower Lutetian) Tallahatta Formation in Alabama: A-C, dorsal views of ALMNH:Paleo:20598B, MMNS IP-10046.1, and MMNS IP-11213; D, right propodus and dactylus of UF 287266; E, F, frontal views of UF 171033 and ALMN- H:Paleo:20598B; G, H, ventral views including male pleon of MMNS IP-11213. Scale bars: 5.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 14. — Costacopluma grayi Feldmann & Portell, 2007, from the Eocene (upper Ypresian-lower Lutetian) Tallahatta Formation in Alabama: A-C, dorsal views of ALMNH:Paleo:20598B, MMNS IP-10046.1, and MMNS IP-11213; D, right propodus and dactylus of UF 287266; E, F, frontal views of UF 171033 and ALMN- H:Paleo:20598B; G, H, ventral views including male pleon of MMNS IP-11213. Scale bars: 5.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFA4FF8A12C3CED6ACC7F915.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243989/files/figure.png	https://doi.org/10.5281/zenodo.17243989	FIG. 15. — Carapace ratios of Costacopluma spp. versus specimen size: A, length-width ratios; B, rostral width-maximum carapace width ratios. See Table 1 for measurements.	FIG. 15. — Carapace ratios of Costacopluma spp. versus specimen size: A, length-width ratios; B, rostral width-maximum carapace width ratios. See Table 1 for measurements.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFA4FF8A12C3CED6ACC7F915.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17244008/files/figure.png	https://doi.org/10.5281/zenodo.17244008	APPENDIX 1. — Figure with ventral and some dorsal characters used to describe brachyurans in this study: A, dorsal view of Costacopluma nicksabani n. sp. (ALMNH:Paleo:21454,paratype);B, C, ventral views including male pleon of C. nicksabani n. sp.(ALMNH:Paleo:21453,holotype);D, ventral view including female pleon of C. nicksabani n. sp. (MMNS IP-6480); E, posterior view of C. nicksabani n. sp. (ALMNH:Paleo:21457, paratype); F, ventral view including male pleon of C. grayi Feldmann & Portell, 2007 (MMNS IP-11213); G, ventral view including male pleon of C. texana (MMNS IP-7396.2); H, ventral view of female individual of C. texana (MMNS IP-7396.1);I, J, ventral and right lateral views of Raninoides danicus n. sp.(ALMNH:Paleo:21488,holotype);K, ventral view including female pleon of Alahexapus martini (Feldmann, Schweitzer & Portell, 2014) n. comb. (MMNS IP-7939); L, ventral view including male pleon of A. martini n. comb. (UF 254040). Abbreviations: bc, buccal collar; bs, branchiostegite; cx, coxa of maxilliped 3; e4, e5, episternites 4-5; ex, exopod of maxilliped 3; is, ischium of maxilliped 3; me, merus of maxilliped 3; o, oviduct; pl4-pl7, pleurites 4-7; ps1-ps6, pleonal somites 1-6; pt, pterygostome; s1-s7, sternites 1-7; spc, sternopleonal cavity; t, telson. Scale bars: A-J, 5.0 mm; K, L, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	APPENDIX 1. — Figure with ventral and some dorsal characters used to describe brachyurans in this study: A, dorsal view of Costacopluma nicksabani n. sp. (ALMNH:Paleo:21454,paratype);B, C, ventral views including male pleon of C. nicksabani n. sp.(ALMNH:Paleo:21453,holotype);D, ventral view including female pleon of C. nicksabani n. sp. (MMNS IP-6480); E, posterior view of C. nicksabani n. sp. (ALMNH:Paleo:21457, paratype); F, ventral view including male pleon of C. grayi Feldmann & Portell, 2007 (MMNS IP-11213); G, ventral view including male pleon of C. texana (MMNS IP-7396.2); H, ventral view of female individual of C. texana (MMNS IP-7396.1);I, J, ventral and right lateral views of Raninoides danicus n. sp.(ALMNH:Paleo:21488,holotype);K, ventral view including female pleon of Alahexapus martini (Feldmann, Schweitzer & Portell, 2014) n. comb. (MMNS IP-7939); L, ventral view including male pleon of A. martini n. comb. (UF 254040). Abbreviations: bc, buccal collar; bs, branchiostegite; cx, coxa of maxilliped 3; e4, e5, episternites 4-5; ex, exopod of maxilliped 3; is, ischium of maxilliped 3; me, merus of maxilliped 3; o, oviduct; pl4-pl7, pleurites 4-7; ps1-ps6, pleonal somites 1-6; pt, pterygostome; s1-s7, sternites 1-7; spc, sternopleonal cavity; t, telson. Scale bars: A-J, 5.0 mm; K, L, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFABFF8B11FECDD5AD01F875.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243991/files/figure.png	https://doi.org/10.5281/zenodo.17243991	FIG. 16. — Costacopluma texana Armstrong, Nyborg, Bishop, Ossó-Morales & Vega, 2009, from the upper Danian Mexia Clay Member (Wills Point Formation) in Limestone County, Texas: A-D, dorsal views of NPL 31173 (paratype), NPL 31172 (holotype), MMNS IP-7396.3, and MMNS IP-7396.6; E, ventral view with male pleon (MMNS IP-7396.2);F, ventral view of female individual (MMNS IP-7396.1);G, frontal view of MMNS IP-7396.3;H, right lateral view of NPL 31176 (paratype); I, frontal view of NPL 31173 (paratype); J, right propodus and dactylus of NPL 31176 (paratype); K, oval oviduct of female individual (MMNS IP-7396.1); L, partial ventral view of male individual NPL 31175 (paratype), note small press button on sternite 5 on upper part of slope near sternite 4. Scale bars: A-J, 5.0 mm; K, L, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 16. — Costacopluma texana Armstrong, Nyborg, Bishop, Ossó-Morales & Vega, 2009, from the upper Danian Mexia Clay Member (Wills Point Formation) in Limestone County, Texas: A-D, dorsal views of NPL 31173 (paratype), NPL 31172 (holotype), MMNS IP-7396.3, and MMNS IP-7396.6; E, ventral view with male pleon (MMNS IP-7396.2);F, ventral view of female individual (MMNS IP-7396.1);G, frontal view of MMNS IP-7396.3;H, right lateral view of NPL 31176 (paratype); I, frontal view of NPL 31173 (paratype); J, right propodus and dactylus of NPL 31176 (paratype); K, oval oviduct of female individual (MMNS IP-7396.1); L, partial ventral view of male individual NPL 31175 (paratype), note small press button on sternite 5 on upper part of slope near sternite 4. Scale bars: A-J, 5.0 mm; K, L, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFABFF8B11FECDD5AD01F875.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17244008/files/figure.png	https://doi.org/10.5281/zenodo.17244008	APPENDIX 1. — Figure with ventral and some dorsal characters used to describe brachyurans in this study: A, dorsal view of Costacopluma nicksabani n. sp. (ALMNH:Paleo:21454,paratype);B, C, ventral views including male pleon of C. nicksabani n. sp.(ALMNH:Paleo:21453,holotype);D, ventral view including female pleon of C. nicksabani n. sp. (MMNS IP-6480); E, posterior view of C. nicksabani n. sp. (ALMNH:Paleo:21457, paratype); F, ventral view including male pleon of C. grayi Feldmann & Portell, 2007 (MMNS IP-11213); G, ventral view including male pleon of C. texana (MMNS IP-7396.2); H, ventral view of female individual of C. texana (MMNS IP-7396.1);I, J, ventral and right lateral views of Raninoides danicus n. sp.(ALMNH:Paleo:21488,holotype);K, ventral view including female pleon of Alahexapus martini (Feldmann, Schweitzer & Portell, 2014) n. comb. (MMNS IP-7939); L, ventral view including male pleon of A. martini n. comb. (UF 254040). Abbreviations: bc, buccal collar; bs, branchiostegite; cx, coxa of maxilliped 3; e4, e5, episternites 4-5; ex, exopod of maxilliped 3; is, ischium of maxilliped 3; me, merus of maxilliped 3; o, oviduct; pl4-pl7, pleurites 4-7; ps1-ps6, pleonal somites 1-6; pt, pterygostome; s1-s7, sternites 1-7; spc, sternopleonal cavity; t, telson. Scale bars: A-J, 5.0 mm; K, L, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	APPENDIX 1. — Figure with ventral and some dorsal characters used to describe brachyurans in this study: A, dorsal view of Costacopluma nicksabani n. sp. (ALMNH:Paleo:21454,paratype);B, C, ventral views including male pleon of C. nicksabani n. sp.(ALMNH:Paleo:21453,holotype);D, ventral view including female pleon of C. nicksabani n. sp. (MMNS IP-6480); E, posterior view of C. nicksabani n. sp. (ALMNH:Paleo:21457, paratype); F, ventral view including male pleon of C. grayi Feldmann & Portell, 2007 (MMNS IP-11213); G, ventral view including male pleon of C. texana (MMNS IP-7396.2); H, ventral view of female individual of C. texana (MMNS IP-7396.1);I, J, ventral and right lateral views of Raninoides danicus n. sp.(ALMNH:Paleo:21488,holotype);K, ventral view including female pleon of Alahexapus martini (Feldmann, Schweitzer & Portell, 2014) n. comb. (MMNS IP-7939); L, ventral view including male pleon of A. martini n. comb. (UF 254040). Abbreviations: bc, buccal collar; bs, branchiostegite; cx, coxa of maxilliped 3; e4, e5, episternites 4-5; ex, exopod of maxilliped 3; is, ischium of maxilliped 3; me, merus of maxilliped 3; o, oviduct; pl4-pl7, pleurites 4-7; ps1-ps6, pleonal somites 1-6; pt, pterygostome; s1-s7, sternites 1-7; spc, sternopleonal cavity; t, telson. Scale bars: A-J, 5.0 mm; K, L, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFAAFF8D11C7CFF7AEE3F994.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243993/files/figure.png	https://doi.org/10.5281/zenodo.17243993	FIG. 17. — Costacopluma nicksabani n. sp., from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek,Lowndes County, Alabama:A-E, dorsal,ventral (2×),frontal,and left lateral views of male individual,ALMNH:Paleo:21453 (holotype);F, G, dorsal and frontal views of ALMNH:Paleo:21456 (paratype);H, posterior view of ALMNH:Paleo:21457 (paratype),showing male somites 1-2; I, J, dorsal views of ALMNH:Paleo:21454 (paratype) and ALMNH:Paleo:13539 (paratype); K, ventral view with female pleon of ALMNH:Paleo:21458 (paratype);L, ventral view of carapace and long merus of pereiopod 3 of ALMNH:Paleo:21455 (paratype); M, N, oval oviduct and left lateral view of ALMNH:Paleo:13539 (paratype). Scale bars: 5.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 17. — Costacopluma nicksabani n. sp., from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek,Lowndes County, Alabama:A-E, dorsal,ventral (2×),frontal,and left lateral views of male individual,ALMNH:Paleo:21453 (holotype);F, G, dorsal and frontal views of ALMNH:Paleo:21456 (paratype);H, posterior view of ALMNH:Paleo:21457 (paratype),showing male somites 1-2; I, J, dorsal views of ALMNH:Paleo:21454 (paratype) and ALMNH:Paleo:13539 (paratype); K, ventral view with female pleon of ALMNH:Paleo:21458 (paratype);L, ventral view of carapace and long merus of pereiopod 3 of ALMNH:Paleo:21455 (paratype); M, N, oval oviduct and left lateral view of ALMNH:Paleo:13539 (paratype). Scale bars: 5.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFAAFF8D11C7CFF7AEE3F994.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243996/files/figure.png	https://doi.org/10.5281/zenodo.17243996	FIG. 18. — Costacopluma nicksabani n. sp., from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek, Lowndes County, Alabama:A, D, ventral view of female with pleon of MMNS IP-6480; B, E, frontal and ventral views of male of MMNS IP-7940.4; C, F, merus and ischium of cheliped of MMNS IP-7257.4; G, ventral view of female of ALMNH:Paleo:13539 (paratype);H, ventral view with pterygostome and partial buccal area of MMNS IP-7940.2; I, male pleopod pair 1 of MMNS IP-7940.1 (paratype); J, cheliped propodus of UF 247377; K, buccal area of MMNS IP-7940.1 (paratype); L, fixed fingers and dactyli of both chelipeds of UF 247378 (paratype);M, male pleopod pair 1 of UF 303806; N, ventral view of male with small press button on sternite 5 of MMNS IP-7940.2. Scale bars: A, B, D, E, G, H, J, L, 5.0 mm; C, F, I, K, N, 2.0 mm; M, 1.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 18. — Costacopluma nicksabani n. sp., from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek, Lowndes County, Alabama:A, D, ventral view of female with pleon of MMNS IP-6480; B, E, frontal and ventral views of male of MMNS IP-7940.4; C, F, merus and ischium of cheliped of MMNS IP-7257.4; G, ventral view of female of ALMNH:Paleo:13539 (paratype);H, ventral view with pterygostome and partial buccal area of MMNS IP-7940.2; I, male pleopod pair 1 of MMNS IP-7940.1 (paratype); J, cheliped propodus of UF 247377; K, buccal area of MMNS IP-7940.1 (paratype); L, fixed fingers and dactyli of both chelipeds of UF 247378 (paratype);M, male pleopod pair 1 of UF 303806; N, ventral view of male with small press button on sternite 5 of MMNS IP-7940.2. Scale bars: A, B, D, E, G, H, J, L, 5.0 mm; C, F, I, K, N, 2.0 mm; M, 1.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFAAFF8D11C7CFF7AEE3F994.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243980/files/figure.png	https://doi.org/10.5281/zenodo.17243980	FIG. 12. — Raninoides danicus n. sp. from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek, Lowndes County, Alabama: A-D, dorsal, ventral, right lateral, and frontal views of holotype ALMNH:Paleo:21488; E, dorsal view of paratype ALMNH:Paleo:21492; F, dorsal view, focused on the left frontal margin, of paratype ALMNH:Paleo:21491; G-I, right orbital, upper orbital margin, and lower orbital margin views of paratype ALMN- H:Paleo:5919. Scale bars: A-E, 5.0 mm; G-I, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 12. — Raninoides danicus n. sp. from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek, Lowndes County, Alabama: A-D, dorsal, ventral, right lateral, and frontal views of holotype ALMNH:Paleo:21488; E, dorsal view of paratype ALMNH:Paleo:21492; F, dorsal view, focused on the left frontal margin, of paratype ALMNH:Paleo:21491; G-I, right orbital, upper orbital margin, and lower orbital margin views of paratype ALMN- H:Paleo:5919. Scale bars: A-E, 5.0 mm; G-I, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFAAFF8D11C7CFF7AEE3F994.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243982/files/figure.png	https://doi.org/10.5281/zenodo.17243982	FIG. 13. — Raninoides danicus n. sp. from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek, Lowndes County, Alabama: A, ventral view of MMNS IP-8792; B, dorsal view of MMNS IP-7252.1; C, dorsal view of MMNS IP-7253.1; D, right posterolateral view of holotype ALMNH:Paleo:21488; E, ventral view focused on sternites 3-4 of paratype ALMNH:Paleo:21490; F, left posterolateral view of paratype ALMNH:Paleo:21489; G, frontal view of sternite 3 of paratype ALMNH:Paleo:21490. Scale bars: 5.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 13. — Raninoides danicus n. sp. from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek, Lowndes County, Alabama: A, ventral view of MMNS IP-8792; B, dorsal view of MMNS IP-7252.1; C, dorsal view of MMNS IP-7253.1; D, right posterolateral view of holotype ALMNH:Paleo:21488; E, ventral view focused on sternites 3-4 of paratype ALMNH:Paleo:21490; F, left posterolateral view of paratype ALMNH:Paleo:21489; G, frontal view of sternite 3 of paratype ALMNH:Paleo:21490. Scale bars: 5.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFAAFF8D11C7CFF7AEE3F994.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243989/files/figure.png	https://doi.org/10.5281/zenodo.17243989	FIG. 15. — Carapace ratios of Costacopluma spp. versus specimen size: A, length-width ratios; B, rostral width-maximum carapace width ratios. See Table 1 for measurements.	FIG. 15. — Carapace ratios of Costacopluma spp. versus specimen size: A, length-width ratios; B, rostral width-maximum carapace width ratios. See Table 1 for measurements.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFAAFF8D11C7CFF7AEE3F994.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243987/files/figure.png	https://doi.org/10.5281/zenodo.17243987	FIG. 14. — Costacopluma grayi Feldmann & Portell, 2007, from the Eocene (upper Ypresian-lower Lutetian) Tallahatta Formation in Alabama: A-C, dorsal views of ALMNH:Paleo:20598B, MMNS IP-10046.1, and MMNS IP-11213; D, right propodus and dactylus of UF 287266; E, F, frontal views of UF 171033 and ALMN- H:Paleo:20598B; G, H, ventral views including male pleon of MMNS IP-11213. Scale bars: 5.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 14. — Costacopluma grayi Feldmann & Portell, 2007, from the Eocene (upper Ypresian-lower Lutetian) Tallahatta Formation in Alabama: A-C, dorsal views of ALMNH:Paleo:20598B, MMNS IP-10046.1, and MMNS IP-11213; D, right propodus and dactylus of UF 287266; E, F, frontal views of UF 171033 and ALMN- H:Paleo:20598B; G, H, ventral views including male pleon of MMNS IP-11213. Scale bars: 5.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFAAFF8D11C7CFF7AEE3F994.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243991/files/figure.png	https://doi.org/10.5281/zenodo.17243991	FIG. 16. — Costacopluma texana Armstrong, Nyborg, Bishop, Ossó-Morales & Vega, 2009, from the upper Danian Mexia Clay Member (Wills Point Formation) in Limestone County, Texas: A-D, dorsal views of NPL 31173 (paratype), NPL 31172 (holotype), MMNS IP-7396.3, and MMNS IP-7396.6; E, ventral view with male pleon (MMNS IP-7396.2);F, ventral view of female individual (MMNS IP-7396.1);G, frontal view of MMNS IP-7396.3;H, right lateral view of NPL 31176 (paratype); I, frontal view of NPL 31173 (paratype); J, right propodus and dactylus of NPL 31176 (paratype); K, oval oviduct of female individual (MMNS IP-7396.1); L, partial ventral view of male individual NPL 31175 (paratype), note small press button on sternite 5 on upper part of slope near sternite 4. Scale bars: A-J, 5.0 mm; K, L, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 16. — Costacopluma texana Armstrong, Nyborg, Bishop, Ossó-Morales & Vega, 2009, from the upper Danian Mexia Clay Member (Wills Point Formation) in Limestone County, Texas: A-D, dorsal views of NPL 31173 (paratype), NPL 31172 (holotype), MMNS IP-7396.3, and MMNS IP-7396.6; E, ventral view with male pleon (MMNS IP-7396.2);F, ventral view of female individual (MMNS IP-7396.1);G, frontal view of MMNS IP-7396.3;H, right lateral view of NPL 31176 (paratype); I, frontal view of NPL 31173 (paratype); J, right propodus and dactylus of NPL 31176 (paratype); K, oval oviduct of female individual (MMNS IP-7396.1); L, partial ventral view of male individual NPL 31175 (paratype), note small press button on sternite 5 on upper part of slope near sternite 4. Scale bars: A-J, 5.0 mm; K, L, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FFACFFB2133DCDB6AC29F975.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17243998/files/figure.png	https://doi.org/10.5281/zenodo.17243998	FIG. 19. — Palaeoxanthopsidae indet. from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek, Lowndes County, Alabama: A-D, dorsal, right lateral, frontal, and ventral views of ALMNH:Paleo:21482; E-H, outer, inner, lower marginal, and occlusal views of fixed finger of UF 303867; I-L, outer, inner, upper marginal, and occlusal views of dactylus of ALMNH:Paleo:21507. Scale bars: A-D, 10.0 mm; E-L, 5.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 19. — Palaeoxanthopsidae indet. from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek, Lowndes County, Alabama: A-D, dorsal, right lateral, frontal, and ventral views of ALMNH:Paleo:21482; E-H, outer, inner, lower marginal, and occlusal views of fixed finger of UF 303867; I-L, outer, inner, upper marginal, and occlusal views of dactylus of ALMNH:Paleo:21507. Scale bars: A-D, 10.0 mm; E-L, 5.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FF91FFB0135FC971AA81F9B5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17244002/files/figure.png	https://doi.org/10.5281/zenodo.17244002	FIG. 20. — Alahexapus martini (Feldmann, Schweitzer & Portell, 2014) n. comb. from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek,Lowndes County,Alabama:A-C, dorsal, frontal,left lateral views of ALMNH:Paleo:5915;D-F, frontal, partial ventral,and dorsal views of UF 254041;G, ventral view of MMNS IP-7939 with female pleon;H, ventral view of ALMNH:Paleo:21464;I, closeup of maxilliped 3 of MMNS IP-7939;J, K, ventral views of UF 254040 with male pleon; L, view of partially preserved stridulating apparatus (vertical ridges arranged diagonally) of MMNS IP-7939; M, dorsal view of ALMNH:Paleo:21464. Scale bars: 2.0 mm. Credits: photos by Adiël A. Klompmaker.	FIG. 20. — Alahexapus martini (Feldmann, Schweitzer & Portell, 2014) n. comb. from the lower Danian Pine Barren Member (Clayton Formation) found at the roadcut of Mussel Creek,Lowndes County,Alabama:A-C, dorsal, frontal,left lateral views of ALMNH:Paleo:5915;D-F, frontal, partial ventral,and dorsal views of UF 254041;G, ventral view of MMNS IP-7939 with female pleon;H, ventral view of ALMNH:Paleo:21464;I, closeup of maxilliped 3 of MMNS IP-7939;J, K, ventral views of UF 254040 with male pleon; L, view of partially preserved stridulating apparatus (vertical ridges arranged diagonally) of MMNS IP-7939; M, dorsal view of ALMNH:Paleo:21464. Scale bars: 2.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
F77987B8FF91FFB0135FC971AA81F9B5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/17244008/files/figure.png	https://doi.org/10.5281/zenodo.17244008	APPENDIX 1. — Figure with ventral and some dorsal characters used to describe brachyurans in this study: A, dorsal view of Costacopluma nicksabani n. sp. (ALMNH:Paleo:21454,paratype);B, C, ventral views including male pleon of C. nicksabani n. sp.(ALMNH:Paleo:21453,holotype);D, ventral view including female pleon of C. nicksabani n. sp. (MMNS IP-6480); E, posterior view of C. nicksabani n. sp. (ALMNH:Paleo:21457, paratype); F, ventral view including male pleon of C. grayi Feldmann & Portell, 2007 (MMNS IP-11213); G, ventral view including male pleon of C. texana (MMNS IP-7396.2); H, ventral view of female individual of C. texana (MMNS IP-7396.1);I, J, ventral and right lateral views of Raninoides danicus n. sp.(ALMNH:Paleo:21488,holotype);K, ventral view including female pleon of Alahexapus martini (Feldmann, Schweitzer & Portell, 2014) n. comb. (MMNS IP-7939); L, ventral view including male pleon of A. martini n. comb. (UF 254040). Abbreviations: bc, buccal collar; bs, branchiostegite; cx, coxa of maxilliped 3; e4, e5, episternites 4-5; ex, exopod of maxilliped 3; is, ischium of maxilliped 3; me, merus of maxilliped 3; o, oviduct; pl4-pl7, pleurites 4-7; ps1-ps6, pleonal somites 1-6; pt, pterygostome; s1-s7, sternites 1-7; spc, sternopleonal cavity; t, telson. Scale bars: A-J, 5.0 mm; K, L, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	APPENDIX 1. — Figure with ventral and some dorsal characters used to describe brachyurans in this study: A, dorsal view of Costacopluma nicksabani n. sp. (ALMNH:Paleo:21454,paratype);B, C, ventral views including male pleon of C. nicksabani n. sp.(ALMNH:Paleo:21453,holotype);D, ventral view including female pleon of C. nicksabani n. sp. (MMNS IP-6480); E, posterior view of C. nicksabani n. sp. (ALMNH:Paleo:21457, paratype); F, ventral view including male pleon of C. grayi Feldmann & Portell, 2007 (MMNS IP-11213); G, ventral view including male pleon of C. texana (MMNS IP-7396.2); H, ventral view of female individual of C. texana (MMNS IP-7396.1);I, J, ventral and right lateral views of Raninoides danicus n. sp.(ALMNH:Paleo:21488,holotype);K, ventral view including female pleon of Alahexapus martini (Feldmann, Schweitzer & Portell, 2014) n. comb. (MMNS IP-7939); L, ventral view including male pleon of A. martini n. comb. (UF 254040). Abbreviations: bc, buccal collar; bs, branchiostegite; cx, coxa of maxilliped 3; e4, e5, episternites 4-5; ex, exopod of maxilliped 3; is, ischium of maxilliped 3; me, merus of maxilliped 3; o, oviduct; pl4-pl7, pleurites 4-7; ps1-ps6, pleonal somites 1-6; pt, pterygostome; s1-s7, sternites 1-7; spc, sternopleonal cavity; t, telson. Scale bars: A-J, 5.0 mm; K, L, 2.0 mm. Credits: photos by Adiël A. Klompmaker.	2025-09-22	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.		Zenodo	biologists	Klompmaker, Adiël A.;Martin, P. George;Hyžný, Matúš;Bowman, Andrew R.;Phillips, George E.;Portell, Roger W.			
