Dimorphism in Scelidotheriinae: Tables

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TABLE 1. Comparative measurements (in mm) of skulls. *Approximate.

Taxa	LMC	LDS	MWP	WS	HS	OMf5L	WB
S. leptocephalum (FMNH P 14274) S. leptocephalum (FMNH P 14267) S. leptocephalum (MLP 3-409) S. leptocephalum (MLP 3-408) S. leptocephalum (MLP 3-402) S. leptocephalum (MACN 13880) S. leptocephalum (MACN 13883) S. leptocephalum (MACN 9625) S. leptocephalum (MMP 1155) S. leptocephalum (MFCA 757)	520 400 415 400 470 550 515 --- 520 510	110 90 85 85 105 110 105 110 110 111	109 100 95 90 90 100 90 105 120 94	100 90 85 75 95 100 90 97 100 93	125 111 105 100 105 125 115 --- 145 105	295 225 230 200 250 290 275 270 260 254	117 111 100 82 100 110 100 100 115 98
S. bravardi (MMP 9-S) S. bravardi (MMP 31-S) S. bravardi (MMP 128-S) S. bravardi (MMP 458-S) S. bravardi (MMP 157-S)	410 500 405 385 560	90 109 100 88 113	75 95 85 80 96	75 95 85 81 80	113 135 116 110 117	230 295 242 213 278	105 112 120 77 116
V. bucklandi (MCL 4262) V. bucklandi (MCL 4293)	365 405	110 110	87 90	70 77	100 110	190 230	95 100
C. tarijensis (CTES-PZ 7151) C. tarijensis (MMP 1267) C. tarijensis (FMNH P 14243) C. tarijensis (FMNH P 14238) C. tarijensis (FMNH P13733) C. tarijensis (MD-97-23) C. tarijensis (MNPA 005750) C. tarijensis (MNPA 005766) C. tarijensis (PIMUZ A/V 0512)	540 540 500 550 490 465 482 *466 504	120 135 120 135 130 112 130 126 131	97 90 90 100 97 90 97 110 110	123 110 120 105 110 100 110 106 97	113 140 125 127 120 117 120 --- 136	300 283 285 285 290 285 290 *273 303	120 125 123 123 120 112 120 --- 116
C. chiliensis (MHIN-UNSL GEO V199) C. chiliensis (ROM 2089)	520 450	120 90	--- ---	*110 ---	110 ---	*300 250	110 105
C. cuvieri (MCL 4265) C. cuvieri (MCL 4259)	*370 350	100 100	80 85	*85 ---	--- ---	220 210	120 ---

TABLE 2. Acronyms and list of specimens of Scelidotherium, Valgipes, and Catonyx mentioned in the text.

Material	Taxa	Stratigraphic and geographic procedence
FMNH P 14274	S. leptocephalum	Pleistocene, Río Quequén, Buenos Aires, Argentina.
FMNH P 14267		Pleistocene, Buenos Aires, Argentina.
MACN 9625		"Upper Pampean", Laguna Vital, Chascomús, Buenos Aires, Argentina.
MACN 13880		"Pampean", Necochea, Buenos Aires, Argentina.
MACN 13883		"Pampean", Necochea, Buenos Aires, Argentina.
MLP 3-409		"Upper Pampean", Argentina.
MLP 3-402		"Pampean", Buenos Aires, Argentina.
MLP 3-408		"Upper Pampean", Buenos Aires, Argentina.
MMP 1155		Lobería Formation, Lujanian, Mar del Plata, Buenos Aires, Argentina.
MFCA 757		"Pampean" Formation, right bank of the Paraná River, Alvear, Santa Fe, Argentina.
BM(NH)M 37626 (Type)	S. bravardi	Ensenada Formation, "Toscas" del Río de La Plata, Buenos Aires, Argentina.
MMP 9-S		Ensenadan, NE of the city of Mar del Plata, in front of Santa Elena beach, General Pueyrredón, Buenos Aires, Argentina.
MMP 31-S		Ensenadan?, coastal cliffs in front of Parque Camet, Mar del Plata, Buenos Aires, Argentina.
MMP 128-S		Miramar Formation, base of the cliffs in front the dairy farm of the field of Cobo Mar del Plata, Buenos Aires, Argentina.
MMP 458-S		Ensenadan, coastal cliff, 800 m to the NNE of the pipe drain of the city of Mar del Plata, Buenos Aires, Argentina.
MMP 157-S		Ensenadan?, Estrada beach, Mar del Plata, Buenos Aires, Argentina.
MCL 4262	V. bucklandi	Late Pleistocene, Serra do Ramallo, North of Minas Gerais, Brazil.
MCL 4293		Pleistocene, Gruta Volta da Serra 3, São José das Missões, Minas Gerais, Brazil.
MCL 4264		Late Pleistocene, Iraquara, Brazil.
CTES-PZ 7151	C. tarijensis	Late Pleistocene, Lavalle, Corrientes, Argentina.
CTES-PZ 1690		Yupoí/Toropí Formation, Late Pleistocene, arroyo Toropí, Corrientes, Argentina.
FCS 96.I15/1/2		Pleistocene, Olavarría, Buenos Aires, Argentina.
FMNH P 14243		Pleistocene, Padcaya, Bolivia.
FMNH P 14238		Pleistocene, Tarija, Bolivia.
FMNH P 13733		Pleistocene, Tarija, Bolivia.
MNH TAR 1260 (Type)		Pleistocene, Tarija, Bolivia.
MNPA-V 005769		Pleistocene, Tarija, Bolivia.
MNPA-V 005750		Pleistocene, Tarija, Bolivia.
MNPA-V 005766		Pleistocene, Tarija, Bolivia.
MNPA-V s/n (MUT 166)		Pleistocene, Tarija, Bolivia.
MNPA-V s/n (MUT 446)		Pleistocene, Tarija, Bolivia.
MNPA-V s/n (MUT 007)		Pleistocene, Tarija, Bolivia.
NRM-N 4444		Pleistocene, Tarija, Bolivia.
MACN 1138		Pleistocene, Tarija, Bolivia.
MMP 3989		Ensenadan, Mar del Plata, Buenos Aires, Argentina.
MMP 1267		Bonaerian, north of Mar del Plata, Buenos Aires, Argentina.
MD-97-23		Bonaerian-Lujanian, Playa del Barco, Pehuen có, Buenos Aires, Argentina.
PIMUZ A/V 0512		Pleistocene, arroyo Maciel, Buenos Aires, Argentina.
BM(NH)M 2819	C. chiliensis	Late Pleistocene, Tamarugal, Tarapacá district, Chile.
SGO-PV 188		Late Pleistocene, close to the Desaguadero River, Ulloma, La Paz, Bolivia.
ROM 2089		Late Pleistocene, Guayas Department, Ecuador.
ROM 4572		Late Pleistocene, Guayas Department, Ecuador.
MHN-UNSL-GEO-V 199		Late Pleistocene, Uspara Formation, Pasos Malos, Merlo, San Luis, Argentina.
MCL 4265	C. cuvieri	Late Pleistocene, Iraquara, Brazil.
MCL 4259		Late Pleistocene, Gruta do Túnel, Santana, Brazil.
MCL 22682		Pleistocene, Brazil.
MCL 22683		Pleistocene, Brazil.
ZMUC 1668		Late Pleistocene, Lapa Grande de Genette, Minas Gerais, Brazil.

TABLE 3. Mean of the measurements of the skulls from the two morph types of dorsal crests of Scelidotherium leptocephalum and Catonyx tarijensis. (±) is standard deviation. (*) indicate significant differences in the medians with a Kruscal-Wallis Test (p<0.05).

Taxa	Variable	Measurements	p values
S. leptocephalum	LCM	x 477,37 (± 55,10)	0,581
	LDS	x 102,1 (± 10,94)	0,900
	MWP	x 99,3 (± 9,79)	0,981
	WS	x 92,5 (± 7,96)	0,957
	HS	x 115,24 (± 13,51)	0,676
	OMf5L	x 254,9 (± 29,91)	0,352
	WB	x 103,3 (± 10,30)	0,828
C. tarijensis	LCM	x 508,8 (± 31,02)	0,603
	LDS	x 126,56 (± 7,78)	0,263
	MWP	x 97,89 (± 7,80)	0,999
	WS	x 109,00 (± 8,44)	0,111
	HS	x 124,75 (± 9,32)	0,317
	OMf5L	x 290,13 (± 7,49)	0,984
	WB	x 119,8 (± 4,19)	0,968

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Dimorphism in Scelidotheriinae: Tables