Submitted : May 2 0th , 2020 – Accepted : July 30 th , 2020 – Posted online : August 3 rd , 2020

To link and cite this article:

doi: 10.5710/AMGH.30.07.2020.3368

1 Paleontological Notes

2 ‘A VERY LAZY ’: REVISION OF THE COTYPE OF NOTHROPUS

3 CARCARANENSIS (MAMMALIA, )

4 RAÚL IGNACIO VEZZOSI 1,2,3, ALLINE ROTTI4,5 and LEONARDO DOS SANTOS

5 AVILLA4,5

6

7 1Laboratorio de Paleontología de Vertebrados, Centro de Investigación Científica y de

8 Transferencia Tecnológica a la Producción (CONICET, Gob. E.R., UADER), España

9 149, Diamante E3105BWA, . E-mail: [email protected]

10 2 Facultad de Ciencia y Tecnología, Universidad Autónoma de Entre Ríos, Ruta

11 Provincial 11 km 10,5, Oro Verde E3100XAD, Entre Ríos, Argentina.

12 3Programa de Desarrollo de las Ciencias Básicas (PEDECIBA – UDELAR) and Museo

13 Nacional de Historia Natural de Montevideo, .

14 4Laboratório de Mastozoologia, Instituto de Biociências, Universidade Federal do

15 Estado do Rio de Janeiro. Avenida Pasteur, 458, sala 501, Urca. 22290-240, Rio de

16 Janeiro, RJ, Brasil. E-mails: [email protected], [email protected]

17 5Programa de Pós-graduação em Biodiversidade e Biologia Evolutiva (PPGBBE),

18 Universidade Federal do Rio de Janeiro, Centro de Ciências da Saúde, Prédio das Pós-

19 graduações do Instituto de Biologia, Interbloco B/C, Cidade Universitária. 21941-902,

20 Rio de Janeiro, RJ, Brasil.

21

22

23 Total number of pages (14), figures (3)

24 Proposed header. VEZZOSI ET AL.: REVISION OF NOTHROPUS CARCARANENSIS

25 BORDAS, 1942.

1 26 Corresponding author: [email protected]

27 Short Description. The cotype of the Nothropus carcaranensis is reviewed and

28 systematically assigned to the extinct Cervidae Morenelaphus.

29

30 Key words. Anatomy. Systematic. Cervidae. Morenelaphus. Braincase

31 Palabras clave. Anatomía. Sistemática. Cervidae. Morenelaphus. Caja craneana.

2 32 THE HOLOTYPE of the nothrotheriid Nothropus carcaranensis Bordas, 1942 is a partial

33 dentary from the of Santa Fe Province (Argentina) associated to other

34 isolated bones (see Bordas, 1942; Brandoni & McDonald, 2015). Among these remains,

35 an isolated braincase had been considered the cotype of N. carcaranensis in the original

36 publication of Bordas (1942:174–175).

37 This contribution provide for the first time detailed anatomical description and

38 analysis of this braincase assigned to N. carcaranensis, and to discuss its original

39 assignment.

40 Anatomical abbreviations. Acr, articular crest; af, articular fossa; ali,

41 alisphenoid; atu, articular tuberosity; bs, basisphenoid; bo, basioccipital; bu, bumps;

42 eam, external acoustic meatus; eop, external occipital process; fm, foramen magnum;

43 fo, foramen ovale; for, foramen orbitorotundum; fr, frontal; hf, hypoglossal foramen;

44 jf, jugular foramen; lf, lacerum foramen; mp, mastoid process; ms, mesiodistal sulcus;

45 mt, meatus temporalis; oc, occipital condyle; orb, orbital; p, pedicle; pal, palatine; pm,

46 procesus muscularis; par, parietal; ppa, paroccipital process; pop, postglenoid process;

47 pos, parieto-occipital suture; ptub, posterior tuberosity; pte, pterygoid; sc, sagittal

48 crest; sf, stylohyoid fossa; so, supraoccipital; sq, squamosal; tc, temporal crest; th,

49 tympanohyal recess; tm, tuberculum musculare; tyb, tympanic bulla; zp, zygomatic

50 process of squamosal.

51 MATERIALS AND METHODS

52 A direct comparison of the cotype of Nothropus carcaranensis with the skulls of

53 nothrotheres (e.g., Mionothorpus cartellei De Iuliis, Gaudin, Vicars [2011],

54 maquinense [Lund, 1839], Pronothrotherium mirabilis [Kraglievich,

55 1925], spp. McDonald & Muizon, 2012) and extant and extinct deer (see

56 Appendix 1) was made. The cranial nomenclatural of and deer follows

3 57 Cabrera (1941), NAV (2005), and Heckeberg (2020). Comparisons to some taxa, such

58 as Megaloceros giganteus Blumenbach, 1799, Navahocerus fricki (Schultz & Howard,

59 1935) were based on Webb (1992) and Vislobokoba (2013). A list of the analyzed

60 specimens and their institutional collections are present in Appendix 1 (Supplementary

61 Online Information).

62 GEOGRAPHIC AND STRATIGRAPHIC PROVENANCE OF THE FOSSIL

63 DEER

64 The cotype of Nothropus carcaranensis (MACN-Pv 12630, Fig. 1) was

65 recovered by Osvaldo Coronel between 1930 to 1940 from the Carcarañá beds at the

66 National Road number 11, near Villa La Rivera, Santa Fe Province, Argentina

67 (32°38'23.03''S; 60°48'54.16''W). The fossiliferous strata can be correlated to the Upper

68 Pleistocene sequence (Cohen et al., 2013; ICC, 2018), which is part of the Timbúes

69 Formation (Iriondo & Kröhling, 2009; Vezzosi et al., 2019a, 2019b).

70 [Figure 1 insert here]

71

72 SYSTEMATIC PALEONTOLOGY

73

74 Order CETARTIODACTYLA Montgelard, Catzeflis & Douzery, 1997

75 Suborder RUMINANTIA Scopoli, 1777

76 Infraorder PECORA Linnaeus, 1758

77 Family CERVIDAE Goldfuss, 1820:374

78 Genus Morenelaphus Carette, 1922

79 Type species. Morenelaphus brachyceros (Gervais & Ameghino, 1880)

80 Morenelaphus sp.

81 Figures 1–3

4 82

83 Referred material. MACN-Pv 12630 posterior portion of the braincase of a young-adult

84 deer (Fig. 1), originally considered as cotype of Nothropus carcaranensis by Bordas

85 (1942:174–175).

86 Locality and age. Late Pleistocene levels of La Rivera town (Carcarañá River between

87 Timbúes and Oliveros, 32°38'23.03"S – 60°48'54.16"W), Santa Fe Province, Argentina.

88

89 Description and comparisons. MACN-Pv 12630 does not resemble another species of

90 Nothrotheriidae, and its general morphology is clearly different of any sloth braincases

91 (Fig. 1–3). In fact, it lacks features clearly recognized in best-known nothrotheriid

92 species like Mionothorpus cartellei, Nothrotherium maquinense, Pronothrotherium

93 mirabilis, even in Thalassocnus spp., including: circular and flat ectotympanic bone

94 (Fig. 2.3–2.4); flat basioccipital-basiesphenoid bones without posterior tuberosities (Fig.

95 2.5–2.6); absence of tympanic bullae and deep tympanohyal recess (Fig. 2.3–2.6); large

96 sagittal crest (Fig. 2.8); and large occipital condyles, very conspicuous and with oval

97 section; (Fig. 2.9); amongst others (Fig. 2). Moreover, the braincase of MACN-Pv

98 12630 is very similar to a young-adult deer in several aspects (Fig. 1), which include a

99 weak sagittal crest and basioccipital-basisphenoid bones fused (Fig. 3.3). The nuchal

100 plane of the occipital is composed by fully fused bones, but keeping a parieto-occipital

101 suture (Fig. 3.4). This suture is positioned dorsally near the parietal bone and disto-

102 laterally from the dorso-posterior area of squamosal. The mastoid process extends

103 ventro-laterally to the posterior edge of squamosal. Posteriorly, some specimens of

104 Morenelaphus (e.g., MFA-G-Pv 1311) lack a lateral constriction near the mastoid

105 process and the nuchal area of the occipital has a subcircular shape (Fig. 3.5). The

106 mastoid in Morenelaphus is a vertical and wide plate, which is compressed between the

5 107 posterior surface of the squamosal and the anterolateral edge of the infraoccipital; the

108 entire occipital area is subcircular in a posterior view (Fig. 3.6). Such as in Blastocerus

109 dichotomus males (Fig. 3.1), the posterior edge of the braincase, in lateral view, is

110 extremely concave and both the supraoccipital region and the occipital condyles are

111 projected much more posteriorly than other extant Cervidae (Fig. 3.3–3.4).

112 Nevertheless, senile individuals of Odocoileus virginianus have a very prominent edge

113 along the lambdoid suture (Cabrera, 1941), but never at the level recognized for B.

114 dichotomus and MACN-Pv 12630 (Fig. 3). Although both paroccipital processes are

115 slightly fragmented, they are ventrally evident such as in Hippocamelus spp. Leuckart,

116 1816; B. dichotomus; Ozotocerus bezoarticus (Linnaeus, 1758); Mazama spp.

117 Rafinesque, 1817; Cervus elaphus Linnaeus, 1758 and Rangifer tarandus Linnaeus,

118 1758 (Fig. 3). The occipital condyles are comparatively large and well-developed as in

119 Navahocerus fricki (Webb, 1992), much more than in all extant South American

120 Cervidae (SAC). MACN–Pv 12630 and Morenelaphus have similar large size and

121 reniform occipital condyles (Fig. 2.10–3). Adult individuals of Morenelaphus that bear

122 large antlers (MFA-G-Pv 1312, MFA-G-Pv 1722; Fig. 3.5) have one or two

123 conspicuous bumps dorsally to the foramen magnum. MACN–Pv 12630 lacks this

124 feature (Fig. 3.6), probably because it is a young-adult. Both petrosals in MACN–Pv

125 12630 bear a similar morphology to Morenelaphus (see Orcesi et al., 2019), in which

126 the promontorium is short and ovoid, the epitympanic wings are short and have a flat

127 surface and the tegmen tympani is concave, with an oval transverse section and with less

128 conspicuous anterior process (see Vezzosi, 2015, fig. II.102). In contrast with the

129 Nothrotheriidae, the basioccipital-basisphenoid have a triangular section in ventral

130 view, with two posterior tuberosities, which are distally project to both sides of

131 paroccipital processes (Fig. 3.8). These tuberosities exhibit a similar development in B.

6 132 dichotomus (MACN-Ma 13-1), O. bezoarticus (MACN-Ma 49183), and O. virginianus

133 (AMNH 100289); while in Hippocamelus spp., Mazama spp., and Pudu puda Molina,

134 1782, these are proportionally less developed. As in Morenelaphus, the mesiodistal

135 sulcus continues in a convex crest, limited by two conspicuous tuberculum musculare

136 with variable size (Fig. 3.7–3.8). Although MACN–Pv 12630 has the basisphenoid

137 preserved only until the level of its convex crest, it stills very similar to the one in

138 Morenelaphus (Fig. 3.7); showing a basicranium with small jugular foramen and

139 associated to the lacerum foramen, circular foramen orbitorotundum and similar in size

140 to the foramen ovale (Fig. 3.8). The concave articular fossa and the postglenoid process

141 are transversely positioned, but this latter is crosswise to foramen ovale. Behind this

142 foramen, the tympanic bulla is less inflated compared to Mazama spp., O. virginianus,

143 P. puda, and R. tarandus, and almost flattened such as in B. dichotomus, C. elaphus, O.

144 bezoarticus, P. mephistophiles (de Winton, 1896) and Hippocamelus spp. The

145 depression to tympanohyal recess is very deep in Morenelaphus (MNHNM 689), a

146 well-defined cavity, while in MACN-Pv 12630, which have only preserved the

147 tympanohyal, this is circular and lesser deep (Fig. 3.8).

148 [Figure 2 insert here]

149 DISCUSSION

150 Antlers are the most SAC common fossil, but skulls are extremely rare.

151 Therefore, the of extinct SAC is traditionally based on antler morphology,

152 and not on braincases or postcranial remains (Cabrera, 1929; Kraglievich, 1932;

153 Churcher, 1966; Alcaraz, 2010; Rotti et al., 2018). However, anatomical characters

154 present in the braincase are very useful in mammals to evaluate some taxonomic issues.

155 Several fossils collected by Osvaldo Coronel during 1930 and 1940 come from

156 Carcarañá river at the Northern Pampa region and are housed at MACN and were

7 157 identified as Nothrotherinae indet., Nothropus carcaranensis, and sp.

158 (Brandoni & McDonald, 2015; Brandoni & Vezzosi, 2019). Among these remains,

159 Bordas (1942) recognizes the basicranium study here as part of the syntype (MACN-Pv

160 12630, cotype) of N. carcaranensis, and is pointed out substantial differences with

161 Nothrotherium maquinense (e.g., sharp external occipital process, slightly evident

162 paroccipital processes, acoustic meatus near the paroccipital process and posterior to the

163 postglenoid process). These morphological differences are present in deer (Cabrera,

164 1941; Vezzosi, 2015), while others (e.g., large intercondylar area, tympanohyal in a

165 large and concave surface, conspicuous entotympanic and superficial petrosal bones)

166 are clearly recognized in Nothrotheriinae and Thalassocninae (De Iuliis et al.,

167 2011; McDonald & Muizon, 2012).

168 Furthermore, the morphological comparisons between MACN-Pv 12630 and

169 extant and extinct American allowed to recognize that the braincase previous

170 attributed to a Nothrotheriidae shares several characters with Morenelaphus (e.g., large

171 and posteriorly projected reniform condyles and tuberculae musculari).

172 Additionally, Morenelaphus have several other features especially in the

173 basicranium that are distinct from all other deer (i.e., conspicuous bumps, small jugular

174 foramen and associated to the lacerum foramen, circular orbitorotundum foramen with

175 similar size to foramen ovale). Also, considering the petrosal bones described by Orcesi

176 et al. (2019), it is possible to observe a short and ovoid promontorium; short and flat

177 epitympanic wing; tegmen tympani concave transversely convex, with a less

178 conspicuous anterior process. Thus, this unique combination of features in the braincase

179 confirms without any doubt the assignment of MACN-Pv 12630 to a young-adult

180 Morenelaphus Cervidae and not a sloth.

181 [Figure 3 insert here]

8 182 ACKNOWLEDGMENTS

183 We thank to the curators of CFA, CML, MACN, MDPA, MFA, MLP, MMP,

184 MNHN, MUFYCA; for facilitating access to collections of their institutions. Special

185 thanks to Guillermo Cassini (MACN) for facilitating the use of photos and information

186 of living deer from the collection of the AMNH, and to Andrés Rinderknecht (MNHN)

187 and Diego Brandoni (CICYTTP) for improving a previous version and providing useful

188 comments. We thank the reviewers François Pujos (IANIGLA) and H. Gregory

189 McDonald (BLM, USA) for providing useful reviews. This work was funded by PICT-

190 ANPCyT 2017-0954 (Argentina) and PEDECIBA-UDELAR (Uruguay).

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295 Figure captions

296 Figure 1. Braincase of MACN-Pv 12630 assigned to Morenelaphus in; 1, Left lateral;

297 2, Posterior; 3, Ventral; 4, Dorsal views. Scale 5 cm.

298 Figure 2. 1, Skull anatomy of cervids sensu Heckeberg (2020); 2, MACN-Pv 12360 in

299 lateral view; 3, Draw of the holotype of Mionothropus cartellei (modified from

300 De Iuliis et al., 2011); 4, Left lateral view of the braincase of Pronothrotherium

301 mirabilis (FC-DPV 271); 5, Draw of the basicranium of Mionothorpus cartellei

13 302 in ventral view (modified from De Iuliis et al., 2011); 6, Brasicranium of P.

303 mirabilis (FC-DPV 271) in ventral view; 7, Basicranium of MACN-Pv 12360 in

304 ventral view; 8-9, Dorsal and posterior views of P. mirabilis (FC-DPV 271); 10-

305 11, Posterior and dorsal views of MACN-Pv 12360. For anatomical

306 abbreviations, see material and methods. Scale 1 cm.

307 Figure 3. Braincases of living and fossil SAC. 1, Male of Blastocerus dichotomus

308 (MLP 22-II-99-1) in left lateral view; 2, Female of B. dichotomus (MLP 9-XI-

309 01-1) in left lateral view; 3, Male of Morenelaphus in left lateral view; 4,

310 Young-adult specimen of Morenelaphus (MACN-Pv 12630) in left lateral view;

311 5, Morenelaphus (MFA-G-Pv 1312) in posterior view; 6, Morenelaphus

312 (MACN-Pv 12630) in posterior view; 7, Morenelaphus (MFA-G-Pv 1312) in

313 ventral view; 8, Morenelaphus (MACN-Pv 12630) in ventral view. For

314 anatomical abbreviations, see material and methods. Scale 5 cm.

14

Paleontological Notes

‘A VERY LAZY DEER’: REVISION OF THE COTYPE OF NOTHROPUS

CARCARANENSIS (MAMMALIA, XENARTHRA)

RAÚL IGNACIO VEZZOSI 1,2,3, ALLINE ROTTI4,5 and LEONARDO DOS SANTOS

AVILLA4,5

1Laboratorio de Paleontología de Vertebrados, Centro de Investigación Científica y de Transferencia

Tecnológica a la Producción (CONICET, Gob. E.R., UADER), España 149, Diamante E3105BWA,

Argentina. E-mail: [email protected]

2 Facultad de Ciencia y Tecnología, Universidad Autónoma de Entre Ríos, Ruta Provincial 11 km 10,5,

Oro Verde E3100XAD, Entre Ríos, Argentina.

3Programa de Desarrollo de las Ciencias Básicas (PEDECIBA – UDELAR) and Museo Nacional de

Historia Natural de Montevideo, Uruguay.

4Laboratório de Mastozoologia, Instituto de Biociências, Universidade Federal do Estado do Rio de

Janeiro. Avenida Pasteur, 458, sala 501, Urca. 22290-240, Rio de Janeiro, RJ, Brasil. E-mails: [email protected], [email protected]

5Programa de Pós-graduação em Biodiversidade e Biologia Evolutiva (PPGBBE), Universidade Federal do Rio de Janeiro, Centro de Ciências da Saúde, Prédio das Pós-graduações do Instituto de Biologia,

Interbloco B/C, Cidade Universitária. 21941-902, Rio de Janeiro, RJ, Brasil.

SUPPLEMENTARY ONLINE INFORMATION

Institutional abbreviations. AMNH, American Museum of Natural History, New

York, EEUU; CFA-Ma, Colección de Mastozoología, Fundación de Historia Natural

‘Félix de Azara’, Buenos Aires, Argentina; CML, Colección Mamíferos Lillo,

Universidad Nacional de Tucumán-Fundación Miguel Lillo, Tucumán, Argentina;

LACM, Natural History Museum of Los Angeles County, Los Angeles, EEUU; MACN-A, Colección Nacional Ameghino, Museo Argentino de Ciencias Naturales

“Bernardino Rivadavia”, Buenos Aires, Argentina; MACN-Ma, Sección

Mastozoología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”,

Buenos Aires, Argentina; MACN-Pv, Sección Paleontología de Vertebrados, Museo

Argentino de Ciencias Naturales “Bernardino Rivadavia”, Buenos Aires, Argentina;

MDPA, Museo Municipal Darwin de Punta Alta, Bahía Blanca, Argentina; MFA-G-

Pv, Área Paleontología de Vertebrados, Museo Provincial de Ciencias Naturales

“Florentino Ameghino”, Santa Fe, Argentina; MFA-Zv, Área Zoología de Vertebrados,

Museo Provincial de Ciencias Naturales “Florentino Ameghino”, Santa Fe, Argentina;

MLP, Museo de La Plata, Buenos Aires, Argentina; MMP, Museo Municipal de Mar del Plata “Lorenzo Scaglia”, Buenos Aires, Argentina; MNHNM, Museo Nacional de

Historia Natural de Montevideo, Uruguay; MNHN SAS, Muséum National d'Historie

Naturelle, Paris, France; MUFYCA, Museo Universitario Florentino y Carlos

Ameghino, Rosario, Santa Fe, Argentina.

Appendix 1. Taxonomic list of specimen of Morenelaphus and living deer used.

Morenelaphus, MACN-Pv 11408, MACN-Pv 11479, MACN-Pv 11564, MACN-Pv

11722, MACN-Pv 11730, MACN-Pv 12082, MACN-Pv 15697, MACN-Pv 16578,

MACN-Pv 16580; MLP 9-10, MLP 51-IV-11-69, MLP 63-V-31-1; MPA-85-189-I-D,

MFA-G-Pv 1311, MFA-G-Pv 1312, MFA-G-Pv 1681, MFA-G-Pv 1722, MFA-G-Pv

1723, MFA-G-Pv 1724, MFA-G-Pv 1725, MFA-G-Pv 1726; MUFYCA 1027,

MUFYCA 1432, MNHN 689. Hippocamelus sulcatus, MLP 9-11 (type of Furcifer seleniticus), MLP 9-23 (plastotipo de Furcifer sulcatus). Morenelaphus brachyceros,

MLP 9-15 (type of Morenelaphus lydekkeri); MLP 9-21 (type of Morenelaphus rothi);

MLPM 249 (calcotype of Cervus brachyceros), MLPM–250 (calcotype of Cervus palaeoplatensis), MLP 91-1. Morenelaphus lujanensis, MLP 9-10 (type of M. pseudoplatensis); MLP 9-17 (type of Blastocerus azpeitianus); MLP 9-26 (type of

Pampaeocervus platensis), MLP 63-V-31-1. Blastocerus dichotomus, CFA–Ma 6805,

CML 3738, MACN–ZV 13.1, MACN–Zv 13.2, MACN–Ma 45-8, MACN–Ma 5172,

MACN–Ma 13437, MACN–Ma 16269, MACN–Ma 21645, MACN–Ma 21646

MACN–Ma 21647, MACN–Ma 26601, MACN–Ma 31231, MACN–Ma 42.320, MFA–

Zv 1264, MFA–Zv 179, MFA–Zv 180, MFA–Zv 181, MFA–Zv 1263, MLP 763, MLP

1523, MLP 1524, MLP 1687, MLP 1724, MLP 9-XI-01-2, MLP 9-XI-01-3, MLP 9-XI-

01-4, MLP 11.X.46.8, MLP 11.X.46.14, MLP 11.X.46.15, MLP 11.X.46.17, MLP

12.XI.01.1, MLP 12.XI.01.3, MLP 12-XI-01-7, MLP 12-XI-01-9, MLP 12-XI-01-13,

MLP 12-XI-10-14, MLP 22.II.99.I. Axis axis, MACN–Ma 44.2, MACN–Ma 47216.

Cervus elaphus, MACN–Ma 4338, MACN–Ma s/n. Dama dama, MACN–Ma 4397,

MACN–Ma 25959. Hippocamelus antisensis, AMNH 217149, CML 3737, CML 3740,

CM; 3742, CML 3745, CML 3777, CML 3779, MCN-UNSa 003583, MACN–Ma

5362, MCN-UNSa 01, MCN-UNSa 03, MCNUNSa 01/m, MCN-UNSa 02/m, MCN-

UNSa 03/m, MCN-UNSa 04, MCN-UNSa 05, MACN–Ma 53.60, MACN–Ma 53.62,

SGO.Ma 567, SGO.Ma 1023. Hippocamelus bisulcus, CML 3276, CML 3739, CML

3743, CML 3744, CML 3776, MACN–Ma 2.16, MACN–Ma 4.30, MACN–Ma 11.8,

MACN–Ma 44.28, MACN–Ma 15665 MACN–Ma 38261, MLP 397, MLP 423, MLP

516, MLP 1346, MLP 1350, MLP 1352, MLP 1353, MLP 1354, MLP 1359, MLP 1360,

MLP 1361, MLP 1362, MLP 1363, MLP 1364, MLP 1522, MLP 10-VIII-00-30, MLP

19-X-00-11, SGO.Ma 1024. Mazama americana, CFA-Ma 03911, CFA-Ma 03983.

Mazama gouazoupira, CFA-Ma 04369, CFA-Ma 06345, CFA-Ma 10793, CFA-Ma

11044, MACN–Ma 3632, MFA–Zv 40, MFA–Zv 106, MFA–Zv 125, MFA–Zv 126,

MFA–Zv 127, MFA–Zv 128, MFA–Zv 156, MFA–Zv 157, MFA–Zv 194, MFA–Zv 937, MFA–Zv 753, MFA–Zv 760, MFA–Zv 782, MFA–Zv 783, MFA–Zv 784, MFA–

Zv 785, MLP 713, MLP 1-IX-00-4, MLP18-X-02-5. Mazama nana, CFA-Ma 05719,

CFA-Ma 0263, MACN–Ma 24688, MACN–Ma 24691. Mazama sp., MLP 735, MLP

736, MLP 1343, MLP 1344, MLP 1525. Moschus moschiferus, MACN–Ma 35211.

Odocoileus virginianus, AMNH 100289. Ozotoceros bezoarticus, MACN–Ma 4.14,

MACN–Ma 18.14, MACN–Ma 24507, MACN–Ma 24523, MACN–Ma 24749,

MACN–Ma 4297, MACN–Ma 31231, MACN–Ma 49182, MACN–Ma 49183, MACN–

Ma 49240, MFA–Zv 147, MFA–Zv 438, MFA–Zv 870, MFA–Zv 880, MFA–Zv 881,

MFA–Zv 882, MFA–Zv 883, MFA–Zv 915, MFA–Zv 1000, MFA–Zv 1182, MFA–Zv

1183, MFA–Zv 1184, MFA–Zv 1185, MFA–Zv 1186, MFA–Zv 1187, MFA–Zv 1188,

MFA–Zv 1189, MFA–Zv 1190, MFA–Zv 1191, MFA–Zv 1192, MFA–Zv 1195, MFA–

Zv 1196, MFA–Zv 1197, MFA–ZV 1198, MLP 692, MLP 1337, MLP 1340, MLP

1341, MLP 1-XII-00-2, MLP 5-VI-97-3, MLP 6-VIII-98-1, MLP 14-VI-00-2, MLP 18-

VIII-92-1, MLP 18-VIII-92-2, MLP 18.VIII.92.7, MLP 18.VIII.92.9, MLP

18.VIII.92.15, MLP 4-14. Pudu mephistophiles, AMNH 181505, AMNH 181506,

AMNH 181504. Pudu pudu, MACN–Ma 17809, MACN–Ma 22368, MACN–Ma

47219, SGO.Ma 480, SGO.MA 559, AMNH 93321. Rangifer tarandus, MACN–Ma

6.3, MACN–Ma 8.24, MACN–Ma 4331. Taxonomic list of nothrotheres used.

Mionothropus cartellei, LACM 4609 ⁄ 117533; Nothrotheriops shastensis, LACM 208,

166, 632,633; Nothrotherium, MUN STRI 12924; Pronothrotherium mirabilis, FC-

DPV 271; Thalassocnus natans, MNHN SAS 734; T. littoralis, MNHN SAS 1615.