Appendix 1
Specimens used in this study
Early Blancan NALMA specimens from the San Miguel de Allende Basin, Guanajuato, Mexico,
examined for this study include MPGJ 1946, locality GTO 47 Arroyo Belen from one female individual
consisting of 13 isolated osteoderms; two sets of articulated osteoderms, three each; one set of 11
osteoderms from the first two rows, left side of carapace; large set of approximately 60 articulated
osteoderms, left side of carapace; MPGJ 2042, locality GTO 82, Arroyo El Ingadazo, partial carapace of
adult in two sections, isolated osteoderms, teeth, incomplete fragments of pelvis, hyoid; MPGJ 2745 and
MPGJ 398, single osteoderms each from different individuals.
New specimens of Glyptotherium from the 111 Ranch beds (Gila Conglomerate, Late Blancan
NALMA) in this study include: MSM P4462, osteoderms, caudal vertebrae, caudal tube, skeletal
fragments, adult male; MSM (LCT 53-2001), osteoderm, adult; MSM (LCT 83-2000), osteoderms; MSM
P3618, osteoderms; MSM P3630, osteoderm; MSM P3655, osteoderms; MSM P3660, osteoderms, caudal
vertebrae fragments; MSM P3668, osteoderm; MSM P3835, osteoderms; MSM P3851, osteoderm,
cervical vertebra fragment; MSM P3858, osteoderm; MSM P3875, partial carapace in fragments from
two individuals, teeth, postcranial skeleton fragments; MSM P3894, two osteoderms; MSM P3959,
osteoderm; MSM P4008, two small osteoderms, baby; MSM P4008, six osteoderms, tooth fragments,
bone fragments, juvenile; MSM P4041, osteoderms, pelvis fragment, adult; MSM P4191, osteoderms;
MSM P4193, long bone fragment; MSM P4264, osteoderm; MSM P4398, osteoderms; MSM P4398,
osteoderms; MSM P4462, osteoderms, bone fragments, right mandible with teeth, tooth fragments; MSM
P4465, osteoderms, sacrum, both innominates, caudal vertebrae; MSM P4818, carapace and partial
skeleton, adult ?female; MSM P5999, osteoderm; MSM P6396, osteoderms, 3 bone fragments; MSM
P6418, osteoderms, adult; MSM P7417, osteoderms, possibly from caudal ring; MSM P7445, osteoderm;
MSM P7820, partial carapace and vertebrae, adult male; MSM P7911, carapace, tail, and associated
skeleton, tooth fragments, adult; MSM P4465, carapace on display, adult female; MSM P8538, partial
cranium, mature adult.
Late Blancan NALMA specimens from New Mexico examined for this study include
NMMNH&S P39434, Locality 4778 Mesilla B, osteoderms; NMMNH&S P42440, Locality 5549 (Camp
Rice Formation) ulna; NMMNH&S 58275, Locality 7688 (Palomas Formation), ca. 200 dermal ossicles;
NMMNH&S P57181, Locality 6160, osteoderm; NMMNH&S P57182, Locality 6172, osteoderm;
NMMNH&S unnumbered, Locality 2971 (Chambrino microsite) osteoderm of baby; NMMNH&S
P42434, Locality 5544, La Union, conical osteoderm, possibly from caudal ring; NMMNH&S P42409,
Locality 5523 (Camp Rice Formation), osteoderm; NMMNH&S P62434, Locality 8169 (Palomas
Formation), 3 isolated osteoderms, 8 osteoderms in articulation; NMMNH&S P55001, Locality 6630
(Virden Fauna, Pearson Mesa, Gila Group), distal right humerus; NMMNH&S P56794, Locality 7462
(Virden Fauna), osteoderm of baby or juvenile; NMMNH&S P37220, Locality 5096 (Camp Rice
Formation), partial rear carapace in articulation and isolated osteoderms, female adult; NMMNH&S
30441, Locality 4310 (Camp Rice Formation), partial carapace lacking marginal osteoderms;
NMMNH&S P26197, Locality 3470 (Camp Rice Formation), osteoderm. Also, a collection from Pearson
Mesa, Locality 4142: NMMNH&S P30120-P30127, P30172, P33185, P30123, all osteoderms; P30119,
skull fragment; P30132, distal tibia; P30172, unidentified bone fragment; P30129, thoracic vertebra
fragment; P30130, innominate fragment; P30131, distal humerus. Specimens in the NMMNH&S
collection that have not been assigned a NALMA age but were collected in the vicinity of others assigned
to Late Blancan-Irvingtonian NALMA include field number GSM 2012-104, 10/27/2012 (Gensler
microsite), osteoderms and one jaw fragment.
Irvingtonian NALMA specimen from the San Miguel de Allende Basin, Guanajuato, Mexico,
examined for this study includes: MPGH 2043, locality GTO 78 Arroyo Emilio-Gliptodon, partial
carapace in several sections and incomplete lower jaw of a baby.
Other specimens directly or indirectly discussed herein were included in Gillette and Ray (1981)
or represent collections of specimens from other faunas, as indicated in citations.
Small measurements were taken with Helios dial calipers, larger measurements with cloth or steel
ruler, sometimes with the aid of dividers. Photographs were taken with Nikon E8700 Digital Camera,
Nikon D5100 Digital Single Lens Reflex Camera, and Canon Power Shot SX 40 HS. Figures were
prepared and labeled in Adobe Photoshop, with slight modification to enhance detail and layout as
needed.