PDF (Lo-Res) - Smithsonian Institution Libraries

More documents

Recommendations

Info

172 SMITHSONIAN CONTRIBUTIONS TO PALEOBIOLOGY FIGURE 2.—Map showing location of locality SBCM 05.006.399 for the new partial humerus referred to Aiolornis incredibilis. Dashed line indicates unsurveyed boundary of Temecula Land Grant. transverse section through nutrient foramen on margo ventralis at midshaft a flattened oval not quite twice as wide as deep (more egg-shaped, with margo ventralis slightly narrower than margo dorsalis in Argentavis; nearly round in Teratornis) (Figure 3); (4) corpus humeri less curved proximally in both horizontal and vertical planes; and (5) attachment of M. pectoralis with distal portion a broad, flattened area (area damaged but appears similar in Argentavis; narrow, steeply sloping on distal end of crista deltopectoralis in Teratornis). These characters hold in comparison with all humeri of Teratornis from Rancho La Brea, California (n=>50). Although the position of the M. latissimus dorsi is so markedly different from that seen in known teratorns, even to the oooO A B C D FIGURE 3.—Comparison of the size and shape of the cross section of the humeral shaft in the plane of the nutrient foramen in a vulturid (A) and teratorns (B-D): A, California Condor, Gymnogyps californianus; B, Merriam's Teratorn, Teratornis merriami; C, Aiolornis incredibilis; D, Argentavis magnificens. Scale bar=2 cm. point of leading one to question whether or not the humerus might even be from a new, unknown family, in the absence of additional characters the presence of the four teratorn autapomorphies listed above are sufficient grounds for placing the specimen with the teratorns. Measurements of this specimen are limited to shaft width and depth in the plane of the midshaft nutrient foramen on the facies ventralis: 37.8 mm and 22.0±1 mm, respectively. Comparable measurements for the single specimen of Argentavis are 52.2 mm and 32.8 mm, respectively, and measurements for Teratornis merriami {n=\6) are 23.2-28.9 mm (x=24.9 mm) and 18.3-23.0 mm (JC = 19.9 mm), respectively. Right radius: Distal end, Anza-Borrego Desert State Park Paleontological Collection, ABDSP(LACM) 1318/V3803, from Irvingtonian (middle Pleistocene, or 1.5-1.0 Ma (Savage and Curtis, 1970:223)) deposits at the 3600-ft level of the Vallecito Creek area, Anza-Borrego Desert State Park, referred to Teratornis incredibilis by Howard (1963). Emended description, in comparison with T merriami, as follows: distal contour straighter, less rounded at corners; ligamental prominence extending more proximad, significantly elevated above and more markedly set off from shaft and more elevated than central ligamental attachment in anterior view (elevational differences slightly magnified by loss of surface bone on central ligamental attachment; both areas of attachment at about same level in Teratornis) (bone slightly crushed along proximal edge of prominence, but this cannot account for sharp drop to shaft); shaft immediately above distal end flat in anterior view; internal edge of shaft proximal to internal end of scapholunar facet broad, channeled, or slightly convex transversely, which gives way to knife-like ridge proximad, with interno-anterior edge formed by long, prominent attachment of Lig. radioulnare interosseum +Lig. ulno-radiocarpale (edge very narrow in Teratornis, sloping steeply mediad with attachment of Lig. radioulnare interosseum+Lig. ulno-radiocarpale a broad, flat area halfway between edge and midline of bone that is slightly elevated proximally); depression occurs between attachment of Lig. radioulnare interosseum + Lig. ulnoradiocarpale and midline of bone (accentuated, but not caused by crushing) (absent in Teratornis); central ligamental prominence more elevated and extending closer to distal end before dropping off than in Teratornis; external edge of shaft proximal to ligamental prominence with linear convexity; and shaft significantly more curved in anterior view and slightly more curved in external view (some of the curvature, but not much, may be a result of distortion in preservation). Premaxillary: Anza-Borrego Desert State Park Paleontological Collection, ABDSP(LACM) 6747/V26697, from Blancan (late Pliocene, or 3.5-3.2 Ma (Savage and Curtis, 1970:223; Evernden et al., 1964:164)) deposits at the 7000-8000-ft level of the Fish Creek beds in the Anza-Borrego Desert State Park, referred to Teratornis incredibilis by Howard (1972). Emended description as follows: markedly compressed, deep beak; palatal surface fairly flat (more concave than in Terator-
NUMBER 89 173 nis but not highly vaulted as in vulturids), with prominent central ridge, or septum (which is only slightly developed anteriorly in Teratornis), but lacking distinct median groove posterior to ridge (as present in Teratornis); crista tomialis wider in transverse section and more deeply grooved and more symmetrical anteriorly than in Teratornis but forming comparable enclosure of deep, narrow channel in anteriormost portion of beak, in region of sharp curvature. In teratorns, the crista tomialis forms a sharp ridge external to the region of the anterior narial border, but farther anterior, about halfway to tip of beak, this ridge declines in prominence, and the median portion of the grooved crista tomialis forms a sharper ridge. The point of this transition represents the posteriormost portion of this specimen of beak that is preserved, which suggests that the specimen came from a bird with a proportionately much deeper beak than seen in Teratornis. Left ulna: Proximal end and partial proximal shaft (Figure 4), Anza-Borrego Desert State Park Paleontological Collection, ABDSP (IVCM) 519/5660, from Vallecito member of the Palm Spring Formation (Woodward, 1963), June Wash area of the Vallecito-Fish Creek Basin. Specimen from Vallecito Creek local fauna (Jefferson, 1995), dating to about 1.8-0.9 Ma. This ulna is severely crushed, but enough of the original structure remains to determine that it differs from that of Teratornis by having (1) olecranon long and very broad; (2) cotyla ventralis lying at a much steeper angle to the long axis of the shaft; and (3) cotyla dorsalis wider and relatively shallow. Although the specimen is quite crushed, most of the bone of the proximal end is present so it is possible to approximate closely its original shape. The cotyla ventralis may be slightly rotated as a result of crushing, but the original shape, in ventral view, is clearly preserved. The amount of bone present suggests that the proximal end was less deep anterioposteriorly immediately distal to the cotyla ventralis, and the tuberculum Lig. collat. ventralis was much less bulbous, than in Teratornis. In addition, it appears that the olecranon was much more compressed anteroposteriorly, although some post-mortem crushing has taken place. A total of about 26 cm of the ulna is preserved, in four pieces, although only two of the four pieces actually fit together. Two of the shaft fragments have feather papillae, but the smallest does not. The small diameter of the smallest fragment, which has no recognizable features, suggests that it may not even be part of the ulna, an idea supported by the presence of a fifth fragment that is unidentifiable to element, but which is definitely not part of an ulna. Right carpometacarpus: Fragmentary distal end, Universidad Nacional Autonoma de Mexico, Instituto de Geologia, Museo de Paleontologia, IGCU-6133, from locality GTO.31, Blancan, Rancho Viejo area, State of Gaunajuato, Mexico, about 240 km NNW of Mexico, Distrito Federal. This specimen is too fragmentary to provide much information, but it is clearly a teratorn. It differs from carpometacarpi of Teratornis by having (1) the facies articularis digitalis major with the medial rise more elongated and elevated and more distinctly set off from the anterior portion; and (2) the os metacarpale minoris with the distal area of fusion with the os metacarpale majus proportionately shorter than in Teratornis and the distal end more massive, projecting distad more distinctly and at a greater angle from the os metacarpale majus. The single known partial carpometacarpus of Argentavis is too poorly preserved for comparison. For further details on the fauna associ- FIGURE 4.—A,B, proximal end of the ulna referred to Aiolornis incredibilis (ABDSP(IVCM) 519/5660): A, anterior view; B, ventral view. C,D, ulna of Teratornis merriami (George C. Page Museum, B124): c, anterior view; D, ventral view. Note the differences between the olecranons and the orientation of the cotylae ventralis. Scale bar=3 cm. B
Page 1 and 2:
»'' § "S^ iFjwtM . •- .m-i Avia
Page 3:
SMITHSONIAN CONTRIBUTIONS TO PALEOB
Page 6 and 7:
ABSTRACT Olson, Storrs L., editor.
Page 8 and 9:
EARLY WATERFOWL (ANSERIFORMES) AND
Page 10 and 11:
v m SMITHSONIAN CONTRIBUTIONS TO PA
Page 12 and 13:
localities, all of them situated in
Page 14 and 15:
Bone of Sus scrofa Linnaeus, introd
Page 16 and 17:
duboisi are larger than the largest
Page 18 and 19:
8 iver (1897) but afterward were tr
Page 20 and 21:
10 SMITHSONIAN CONTRIBUTIONS TO PAL
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
16 Cor. Hum. Uln. Cpm. Fern. Tbt. T
Page 28 and 29:
Page 30 and 31:
20 sometatarsus are proportionally
Page 32 and 33:
22 Cor. Hum. Uln. Cpm. Fern. Tbt. T
Page 34 and 35:
Page 36 and 37:
26 Cor. Hum. Cpm. Fern. Tbt. Tmt. P
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
34 ability in such a way that it ca
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
42 2km SMITHSONIAN CONTRIBUTIONS TO
Page 54 and 55:
Site 13 Research Base ENTRANCE Lowe
Page 56 and 57:
Page 58 and 59:
48 the last has unusually slender w
Page 60 and 61:
50 Si 5 15i 10- 5- 20 J 15 I 10 f 5
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Page 77 and 78:
Comparison of Paleoecological Patte
Page 79 and 80:
NUMBER 89 69 TABLE 1.—Vertebrate
Page 81 and 82:
NUMBER 89 71 Mallorca, probably in
Page 83:
NUMBER 89 Alcover, J.A. 1989. Les a
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 95 and 96:
The History of the Chatham Islands'
Page 97 and 98:
NUMBER 89 87 Species Common Name Pe
Page 99 and 100:
NUMBER 89 89 NZA 797,1930,1934 Unco
Page 101 and 102:
NUMBER 89 91 anoramphus spp.), Chat
Page 103 and 104:
NUMBER 89 93 TABLE 2.—Land snails
Page 105 and 106:
NUMBER 89 95 counterparts, with som
Page 107 and 108:
NUMBER 89 population, if such exist
Page 109 and 110:
NUMBER 89 99 FIGURE 11.—Skulls of
Page 111 and 112:
NUMBER 89 101 FIGURE 13.—Lower ma
Page 113 and 114:
NUMBER 89 the Chatham Island Pied O
Page 115 and 116:
NUMBER 89 Locality 9, Western Maung
Page 117 and 118:
NUMBER 89 107 yellowish sand (site
Page 119:
NUMBER 89 109 ogy. Notornis, supple
Page 122 and 123:
112 SMITHSONIAN CONTRIBUTIONS TO PA
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133: 122 SMITHSONIAN CONTRIBUTIONS TO PA
Page 135 and 136: The Middle Pleistocene Avifauna of
Page 137: NUMBER 89 Accordi, B. 1962. La grot
Page 140 and 141: 130 FIGURE 1.—Map showing locatio
Page 142 and 143: 132 Cranium Mandibula Scapula Clavi
Page 149 and 150: Seabirds and Late Pleistocene Marin
Page 151 and 152: NUMBER 89 141 METHODS Only strictly
Page 153 and 154: NUMBER 89 143 FIGURE 2.—Area of s
Page 161 and 162: NUMBER 89 151 FIGURE 10.—Area of
Page 163 and 164: NUMBER 89 153 FIGURE 12.—Area of
Page 165 and 166: NUMBER 89 155 the period studied. T
Page 167: NUMBER 89 157 Walker, C.A., G.M. Wr
Page 174 and 175: 164 Vl 620 M 570 £ 520 S 470f •
Page 176 and 177: 166 birds, such as the two species
Page 180 and 181: 170 cional Autonoma de Mexico, for
Page 184 and 185: 174 ated with this specimen, see Mi
Page 187 and 188: The Fossil Record of Condors (Cicon
Page 189 and 190: NUMBER 89 179 FIGURE 2.—Geographi
Page 191 and 192: NUMBER 89 181 FIGURE 5.—Vulturida
Page 193 and 194: NUMBER 89 183 FIGURE 7.—Referred
Page 195 and 196: Two New Fossil Eagles from the Late
Page 197 and 198: NUMBER 89 187 TABLE 1.—Measuremen
Page 199 and 200: NUMBER 89 189 carpal trochlea relat
Page 201 and 202: NUMBER 89 191 FIGURE 4.—Holotypic
Page 203 and 204: NUMBER 89 193 We compared the parat
Page 205 and 206: NUMBER 89 195 FIGURE 6.—Distribut
Page 207 and 208: NUMBER 89 197 the Florida State Mus
Page 209 and 210: A New Genus of Dwarf Megapode (Gall
Page 211 and 212: NUMBER 89 201 lis hypotarsi along t
Page 213 and 214: NUMBER 89 203 The fossil is larger
Page 215 and 216: NUMBER 89 205 Clark, George A., Jr.
Page 217 and 218: A New Genus and Species of the Fami
Page 219 and 220: NUMBER 89 209 son with other known
Page 221 and 222: NUMBER 89 211 FIGURE 1.—Argornis
Page 223 and 224: NUMBER 89 213 AM AL AM AL AM AL AM
Page 225 and 226: NUMBER 89 215 caput humeri perpendi
Page 227 and 228: Selmes absurdipes, New Genus, New S
Page 229 and 230: NUMBER 89 219 FIGURE 2.—Selmes ab
Page 231 and 232: NUMBER 89 221 Costae: Deformed frag
Page 233 and 234:
A Fossil Screamer (Anseriformes: An
Page 235 and 236:
NUMBER 89 FIGURE 3.—Chaunoides an
Page 237 and 238:
NUMBER 89 227 B C D FIGURE 6.—The
Page 239 and 240:
NUMBER 89 229 FIGURE 9.—Right tib
Page 241 and 242:
The Anseriform Relationships of Ana
Page 243 and 244:
NUMBER 89 233 Subfamily ANATALAVINA
Page 245 and 246:
NUMBER 89 235 mal was found under t
Page 247 and 248:
NUMBER 89 237 tion, with retroartic
Page 249 and 250:
NUMBER 89 FIGURE 7.—Sternum and p
Page 251 and 252:
NUMBER 89 241 der. The bone is very
Page 253:
NUMBER 89 243 Eocene records of the
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 263 and 264:
Presbyornis isoni and Other Late Pa
Page 265 and 266:
NUMBER 89 255 FIGURE 1.—Referred
Page 267 and 268:
NUMBER 89 257 vical vertebrae of th
Page 269:
NUMBER 89 259 (Olson and Parris, 19
Page 272 and 273:
Page 274 and 275:
Page 276 and 277:
Page 278 and 279:
Page 280 and 281:
Page 282 and 283:
Page 284 and 285:
274 America. Science, 214(4526): 12
Page 286 and 287:
276 concerning the amphicoelous str
Page 288 and 289:
278 ment of the radius that are con
Page 290 and 291:
280 The left coracoid is represente
Page 292 and 293:
Page 294 and 295:
284 Kurochkin, E.N. 1982. [New Orde
Page 296 and 297:
Page 298 and 299:
288 Palaeontological Institute. [Sp
Page 300 and 301:
290 1991). In this paper we use a "
Page 302 and 303:
Page 305 and 306:
Implantation and Replacement of Bir
Page 307 and 308:
NUMBER 89 297 saurs (Figure 1E-G).
Page 309 and 310:
NUMBER 89 299 would seem unlikely a
Page 311 and 312:
Humeral Rotation and Wrist Supinati
Page 313 and 314:
NUMBER 89 303 apparent. It is now c
Page 315 and 316:
NUMBER 89 305 FIGURE 3.—Dorsal vi
Page 317 and 318:
NUMBER 89 307 FIGURE 4.—Wing of t
Page 319:
NUMBER 89 309 Jura-Museums, Eichsta
Page 322 and 323:
Page 324 and 325:
Page 326 and 327:
Page 328 and 329:
Page 330 and 331:
Page 332 and 333:
Page 335:
Early Evolution of Birds: Roundtabl
Page 338 and 339:
Page 340 and 341:
Page 342 and 343:
Page 344 and 345:
Page 346 and 347:
Page 348 and 349:
338 evolved independently twice." M
Page 350 and 351:
Page 352 and 353:
Page 354 and 355:
Page 356:
1 i'~L ,i "^ 1 •vw* HBB!/'' . m
show all

PDF (Lo-Res) - Smithsonian Institution Libraries

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?