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Volumn 301, Issue 5640, 2003, Pages 1708-1710

The anatomy of the world's largest extinct rodent

Author keywords

[No Author keywords available]

Indexed keywords

BONE; WETLANDS;

EID: 0141543675     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1089332     Document Type: Article
Times cited : (103)

References (26)
  • 4
    • 20744456728 scopus 로고    scopus 로고
    • Ministerio de Energía y Minas, Boletín de Geología, Caracas, ed. 3
    • Léxico Estratigráfico de Venezuela (Ministerio de Energía y Minas, Boletín de Geología, Caracas, ed. 3, 1997).
    • (1997) Léxico Estratigráfico de Venezuela
  • 16
    • 0141695581 scopus 로고    scopus 로고
    • note
    • Predictive equations for body size (15): log W = log a + b (log AP), where W is body mass (in kilograms), log a is intercept, b is slope, and AP is the anteroposterior diameter of the bone examined. Anteroposterior proximal femur diameter (APF): log W = -1.678 + 2.518 (1.80618), W = 741.1; anteroposterior distal humerus diameter (APH): log W = -1.467 + 2.484 (1.6532), W = 436.1 kg.
  • 18
    • 0141695580 scopus 로고    scopus 로고
    • note
    • The humerus/femur length ratio (H/F) and the (humerus + radius)/(femur + tibia) length ratio [(H + R)/(F + T)] in P. pattersoni (0.76 and 0.78, respectively) are average compared with those of other caviomorphs. For a sample of 17 extant caviomorphs, the mean values ± SD were H/F = 0.80 ± 0.08 and (H + R)/(F + T) = 0.74 ± 0.09. In the sample, there are no marked trends associated with growth or phylogeny (21). On the other hand, the ratios between femur versus humerus cross-sectional diameters (APF/APH) (15) show that the hindlimbs of P. pattersoni are robust. APF/APH is 1.42, whereas the average ± SD for a sample of 19 caviomorph species (21) is 1.27 ± 0.18. Robust hindlimbs in comparison to forelimbs characterizes also the clade composed of Dinomys, Chinchilla, and Lagostomus (mean ± SD 1.40 ± 0.26), the closest relatives to Phoberomys among extant caviomorphs.
  • 24
    • 0141583905 scopus 로고    scopus 로고
    • note
    • We added Lagostomus to the tree to increase the relevant sampling in our scaffold analysis. All relevant treatments of caviomorph taxonomy and phylogeny place Lagostomus together with Chinchilla (22).
  • 26
    • 0141472311 scopus 로고    scopus 로고
    • note
    • We thank J. Bocquentin, A. Ranci, A. Rincón, J. Reyes, D. Rodrigues de Aguilera, and R. Sánchez for help with fieldwork; J. Reyes and E. Weston for laboratory work; E. Weston and three anonymous reviewers for comments on the manuscript; O. Aguilera Jr. for assistance with digital imaging; S. Melendrez for reconstruction of the skeleton of Phoberomys in Fig. 2; D. Mörike (Stuttgart) and E. Weber (Tübingen) for access to collections; and J. Bocquentin and A. Ranci for preliminary work on the identification of the giant rodent. Work in Venezuela by M.R.S.-V. was partially supported by the National Geographic Society and the University of Tübingen. The Smithsonian Tropical Research Institute and the Universidad Nacional Experimental Francisco de Miranda (UNEFM) supported the field and laboratory work of O.A. O.A. is a Research Associate of the Smithsonian Tropical Research Institute.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.