Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
INSTRUCTION:
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Figure 1: The phylogenetic tree of the Mysticeti.
QUESTION:
1. Refer on the figure. What morphological traits does the new fossil, Janjucetus hunderi, share with the extant odontocetes?

Transcribed Image Text:(not to scale)
Pleist.
Pliocene
Miocene
Oligocene
Eocene
1.8
5.3
Late
11.6
Middle
15.9
Early
23.0-
Late
0
28.0-
Early
Late
34.0-
▬▬▬▬▬
38.0-
Middle
Early
48.6
55.85
Hippopotamus
!
Georgiacetus!
E
Zygorhiza
Odontoceti,
ChMTM®
99(9)
100(35)
macrophagy
(teeth only)
Sana
Janjucetus*
Mammalodon
bulk filter-
feeding
(teeth/baleen)
Chonecetus
Actiocetus
Eomysticetus
57(2)
76(4)
(1)
broad-based rostrum
bulk filter-feeding (baleen only)
Diorocetus
Caperea
92(5)
Pelocetus
100(13)
Eubalaena:
63(4)-
small body size
foreshortened rostrum
fibrocartilaginous mandibular symphysis
94(8)
large body size
edentulous rostrum
baleen
elongated and flattened rostrum
Eschrichtius D
Balaenoptera
54(3)
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