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Fossil shrews from Honduras and their significance for late glacial evolution in body size (Mammalia: Soricidae: Cryptotis) / Neal Woodman --, Darin A. Croft --.
Brief | Detailed | MARC
Brief | Detailed | MARC
Brief | Detailed | MARC
Related Titles:
Series:
Fieldiana. Geology, new ser., no. 51
Series:
Publication (Field Museum of Natural History) ; 1534.
By:
Woodman, Neal.
Croft, Darin A.
Publication info:
Chicago, Ill. :Field Museum of Natural History,2005.
Call Number:
QE1 .F4 ser.2 no.51
Contributing Library:
University of Illinois Urbana Champaign
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LEADER
- Record Status:
c
- Type of record:
a
- Bibliographic level:
m
- Type of control:
- Undefined:
a
- Encoding level:
I
- Descriptive cataloging form:
a
- Linked record requirement:
CONTROL FIELD
- Control Field 001:
5127710
CONTROL FIELD
- Control Field 005:
20071024134050.0
CONTROL FIELD
- Control Field 008:
050817s2005 ilua b 000 0 eng d
SYSTEM CONTROL NUMBER
- System control number:
(OCoLC)ocm61281391
CATALOGING SOURCE
- Original cataloging agency:
AGL
- Transcribing agency:
AGL
- Modifying agency:
AGL
- Modifying agency:
CUY
- Modifying agency:
IUL
- Modifying agency:
UIU
LANGUAGE CODE
- Language code of text/sound track or separate title:
eng
- Language code of text/sound track or separate title:
spa
GEOGRAPHIC AREA CODE
- Geographic area code:
ncho---
NATIONAL AGRICULTURAL LIBRARY CALL NUMBER
- Classification number:
500
- Item number:
C432G no. 1534
LOCAL CALL NUMBER
- Local class number:
QE1
- Local Cutter number:
.F4 ser.2 no.51
LOCAL CALL NUMBER
- Local class number:
QE882.I5
- Local Cutter number:
W66 2005
UIUU MAIN ENTRY--PERSONAL NAME
- Personal name:
Woodman, Neal.
TITLE STATEMENT
- Title:
Fossil shrews from Honduras and their significance for late glacial evolution in body size (Mammalia: Soricidae: Cryptotis) /
- Remainder of title page transcription/statement of responsibility:
Neal Woodman --, Darin A. Croft --.
VARYING FORM OF TITLE
- Title proper/short title:
Fossil shrews from Honduras
PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
- Place of publication, distribution, etc.:
Chicago, Ill. :
- Name of publisher, distributor, etc.:
Field Museum of Natural History,
- Date of publication, distribution, etc.:
2005.
PHYSICAL DESCRIPTION
- Extent:
iv, 30 p. :
- Other physical details:
ill. ;
- Dimensions:
26 cm.
SERIES STATEMENT/ADDED ENTRY--TITLE
- Title:
Fieldiana.
- Name of part/section of a work:
Geology,
- Volume number/sequential designation:
new ser., no. 51
- International Standard Serial Number:
0096-2651 ;
SERIES STATEMENT
- Series statement:
Publication ;
- Volume number/sequential designation:
1534
GENERAL NOTE
- General note:
"Accepted April 6, 2005. Published July 20, 2005."
BIBLIOGRAPHY, ETC. NOTE
- Bibliography, etc. note:
Includes bibliographical references (p. 26-29).
SUMMARY, ETC.
- Summary, etc.:
Our study of mammalian remains excavated in the 1940s from McGrew Cave, north of Copán, Honduras, yielded an assemblage of 29 taxa that probably accumulated predominantly as the result of predation by owls. Among the taxa present are three species of small-eared shrews, genus Cryptotis. One species, Cryptotis merriami, is relatively rare among the fossil remains. The other two shrews, Cryptotis goodwini and Cryptotis orophila, are abundant and exhibit morphometrical variation distinguishing them from modern populations. Fossils of C. goodwini are distinctly and consistently smaller than modern members of the species. To quantify the size differences, we derived common measures of body size for fossil C. goodwini using regression models based on modern samples of shrews in the Cryptotis mexicana-group. Estimated mean length of head and body for the fossil sample is 72-79 mm, and estimated mean mass is 7.6-9.6 g. These numbers indicate that the fossil sample averaged 6-14% smaller in head and body length and 39-52% less in mass than the modern sample and that increases of 6-17% in head and body length and 65-108% in mass occurred to achieve the mean body size of the modern sample. Conservative estimates of fresh (wet) food intake based on mass indicate that such a size increase would require a 37-58% increase in daily food consumption. In contrast to C. goodwini, fossil C. orophila from the cave is not different in mean body size from modern samples. The fossil sample does, however, show slightly greater variation in size than is currently present throughout the modern geographical distribution of the taxon. Moreover, variation in some other dental and mandibular characters is more constrained, exhibiting a more direct relationship to overall size. Our study of these species indicates that North American shrews have not all been static in size through time, as suggested by some previous work with fossil soricids. -- Lack of stratigraphic control within the site and our failure to obtain reliable radiometic dates on remains restrict our opportunities to place the site in a firm temporal context. However, the morphometrical differences we document for fossil C. orophila and C. goodwini show them to be distinct from modern populations of these shrews. Some other species of fossil mammals from McGrew Cave exhibit distinct size changes of the magnitudes experienced by many northern North American and some Mexican mammals during the transition from late glacial to Holocene environmental conditions, and it is likely that at least some of the remains from the cave are late Pleistocene in age. One curious factor is that, whereas most mainland mammals that exhibit large-scale size shifts during the late glacial/postglacial transition experienced dwarfing, C. goodwini increased in size. the lack of clinal variation in modern C. goodwini supports the hypothesis that size evolution can result from local selection rather than from cline translocation. Models of size change in mammals indicate that increased size, such as that observed for C. goodwini, are a likely consequence of increased availability of resources and, thereby, a relaxation of selection during critical times of the year.
LANGUAGE NOTE
- Language note:
Abstract also in Spanish.
ISSUING BODY NOTE
- Issuing body note:
Fieldiana series has been published as Geological Series by Field Columbian Museum (1895-1909) and Field Museum of Natural History (1909-1943), and as Fieldiana: Geology by Chicago Natural History Museum (1945-1966) and Field Museum of Natural History (1966-1978). Fieldiana Geology New Series No. 1 began June 29, 1979.
SUBJECT ADDED ENTRY--TOPICAL TERM
- Topical term or geographic name as entry element:
Shrews, Fossil
- Geographic subdivision:
Honduras.
ADDED ENTRY--PERSONAL NAME
- Personal name:
Croft, Darin A.
SERIES ADDED ENTRY--UNIFORM TITLE
- Uniform title:
Publication (Field Museum of Natural History) ;
- Volume number/sequential designation:
1534.
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1 |aWoodman, Neal. |
| 245 |
10|aFossil shrews from Honduras and their significance for late glacial evolution in body size (Mammalia: Soricidae: Cryptotis) /|cNeal Woodman --, Darin A. Croft --. |
| 246 |
17|aFossil shrews from Honduras |
| 260 |
|aChicago, Ill. :|bField Museum of Natural History,|c2005. |
| 300 |
|aiv, 30 p. :|bill. ;|c26 cm. |
| 440 |
0|aFieldiana.|pGeology,|x0096-2651 ;|vnew ser., no. 51 |
| 490 |
1 |aPublication ;|v1534 |
| 500 |
|a"Accepted April 6, 2005. Published July 20, 2005." |
| 504 |
|aIncludes bibliographical references (p. 26-29). |
| 520 |
3 |aOur study of mammalian remains excavated in the 1940s from McGrew Cave, north of Copán, Honduras, yielded an assemblage of 29 taxa that probably accumulated predominantly as the result of predation by owls. Among the taxa present are three species of small-eared shrews, genus Cryptotis. One species, Cryptotis merriami, is relatively rare among the fossil remains. The other two shrews, Cryptotis goodwini and Cryptotis orophila, are abundant and exhibit morphometrical variation distinguishing them from modern populations. Fossils of C. goodwini are distinctly and consistently smaller than modern members of the species. To quantify the size differences, we derived common measures of body size for fossil C. goodwini using regression models based on modern samples of shrews in the Cryptotis mexicana-group. Estimated mean length of head and body for the fossil sample is 72-79 mm, and estimated mean mass is 7.6-9.6 g. These numbers indicate that the fossil sample averaged 6-14% smaller in head and body length and 39-52% less in mass than the modern sample and that increases of 6-17% in head and body length and 65-108% in mass occurred to achieve the mean body size of the modern sample. Conservative estimates of fresh (wet) food intake based on mass indicate that such a size increase would require a 37-58% increase in daily food consumption. In contrast to C. goodwini, fossil C. orophila from the cave is not different in mean body size from modern samples. The fossil sample does, however, show slightly greater variation in size than is currently present throughout the modern geographical distribution of the taxon. Moreover, variation in some other dental and mandibular characters is more constrained, exhibiting a more direct relationship to overall size. Our study of these species indicates that North American shrews have not all been static in size through time, as suggested by some previous work with fossil soricids. -- Lack of stratigraphic control within the site and our failure to obtain reliable radiometic dates on remains restrict our opportunities to place the site in a firm temporal context. However, the morphometrical differences we document for fossil C. orophila and C. goodwini show them to be distinct from modern populations of these shrews. Some other species of fossil mammals from McGrew Cave exhibit distinct size changes of the magnitudes experienced by many northern North American and some Mexican mammals during the transition from late glacial to Holocene environmental conditions, and it is likely that at least some of the remains from the cave are late Pleistocene in age. One curious factor is that, whereas most mainland mammals that exhibit large-scale size shifts during the late glacial/postglacial transition experienced dwarfing, C. goodwini increased in size. the lack of clinal variation in modern C. goodwini supports the hypothesis that size evolution can result from local selection rather than from cline translocation. Models of size change in mammals indicate that increased size, such as that observed for C. goodwini, are a likely consequence of increased availability of resources and, thereby, a relaxation of selection during critical times of the year. |
| 546 |
|aAbstract also in Spanish. |
| 550 |
|aFieldiana series has been published as Geological Series by Field Columbian Museum (1895-1909) and Field Museum of Natural History (1909-1943), and as Fieldiana: Geology by Chicago Natural History Museum (1945-1966) and Field Museum of Natural History (1966-1978). Fieldiana Geology New Series No. 1 began June 29, 1979. |
| 650 |
0|aShrews, Fossil|zHonduras. |
| 700 |
1 |aCroft, Darin A. |
| 830 |
0|aPublication (Field Museum of Natural History) ;|v1534. |
| 994 |
|aC0|bUIU |
|
|
View:
Fieldiana, Geology, new series, no. 51
scanned 12/14/2007
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