Overview

Brief Summary

Fossil species

recent & fossil

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Physical Description

Morphology

Other Physical Features: endothermic ; bilateral symmetry

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Source: Animal Diversity Web

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Diagnostic Description

Description

There is only 1 living species in the family Dugongidae. The other recent member, Steller's sea cow (Hydrodamalis gigas) has been extinct since 1768. The dugong is tropical and subtropical, but Steller's sea cow was an inhabitant of cold temperate to subarctic waters. In members of this family, the flattened tail is expanded into flukes, similar to those of cetaceans. Other caracteristics include a rostrum that is deflected downwards, the presence of erupted tusks in males (dugongs only; Steller's sea cow had no teeth), a more streamlined body than those of manatees, and the absence of nails on flippers. <123>
  • MASDEA (1997).
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Source: World Register of Marine Species

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Life History and Behavior

Behavior

Perception Channels: tactile ; chemical

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Source: Animal Diversity Web

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Reproduction

Key Reproductive Features: gonochoric/gonochoristic/dioecious (sexes separate); sexual

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
Specimen Records:3
Specimens with Sequences:3
Specimens with Barcodes:3
Species:1
Species With Barcodes:1
Public Records:2
Public Species:1
Public BINs:1
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Source: Barcode of Life Data Systems (BOLD)

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Barcode data

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Source: Barcode of Life Data Systems (BOLD)

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Wikipedia

Dugongidae

The Dugongidae are a family in the order of Sirenia.

The family has one surviving species, the dugong (Dugong dugon), one recently extinct species, Steller's sea cow (Hydrodamalis gigas), and a number of extinct genera known from fossil records.

Taxonomy[edit]

The genera Eosiren, Eotheroides, and Prototherium have been assigned to Halitheriinae in the past, but recent cladistic analysis recovers these genera as basal to the clade formed by Trichechidae and Dugongidae. Moreover, Halitheriinae is paraphyletic with respect to Dugonginae and Hydrodamalinae, and further use of the name should be discontinued because the type genus is based on a non-diagnostic tooth.[3]

References[edit]

  1. ^ Shoshani, J. (2005). Wilson, D. E.; Reeder, D. M, eds. Mammal Species of the World (3rd ed.). Johns Hopkins University Press. ISBN 978-0-8018-8221-0. OCLC 62265494. 
  2. ^ Vélez-Juarbe, J., and D. P. Domning, 2014. Fossil Sirenia of the West Atlantic and Caribbean region. X. Priscosiren atlantica, sp. nov. Journal of Vertebrate Paleontology 34(4):951-964. http://www.tandfonline.com/doi/full/10.1080/02724634.2013.815192#preview
  3. ^ M. Voss. 2014. On the invalidity of Halitherium schinzii Kaup, 1838 (Mammalia, Sirenia), with comments on systematic consequences. Zoosystematics and Evolution 90(1):87-93
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