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Unlike those of manatees, the dugong's teeth do not continually grow back via horizontal tooth replacement. [38] The dugong has two tusks which emerge in males during puberty, and sometime later in life for females after reaching the base of the premaxilla. [33] The number of growth layer groups in a tusk indicates the age of a dugong. [39]
Dugong dugon is the only extant species of the family Dugongidae, and one of only four extant species of the Sirenia order, the others forming the manatee family. [13] It was first classified by Müller in 1776 as Trichechus dugon, [14] a member of the manatee genus previously defined by Linnaeus. [15]
It is an early member of the family Dugongidae, which includes the extant dugong. Fossils have been found from Egypt , India , and Madagascar . Eotheroides was first described by Richard Owen in 1875 under the name Eotherium , which was replaced by the current name in 1899.
More specifically, M. albifontanum was discovered in the Porters Landing Member of the Parachucla Formation and the Chandler Bridge Formation of South Carolina (25.7-23.6 Ma). It is the stratigraphically oldest species of Metaxytherium and relatively small, with a body size of 2 to 3 meters. [1] M. arctodites
This page is a chronology of the Motown singing group the Temptations. It lists the members of the group during all phases of the group's history. While the Temptations have frequently changed their lineup, the group has always employed a person for each of the following roles: main lead singer (e.g., David Ruffin) secondary lead and baritone singer (e.g., Paul Williams) first tenor lead ...
During the 1969-1975 era prior to the band's breakup, Cummings and drummer Garry Peterson were the only consistent members; they were joined by five guitarists and two bassists during those years. Cummings ended the band in 1975 and embarked on a solo career. [ 3 ]
On March 25, 2015, Malik left One Direction and the remaining band members continued to tour and record an album without him. "After five incredible years Zayn Malik has decided to leave One ...
Members of Night Ranger performing live in 2008 (top) and 2009 (bottom). Night Ranger is an American hard rock band from San Francisco , California. Formed in 1979 under the name "Stereo", the group was originally a trio composed of former Rubicon members Jack Blades (bass, lead vocals), Kelly Keagy (drums, lead vocals) and Brad Gillis (guitar ...