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- Geologic time scale (26014 bytes)
9: ...use geologic units occurring at the same time but from different parts of the world can often look dif...
19: ...tribes (and defined using stratigraphic sequences from Wales). The "Devonian" was named for the Briti...
28: {{mergefrom|List of time periods}}
63: ...of several "modern" mammal families. Primitive [[Cetacea|whales]] diversify. First grasses. Reglaciation...
126: ...phibious [[eurypterid]]s; [[rhizodont]]s dominant fresh-water predators. In the seas primitive [[Chon... - Dolphin (13554 bytes)
7: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
13: ...ated to [[whale]]s and [[porpoise]]s. The name is from [[Ancient Greek]] δελφ̥...
26: ...pecies of dolphin in 17 genera. They vary in size from 4 ft (1.2 m) and 88 lb (40 kg) ([[Maui's Dolphi...
28: ...ology)|family]] Delphinidae is the largest in the Cetacea, and relatively recent: dolphins evolved about 10...
49: **** [[Atlantic Spotted Dolphin]], ''Stenella frontalis'' - Mammal (11782 bytes)
33: **[[Cetacea]]
34: **[[Afrosoricida]]
43: ...offspring during pregnancy. Mammals range in size from the {{convert|30|–|40|mm|abbr=on}} [[bumblebe...
146: ...entifying this ancestry, but if, for example, a [[cetacean]] were found that had no hair at all, it would s...
154: ...ation. The thickness of this layer varies widely from species to species. - Boto (5572 bytes)
8: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
12: {{Taxobox_species_entry | taxon = '''''I. geoffrensis'''''}}
14: ..._simple | color = pink | binomial_name = Inia geoffrensis}}
15: {{Taxobox_image | image = [[Image:cetacea_range_map_Amazon_River_Dolphin.PNG|200px|Boto ran...
17: ...azon River Dolphin''' (''Inia geoffrensis'') is a freshwater or [[river dolphin]]. It is endemic to th... - Porpoise (4431 bytes)
7: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
15: ...le]]s and [[dolphin]]s. They are however distinct from dolphins, although the word "porpoise" is often...
22: These animals are the smallest [[cetaceans]], reaching body lengths up to 2.5 m (8 fe...
25: ...all's porpoise]] is said to be one of the fastest cetaceans with a speed of 55 km/h (34 m/h). Porpoise...
29: * '''Order [[Cetacea]]''' - Blue Whale (22203 bytes)
8: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
15: {{Taxobox_image | image = [[Image:cetacea_range_map_Blue_Whale.PNG|250px|Blue Whale range]]...
23: ...known when the members of these families diverged from each other.
32: ...e body. These pleats assist with evacuating water from the mouth after lunge feeding (see feeding belo...
34: ...blow (up to 12 m, typically 9 m) that can be seen from several kilometres on a calm day. Its [[lung]] ... - Bottlenose Dolphin (16802 bytes)
8: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
19: ...t the underside. This makes them hard to see both from above and below when swimming. The elongated up...
21: ... length from 2 to 4m (6 to 13 feet) and in weight from 150 to 650kg (330 to 1430 pounds) with males be...
23: ...land mammals (from which dolphins and all other [[cetacea]]ns evolved some 50 million years ago).
33: ...nded them for forty minutes, preventing an attack from the shark, as they returned to shore. (See [6]... - Ocean (6829 bytes)
4: '''Ocean''' (from [[Oceanus|Okeanos]], a Greek god of sea and wat...
6: ... [[archipelago]]s into the following five bodies, from the largest to the smallest: the [[Pacific Ocea...
12: ... last few million years movement of the [[Africa|African Continent]] has closed the straight off entir...
38: *[[cetacea]] such as [[whale|whales]], [[dolphin|dolphins]] ...
51: ...s may have once had internal oceans that have now frozen, such as [[Triton (moon)|Triton]]. The planet... - Whale (11080 bytes)
1: ...]], members of the [[Order (biology)|order]] '''[[Cetacea]]''', which also includes [[dolphins]] and [[porp...
3: ...nition is the one followed here. Whales are those cetaceans which are neither dolphins (i.e. members of the...
8: Cetaceans are divided into two suborders:
9: ...[keratin]], which they use to filter [[plankton]] from the water. They are the largest whales.
12: ...s, including all whales, is maintained at the ''[[Cetacea]]'' article. - Baleen whale (4213 bytes)
7: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
16: ... the upper jaw, which enables them to filter food from water.
22: ... [[cetacea]] article. Its scientific name derives from the Greek]word ''mystax'', which means "moustac...
33: ... Instead they are able to produce sounds in the infrasonic range of high volume. The calls of the larg... - Placentalia (2168 bytes)
10: [[Afrosoricida]]<br/>
28: [[Cetacea]]
32: ... mammals. The '''Placentalia''' are distinguished from other mammals in that the [[fetus|foetus]] is n...
34: ...liest known Placentalia species is ''[[Eomaia]]'' from the Lower [[Cretaceous]] of [[China]]. It is u... - Hippocampus (8957 bytes)
2: ...n [[memory]] and [[navigation]]. The name derives from its curved shape, which supposedly resembles th...
4: ...mptoms. Damage to the hippocampus can also result from oxygen starvation ([[anoxia]]) and [[encephalit...
6: ... is most pronounced in [[primate]]s and [[Cetacea|Cetacean]] sea mammals. Nonetheless, in [[primate]]s, the...
18: ...a [[virtual reality]] town. The findings resulted from research with individuals who had electrodes im...
33: ...tively [[Wiktionary:Hypotrophy|hypotrophic]] in [[cetaceans]]. - Chinese River Dolphin (4152 bytes)
8: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
15: {{Taxobox_image | image = [[Image:cetacea_range_map_Chinese_River_Dolphin.PNG|200px|Chinese...
17: ... River Dolphin''' (''Lipotes vexillifer'') is a [[freshwater dolphin]] found only in the [[Yangtze Riv...
21: ...e [[Chinese Academy of Sciences]] established the Freshwater Dolphin Research Centre as a branch of th...
31: ...as located at the Wuhan Institute of Hydrobiology from [[1980]] to [[July 14]], [[2002]]. Qiqi was dis... - Humpback Whale (17123 bytes)
9: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
16: {{Taxobox_image | image = [[Image:cetacea_range_map_Humpback_Whale.PNG|250px|Humpback Whale...
18: ...]] (leaping out of the water), its unusually long front fins, and its complex [[whale song]]. The Hump...
22: ...al fins, proportionally the longest fins of any [[cetacean]]. The two most enduring hypotheses are that the...
24: ...n each side of the mouth. [[Ventral]] grooves run from the lower jaw to the [[umbilicus]] about halfwa... - Pilot Whale (5993 bytes)
7: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
15: ... '''Pilot Whale''' is one of two [[species]] of [[cetacea]]n in the [[genus]] ''Globicephala''. The genus i...
21: ... by [[John Edward Gray]] in [[1846]]. He presumed from the skeleton that the whale had a large beak ("...
23: Birth weight is about 60 kg. Adult weight varies from 1,000 to 3,000 kg. They may be between four and...
25: ...0 to 30 in number. They are quite active and will frequently lobtail, spyhop and approach boats. - Atlantic White-Sided Dolphins (4439 bytes)
7: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
14: {{Taxobox_image | image = [[Image:cetacea_range_map_Atlantic_White-sided_Dolphin.PNG|250px|...
19: ... Gray in 1828. The specific name ''acutus'' comes from the [[Latin]] for pointed and refers to the [[d...
24: ...al fin, lying above a light grey stripe that runs from the beak, above the eye and down to the tail st...
28: From the analysis of the stomach contents of strande... - Baleen Whales (6057 bytes)
7: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
16: ... the upper jaw, which enables them to filter food from water.
22: ... [[cetacea]] article. Its scientific name derives from the [[Greek language | Greek]] word ''mystax'',...
44: ... Instead they are able to produce sounds in the infrasonic range of high volume. The calls of the larg...
51: * '''ORDER CETACEA''' - Beluga Whales (10188 bytes)
7: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
13: {{Taxobox_image | image = [[Image:cetacea_range_map_Beluga.PNG|250px|Beluga range]] | capti...
15: ... to simply as the '''Beluga''' - the word derives from the [[Russian language|Russian]] ''beloye'' mea...
20: ...is the now-extinct ''[[Denebola brachycephala]]'' from the late [[Miocene]] period. A single fossil ha...
27: ... a fin. The head is also unlike that of any other cetacean - its [[melon (whale)|melon]] is extremely bulbo... - Bottlenose Whales (4246 bytes)
6: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
10: {{Taxobox_species_entry | taxon = '''''H. planifrons'''''<br>'''''H. ampullatus'''''}}
13: {{Taxobox_image | image = [[Image:cetacea_range_map_Northern_Bottlenose_Whale.PNG|250px|Nor...
14: ... | color = pink | binomial_name = Hyperoodon planifrons | author = [[William Henry Flower|Flower]] | d...
15: {{Taxobox_image | image = [[Image:cetacea_range_map_Southern_Bottlenose_Whale.PNG|250px|Sou... - Bowhead Whales (5651 bytes)
8: {{Taxobox_ordo_entry | taxon = [[Cetacea]]}}
15: {{Taxobox_image | image = [[Image:cetacea_range_map_Bowhead_Whale.PNG|250px|Bowhead Whale r...
17: ...c Whale''', is a marine [[mammal]] of the order [[Cetacea]].
20: ...owhead Whales, which are used to strain tiny prey from the water, are the longest of any baleen whale,...
28: Breeding has been observed from March through August; conception is believed to...
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