Play Video
1
Blastoid - Obliterate
Blastoid - Obliterate
::2013/03/18::
Play Video
2
pokemon kid
pokemon kid
::2008/11/24::
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3
Dubstep 2012 (DubToxic Mix) BLASTOID N MEGADROID
Dubstep 2012 (DubToxic Mix) BLASTOID N MEGADROID
::2011/03/13::
Play Video
4
Blastoid - Self-Sustained Existence
Blastoid - Self-Sustained Existence
::2013/03/18::
Play Video
5
BLASTOID @the moose
BLASTOID @the moose
::2014/05/11::
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6
Blastoid at The Basement
Blastoid at The Basement
::2014/04/09::
Play Video
7
BLASTOID BLASTOID.wmv
BLASTOID BLASTOID.wmv
::2011/11/10::
Play Video
8
Blastoid
Blastoid
::2011/03/28::
Play Video
9
Dubstep 2012 (Dubsgusting Mix) MEGADOID N BLASTOID
Dubstep 2012 (Dubsgusting Mix) MEGADOID N BLASTOID
::2011/03/05::
Play Video
10
Phantasy Star II - Infinite Blastoid Grinding
Phantasy Star II - Infinite Blastoid Grinding
::2014/02/23::
Play Video
11
Mistah Bohze bLASToid mcgONagle Album Sampler 2012
Mistah Bohze bLASToid mcgONagle Album Sampler 2012
::2012/01/19::
Play Video
12
Blastoid-All Riot
Blastoid-All Riot
::2012/03/06::
Play Video
13
Blastoid, Gov. Rick Perry and Hasidic Jews at the same party!
Blastoid, Gov. Rick Perry and Hasidic Jews at the same party!
::2011/09/26::
Play Video
14
4-14-12 Blastoid- Choking on air
4-14-12 Blastoid- Choking on air
::2012/04/16::
Play Video
15
Blastoids - Kids and Candy
Blastoids - Kids and Candy
::2010/05/10::
Play Video
16
Blastoid -self sustained existance live 3-29-12 @ billy o
Blastoid -self sustained existance live 3-29-12 @ billy o's
::2012/03/30::
Play Video
17
Blastoid-Self sustained existence
Blastoid-Self sustained existence
::2012/02/28::
Play Video
18
Dillon and Kat Thrashing to BLASTOID!
Dillon and Kat Thrashing to BLASTOID!
::2012/01/13::
Play Video
19
BLASTOID "I Hate My Job"
BLASTOID "I Hate My Job"
::2012/02/28::
Play Video
20
BLASTOID  Skate&thrash
BLASTOID Skate&thrash
::2011/11/10::
Play Video
21
Where the Hell is Captain Blastoid (Revised)
Where the Hell is Captain Blastoid (Revised)
::2009/02/02::
Play Video
22
blastoid 3D 1995
blastoid 3D 1995
::2010/04/09::
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23
Blastoid - Yayo Nigga Rachi
Blastoid - Yayo Nigga Rachi
::2012/05/21::
Play Video
24
Blastoids - Show me around @ Brooklyn Fireproof
Blastoids - Show me around @ Brooklyn Fireproof
::2011/08/10::
Play Video
25
Blastoid @ Billy O
Blastoid @ Billy O's 12-23-11 "Happier Than You'll Ever Be"
::2011/12/26::
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26
Blastoid at Billy O
Blastoid at Billy O's July 20, 2012
::2012/07/21::
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27
Saving Captain Blastoid
Saving Captain Blastoid
::2009/01/24::
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28
BLASTOID  happier than you
BLASTOID happier than you'll ever be
::2011/11/10::
Play Video
29
Invasion: Blastoids +150k score Part 1
Invasion: Blastoids +150k score Part 1
::2011/12/25::
Play Video
30
Blastoid Remix - Yayo Nigga Rachi ft Amaziin Boii F.P.
Blastoid Remix - Yayo Nigga Rachi ft Amaziin Boii F.P.
::2012/05/08::
Play Video
31
MEGA BLASTOID!11
MEGA BLASTOID!11
::2013/11/23::
Play Video
32
Blastoid
Blastoid
::2013/09/23::
Play Video
33
LaLaByzZz Pres. [PLL]Blastoid Lightshow @ Utopia After Party 2010
LaLaByzZz Pres. [PLL]Blastoid Lightshow @ Utopia After Party 2010
::2010/05/18::
Play Video
34
Blastoid and domo meet
Blastoid and domo meet
::2009/11/30::
Play Video
35
LaLaByzZz Pres. [PLL]Blastoid Lightshow @ 420Fest 2010
LaLaByzZz Pres. [PLL]Blastoid Lightshow @ 420Fest 2010
::2010/04/27::
Play Video
36
Jessy Matador - Bombastic ( Remixed By Blastoid DJ Cuchito Mix )
Jessy Matador - Bombastic ( Remixed By Blastoid DJ Cuchito Mix )
::2011/10/06::
Play Video
37
Blastoid-"Blastoid" live 3-29-12 @ billy
Blastoid-"Blastoid" live 3-29-12 @ billy'os
::2012/03/30::
Play Video
38
MEGADROID N BLASTOIDS Straight 2 Da Dom MIX!! (Beyond Sex)
MEGADROID N BLASTOIDS Straight 2 Da Dom MIX!! (Beyond Sex)
::2010/11/26::
Play Video
39
Blastoid-Blastoid
Blastoid-Blastoid
::2012/03/06::
Play Video
40
4-14-12 blastoid- blastoid
4-14-12 blastoid- blastoid
::2012/04/16::
Play Video
41
Costa Rican Surprise - Revenge of Blastoid - Part I
Costa Rican Surprise - Revenge of Blastoid - Part I
::2013/02/11::
Play Video
42
4-14-12 Blastoid- Booger sugar
4-14-12 Blastoid- Booger sugar
::2012/04/16::
Play Video
43
4-14-12 Blastoid- i hate my job
4-14-12 Blastoid- i hate my job
::2012/04/16::
Play Video
44
Blastoid -happier than youll ever be... live 3-29-12 @ billy
Blastoid -happier than youll ever be... live 3-29-12 @ billy 'os
::2012/03/30::
Play Video
45
4-14-12 Blastoid- self sustained existence
4-14-12 Blastoid- self sustained existence
::2012/04/16::
Play Video
46
4-14-12 Blastoid- skate and thrash
4-14-12 Blastoid- skate and thrash
::2012/04/16::
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47
Blastoid-choking on air ....live 3-29-12...@ billy o
Blastoid-choking on air ....live 3-29-12...@ billy o's
::2012/03/30::
Play Video
48
4-14-12 Blastoid- all riot
4-14-12 Blastoid- all riot
::2012/04/16::
Play Video
49
Blastoid-booger sugar live 3-29-12 ...live @ billy o
Blastoid-booger sugar live 3-29-12 ...live @ billy o's
::2012/03/30::
Play Video
50
Blastoid @ billy o
Blastoid @ billy o's 12-23-11 "i hate my job"
::2011/12/30::
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RESULTS [51 .. 101]
From Wikipedia, the free encyclopedia
  (Redirected from Blastoidea)
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Blastoids
Temporal range: Ordovician - Permian
Blastoids.jpg
Blastoid fossils (thecae) attached to matrix.
Scientific classification
Kingdom: Animalia
Phylum: Echinodermata
Subphylum: Blastozoa
Class: Blastoidea
Say, 1825
Orders

Fissiculata
Spiraculata
Incertae sedis:
Macurdablastus

"Blastoidea", from Ernst Haeckel's Art Forms of Nature, 1904

Blastoids (class Blastoidea) are an extinct type of stemmed echinoderm.[1] Often called sea buds, blastoid fossils look like small hickory nuts. They first appear, along with many other echinoderm classes, in the Ordovician period, and reached their greatest diversity in the Mississippian subperiod of the Carboniferous period. However, blastoids may have originated in the Cambrian. Blastoids persisted until their extinction at the end of Permian, about 250 million years ago. Although never as diverse as their contemporary relatives, the crinoids, blastoids are common fossils, especially in many Mississippian-age rocks.

Description[edit]

Like most echinoderms, blastoids were protected by a set of interlocking plates of calcium carbonate, which formed the main body, or theca. In life, the theca of a typical blastoid was attached to a stalk or column made up of stacked disc-shaped plates. The other end of the column was attached to the ocean floor by a holdfast, very much like stalked crinoids. The stalk was usually relatively short, and in some species, was absent, with the holdfast being attached directly to the base of the theca.

The mouth was located at the summit of the theca. Radiating like flower petals from the center were five food grooves, or ambulacra. Each ambulacrum had many long, thin, fine structures called brachioles, which were used to trap food particles and bring them to the mouth. Brachioles were delicate structures, and in fossils are not usually preserved in place. A series of five spiracle plates surrounded the star-shaped mouth, which included the anus, mouth and entrances to a set of five complex, folded respiratory organs known as hydrospires. These spiracles prevented mixing of the various fluids. Waste elimination was through the anispiracle, an opening formed by the fusing of anus and adjacent spiracles.

Like crinoids, blastoids were high-level, stalked suspension feeders (feeding mainly on planktonic organisms) that inhabited clear-to-silty, moderately agitated ocean waters from shelf to basin. The food gathering system of blastoids consisted of several types of ambulacra. Food entered the brachiolar ambulacra, was transferred to the side ambulacra through the brachiolar pit, then transferred to the main (median) ambulacra, and finally entered the mouth. Each of these ambulacra was roofed by cover plates. The cover plates of the brachiolar groove were movable and could open, allowing food to enter, or close as needed. Other cover plates may also have been movable.

Taxonomy[edit]

Blastoids are assumed to have evolved from the Cystoids.[2] Blastoids are subdivided into two orders: Fissiculata, which are characterized by direct entrance to the individual hydrospires by way of slits; and Spiraculata, which are characterized by indirect entrance to the hydrospires through canals by way of pores. The earliest blastoid yet found, Macurdablastus from the Middle Ordovician of Tennessee, cannot be classified as either order.

References[edit]

  1. ^ Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 1010. ISBN 0-03-056747-5. 
  2. ^ Palaeobiology and Biodiversity Research Group: Blastoids

External links[edit]

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