| Annuliconchus Temporal range: | |
|---|---|
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| Annuliconchus siluricus (Eichwald, 1860) from Eke Formation, Ludlow, Lau, Gotland. | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | incertae sedis |
| Class: | |
| Order: | |
| Genus: | Annuliconchus † Vinn, 2006 |
Annuliconchus is a genus of microconchid tubeworms. Their tubes have pseudopunctae penetrating the tube wall. Tubes lumen is annulated. Annuliconchus occurs in the Silurian of Baltica. [1]
Thomas Jacob "Jack" Black is an American actor, comedian, and musician.
A polystrate fossil is a fossil of a single organism that extends through more than one geological stratum. The word polystrate is not a standard geological term. This term is typically found in creationist publications.
The lophophore is a characteristic feeding organ possessed by four major groups of animals: the Brachiopoda, Bryozoa, Hyolitha, and Phoronida, which collectively constitute the protostome group Lophophorata. All lophophores are found in aquatic organisms.
Tentaculites is an extinct genus of conical fossils of uncertain affinity, class Tentaculita, although it is not the only member of the class. It is known from Lower Ordovician to Upper Devonian deposits both as calcitic shells with a brachiopod-like microstructure and carbonaceous 'linings'. The "tentaculites" are also referred to as the styliolinids.
YouTube is an American online video sharing and social media platform headquartered in San Bruno, California, United States. Accessible worldwide, it was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by Google and is the second most visited website, after Google Search. YouTube has more than 2.5 billion monthly users, who collectively watch more than one billion hours of videos each day. As of May 2019, videos were being uploaded at a rate of more than 500 hours of content per minute.
A viral video is a video that becomes popular through a viral process of Internet sharing, typically through video sharing websites such as YouTube as well as social media and email. For a video to be shareable or spreadable, it must focus on the social logics and cultural practices that have enabled and popularized these new platforms.
Spirorbis is a genus of very small polychaete worms, usually with a white coiled shell. Members of the genus live in the lower littoral and sublittoral zones of rocky shores. Spirorbis worms usually live attached to seaweeds, but some species live directly on rocks, shells or other hard substrates. Spirorbis was once thought to have a fossil record extending back into the Early Paleozoic, but now all pre-Cretaceous spirorbins are known to be microconchids. The earliest members of genus appeared in the Miocene, but Oligocene finds may also be possible. The genus contains the following species:
Jawed Karim is an American software engineer and Internet entrepreneur of Bangladeshi and German descent. He is a co-founder of YouTube and the first person to upload a video to the site. The site's inaugural video, "Me at the zoo", uploaded on April 23, 2005, has been viewed over 276 million times as of June 28, 2023. During Karim's time working at PayPal, where he met fellow YouTube co-founders Steven Chen and Chad Hurley, he designed many of its core components, including its real-time anti-fraud system.
Chad Meredith Hurley is an American webmaster and businessman who serves as the advisor and former chief executive officer (CEO) of YouTube. He also co-founded MixBit. In June 2006, he was voted 28th on Business 2.0's "50 People Who Matter Now" list. In October 2006, he and Steve Chen sold YouTube for $1.65 billion to Google. Hurley worked in eBay's PayPal division—one of his tasks involved designing the original PayPal logo—before co-founding YouTube with fellow PayPal colleagues Steve Chen and Jawed Karim. Hurley was primarily responsible for the tagging and video-sharing aspects of YouTube.
YouTube is an American online video-sharing platform headquartered in San Bruno, California, founded by three former PayPal employees—Chad Hurley, Steve Chen, and Jawed Karim– in February 2005. Google bought the site in November 2006 for US$1.65 billion, since which it operates as one of Google's subsidiaries.
Cornulitida is an extinct order of encrusting animals from class Tentaculita, which were common around the globe in the Ordovician to Devonian oceans, and survived until the Carboniferous.
The order Microconchida is a group of small, spirally-coiled, encrusting fossil "worm" tubes from the class Tentaculita found from the Upper Ordovician to the Middle Jurassic (Bathonian) around the world. They have lamellar calcitic shells, usually with pseudopunctae or punctae and a bulb-like origin. Many were long misidentified as the polychaete annelid Spirorbis until studies of shell microstructure and formation showed significant differences. All pre-Cretaceous "Spirorbis" fossils are now known to be microconchids. Their classification at the phylum level is still debated. Most likely they are some form of lophophorate, a group which includes phoronids, bryozoans and brachiopods. Microconchids may be closely related to the other encrusting tentaculitoid tubeworms, such as Anticalyptraea, trypanoporids and cornulitids.
Anticalyptraea is a fossil genus of encrusting tentaculitoid tubeworms from the Silurian to Devonian of Europe and North America . Anticalyptraea commonly encrust various invertebrate fossils such as stromatoporoids, rugose corals, bryozoans, brachiopods and crinoids, but they can also be common on the hardgrounds.
Punctaconchus is a genus of microconchid tubeworms. It was the last genus of microconchids, and the only genus to exist beyond the Triassic. Their tubes have large pores (punctae) penetrating the tube wall. Tubes lumen is covered by ripplemark−like transverse ridges. Punctaconchus occurs in the Middle Jurassic of England, France and Poland.
Palaeoconchus is a genus of microconchid tubeworms. Their tubes have pseudopunctae penetrating the tube wall. Tubes lumen is smooth. Palaeoconchus occurs in the Late Ordovician of Baltica and Avalonia. In the Devonian it had a global distribution.
Helicoconchus is a microconchid genus that occurs in the Lower Permian of Texas. It forms small reef-like bodies of tubes branching from a common origin. The impunctate tubes are greatly elongated for microconchids and have occasional diaphragms with central pits. The tubes branch in two ways: budding from the tube wall and binary fission. They lived in shallow, normal marine environments.
The Bluestone Formation is a geologic formation in West Virginia. It is the youngest unit of the Upper Mississippian-age Mauch Chunk Group. A pronounced unconformity separates the upper boundary of the Bluestone Formation from sandstones of the overlying Pennsylvanian-age Pocahontas Formation.
A YouTuber is a type of social media influencer who posts videos on the video-sharing platform YouTube, typically posting to their personal YouTube channel. The term was first used in the English language in 2006.