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Bullhead Shark
The bullhead sharks are members of the genus ''Heterodontus'', the only members of the family Heterodontidae and only living members of the order Heterodontiformes. All are relatively small, with the largest species reaching just in maximum length. They are bottom feeders in tropical and subtropical waters. The Heterodontiforms appear in the fossil record in the Early Jurassic. The oldest fossils of the modern genus date to the Late Jurassic. Despite the very ancient origins of this genus and its abundance in the fossil record, phylogenetic evidence indicates that all extant species in the genus arose from a single common ancestor that survived the Cretaceous-Paleogene extinction, with diversification into modern species only starting around the mid-Eocene. Description Bullhead sharks have tapered bodies, with most species reaching around in length. Their bodies vary in colour, including shades of grey, brown, and red and pale colours, and are covered in a variety of patterns ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horn Shark
The horn shark (''Heterodontus francisci'') is a species of bullhead shark, in the family Heterodontidae. It is endemic to the coastal waters off the western coast of North America, from California to the Gulf of California. Young sharks are segregated spatially from the adults, with the former preferring deeper sandy flats and the latter preferring shallower rocky reefs or algal beds. A small species typically measuring in length, the horn shark can be recognized by a short, blunt head with ridges over its eyes, two high dorsal fins with large spines, and a brown or gray coloration with many small dark spots. Slow-moving, generally solitary predators, horn sharks hunt at night inside small home ranges and retreat to a favored shelter during the day. Their daily activity cycles are controlled by environmental light levels. Adult sharks prey mainly on hard-shelled molluscs, echinoderms, and crustaceans, which they crush between powerful jaws and molar-like teeth, while also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Bullhead Shark
The Japanese bullhead shark (''Heterodontus japonicus'') is a species of bullhead shark in the family Heterodontidae found in the northwestern Pacific Ocean off the coasts of Japan, Korea, and China. This benthic shark occurs at depths of over rocky bottoms or kelp beds. Measuring up to long, it can be identified by its short, blunt head, two high dorsal fins with anterior spines, and pattern of irregularly shaped, vertical brown bands and stripes. The Japanese bullhead shark is a docile, slow-swimming species that feeds mainly on shelled invertebrates and small bony fishes. Reproduction is oviparous, with females laying spiral-flanged eggs in communal "nests". This species is of little interest to fisheries. Taxonomy The Japanese bullhead shark was originally described as ''Cestracion japonicus'' by ichthyologists Nicholas Miklouho-Maclay and William John Macleay, in an 1884 volume of ''Proceedings of the Linnean Society of New South Wales''. The type specimen is a female caugh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Port Jackson Shark
The Port Jackson shark (''Heterodontus portusjacksoni'') is a nocturnal, oviparous (egg laying) type of bullhead shark of the family (biology) , family Bullhead shark , Heterodontidae, found in the coastal region of southern Australia, including the waters off Port Jackson. It has a large, blunt head with prominent forehead ridges and dark brown harness-like markings on a lighter grey-brown body, and can grow up to long. They are the largest in the genus ''Heterodontus''. The Port Jackson shark is a Fish migration , migratory species, traveling south in the summer and returning north to breed in the winter. It feeds on hard-shelled mollusks, crustaceans, sea urchins, and fish. Identification of this species is very easy due to the pattern of harness-like markings that cross the eyes, run along the back to the first dorsal fin, then cross the side of the body, in addition to the spine in front of both dorsal fins. Distribution and habitat The Port Jackson shark is endemism , end ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zachary Hayward Baldwin
Zachary is a male given name, a variant of Zechariah – the name of several biblical characters. People *Pope Zachary (679–752), pope of the Catholic Church from 741 to 752 * Zachary of Vienne (died 106), bishop of Vienne (France), martyr and Roman Catholic saint *Zachary Abel (born 1980), American actor * Zachary Aston-Reese (born 1994), American ice hockey player *Zachary Babington (1690–1745), High Sheriff of Staffordshire and barrister *Zak Bagans (born 1977), American television host, author, documentary filmmaker and paranormal investigator * Zachary James Baker, stage name Zacky Vengeance, rhythm guitarist for American rock band Avenged Sevenfold *Zachary Bayly (military officer) (1841–1916), South African colonial military commander * Zachary Bayly (planter) (1721–1769), planter and politician in Jamaica *Zachary Bell (born 1982), Canadian racing cyclist *Zachary Bennett (born 1980), Canadian actor and musician *Zachary Blount (born 1977), American biologist *Z ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oman Bullhead Shark
The Oman bullhead shark, ''Heterodontus omanensis'', is a bullhead shark of the family Heterodontidae found in the tropical western Indian Ocean around central Oman, from the surface to a depth of on the continental shelf. This species has an average length of and can reach a maximum length of . This shark was described in 2005, making it one of the most recently described of its genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino .... The Oman bullhead shark likely is accidentally caught as bycatch, putting the species at risk. References * {{DEFAULTSORT:Oman Bullhead Shark Heterodontidae Fish of the Indian Ocean Fish described in 2005 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
José Luis Castro-Aguirre
José is a predominantly Spanish and Portuguese form of the given name Joseph. While spelled alike, this name is pronounced very differently in each of the two languages: Spanish ; Portuguese (or ). In French, the name ''José'', pronounced , is an old vernacular form of Joseph, which is also in current usage as a given name. José is also commonly used as part of masculine name composites, such as José Manuel, José Maria or Antonio José, and also in female name composites like Maria José or Marie-José. The feminine written form is ''Josée'' as in French. In Netherlandic Dutch, however, ''José'' is a feminine given name and is pronounced ; it may occur as part of name composites like Marie-José or as a feminine first name in its own right; it can also be short for the name ''Josina'' and even a Dutch hypocorism of the name ''Johanna''. In England, Jose is originally a Romano-Celtic surname, and people with this family name can usually be found in, or traced to, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leighton R
Leighton may refer to: Places In Australia: * Leighton, Western Australia, a beachside locality In the United Kingdom: *Leighton, Cambridgeshire * Leighton, Cheshire *Leighton, North Yorkshire **Leighton Reservoir * Leighton, Shropshire *Leighton, a village on the Wirral *Leighton Buzzard, a town in Bedfordshire, England *Leighton Hall, Lancashire *Leighton Hall, Powys, including Leighton Model Farm *Leighton House, Wiltshire, a country house *Leighton House Museum, a museum in London * Leighton Library, an historic library in Dunblane, Scotland * RSPB Leighton Moss, English nature reserve In the United States: *Leighton, Alabama *Leighton, Iowa *Leighton Township, Michigan In Asia: * Leighton Hill, Hong Kong People * Leighton (given name) * Leighton (surname) Other uses * CIMIC Group, Australian project development and contracting company until 2015 known as Leighton Holdings * Leighton Asia, a construction contractor headquartered in Hong Kong * Leighton Marshalling Yar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Painted Hornshark
The painted hornshark (''Heterodontus marshallae'') is a species of bullhead shark from northwestern Australia, described in 2023. It was previously considered conspecific with the Zebra bullhead shark. It is found from North West Cape North West Cape is a peninsula in the north-west of Western Australia. Cape Range National Park, Cape Range runs down the spine of the peninsula and Ningaloo Reef runs along the western edge. It is in the Gascoyne region and includes the town of ... to Bathurst Island. The painted hornshark looks much like a zebra shark with its dark bar and saddle coloring as shown, but the coloring of the tip of the snout and its fins is the difference between the two. References * Heterodontidae Fish described in 2023 {{batoid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William John Macleay
Sir William John Macleay (13 June 1820 – 7 December 1891) was a Scottish-Australian politician, naturalist, zoologist, and herpetologist. Early life Macleay was born at Wick, Caithness, Scotland, second son of Kenneth Macleay of Keiss and his wife Barbara, ''née'' Horne. Macleay was educated at the Edinburgh Academy 1834–36 and then to studied medicine at the University of Edinburgh; but when he was 18 years old his widowed mother died, and he decided to go to Australia with his cousin, William Sharp MacLeay. They arrived at Sydney in March 1839 on HMS ''Royal George''. William Macleay took up land at first near Goulburn, and afterwards on the Murrumbidgee River. He is noted as the last of the naturalists in a family active in this field; his uncle was Alexander Macleay, Colonial Secretary of New South Wales from 1826 to 1836, and a member and fellow of societies concerned with the flora and fauna of the empire's colonies. Political career On 1 March 1855 Macleay w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nicholas Miklouho-Maclay
Nicholai Nikolaevich Miklouho-Maclay (; 1846 – 1888) was a Russian explorer of Ukrainian origin. He worked as an ethnologist, anthropologist and biologist who became famous as one of the earliest scientists to settle among and study indigenous people of New Guinea "who had never seen a European".Webster, E. M. (1984). ''The Moon Man: A Biography of Nikolai Miklouho-Maclay''. University of California Press, Berkeley. 421 pages. Miklouho-Maclay spent the major part of his life travelling and conducted scientific research in the Middle East, Australia, New Guinea, Melanesia and Polynesia. Australia became his adopted country and Sydney the hometown of his family.Wongar, B., Commentary and Translator's Note in Miklouho-Maclay, N. N. ''The New Guinea Diaries 1871-1183'', translated by B. Wonger, Dingo Books, Victoria, Australia [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albert Günther
Albert Karl Ludwig Gotthilf Günther , also Albert Charles Lewis Gotthilf Günther (3October 18301February 1914), was a German-born British zoologist, ichthyologist, and herpetologist. Günther is ranked the second-most productive reptile taxonomist (after George Albert Boulenger) with more than 340 reptile species described. Early life and career Günther was born in Esslingen in Swabia ( Württemberg). His father was a ''Stiftungs-Commissar'' in Esslingen and his mother was Eleonora Nagel. He initially schooled at the Stuttgart Gymnasium. His family wished him to train for the ministry of the Lutheran Church for which he moved to the University of Tübingen. A brother shifted from theology to medicine, and he, too, turned to science and medicine at Tübingen in 1852. His first work was "''Ueber den Puppenzustand eines Distoma''" (On the pupal state of ''Distoma''). He graduated in medicine with an M.D. from Tübingen in 1858, the same year in which he published a handbook ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crested Bullhead Shark
The crested bullhead shark (''Heterodontus galeatus'') is an uncommon species of bullhead shark, in the family (biology), family Heterodontidae. It lives off the coast of eastern Australia from the coast to a depth of . This shark can be distinguished from other members of its family by the large size of the ridges above its eyes and by its color pattern of large dark blotches. It typically attains a length of . Nocturnal and benthic, bottom-dwelling, the crested bullhead shark favors rocky reefs and vegetated areas, where it hunts for sea urchins and other small organisms. It is oviparous, with females producing spiral-shaped mermaid's purse, egg capsules that are secured to seaweed or sponges with long tendrils. Sexual maturation is slow, with one female in captivity not laying eggs until almost 12 years of age. The International Union for Conservation of Nature has assessed this harmless shark as of Least Concern; it is of no economic interest and suffers minimal mortality fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
