|
Paraperipatus
''Paraperipatus'' is a genus of velvet worms in the family Peripatopsidae. The number of legs vary within species as well as among species in this genus and can range from as few as 21 pairs (e.g., in '' P. ceramensis'') up to 27 pairs in males and 29 pairs in females (both in '' P. papuensis''). The maximum number of leg pairs recorded in this genus (29) is also the maximum number of leg pairs found in the family Peripatopsidae. This genus exhibits matrotrophic viviparity, that is, mothers in this genus retain eggs in their uteri and supply nourishment to their embryos, but without any placenta. Species in this genus are found in New Guinea and Maluku, Indonesia. Species The genus contains the following species: * ''Paraperipatus ceramensis'' ( Muir & Kershaw, 1909) * ''Paraperipatus keiensis'' Horst, 1923 * '' Paraperipatus lorentzi'' Horst, 1910 * '' Paraperipatus novaebritanniae'' (Willey, 1898) * '' Paraperipatus papuensis'' (Sedgwick, 1910) * '' Paraperipatus vanheur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraperipatus Lorentzi
''Paraperipatus lorentzi'' is a species of velvet worm in the Peripatopsidae family. This species is a dark green-blue. Females of this species have 22 to 28 pairs of legs; males have 21 or 22 pairs of legs. Whereas the original description of this species records 19 mm as the length of a male specimen, females range from 33 mm to 60 mm in length. The type locality is in Western New Guinea, Indonesia. The validity of this species is uncertain: Although some authorities deem ''P. lorentzi'' to be a junior synonym The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linna ... of '' P. papuensis'', a similar species also found in Western New Guinea, others recognize them as two separate species. References Onychophorans of Australasia Onychophoran species Animals descr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraperipatus Keiensis
''Paraperipatus keiensis'' is a species of velvet worm in the Peripatopsidae family. This species is green-black with yellow-brown spots. Females of this species have 24 or 25 pairs of legs; males have 22 or 23. Females range from 27 mm to 48 mm in length, whereas males range from 25 mm to 33 mm. The type locality is in Kai Besar, Indonesia. References Onychophorans of Australasia Onychophoran species Animals described in 1923 {{Onychophora-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraperipatus Novaebritanniae
''Paraperipatus novaebritanniae'' is a species of velvet worm in the Peripatopsidae family. This species is black with brown-yellow spots. Females of this species have 24 pairs of legs; males have 22 or 23 leg pairs. Females range from 14 mm to 55 mm in length, whereas males range from 14 mm to 26 mm. The type locality is in New Britain, Papua New Guinea. References Onychophorans of Australasia Onychophoran species Animals described in 1898 {{Onychophora-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraperipatus Vanheurni
''Paraperipatus vanheurni'' is a species of velvet worm in the Peripatopsidae family. This species ranges from pale blue or lilac to dark purple in color. Females of this species have 25 to 27 pairs of legs; males have 21 (or 22, counting a rudimentary last pair without feet). This species ranges from 15 mm to 60 mm in length. The type locality is in Western New Guinea, Indonesia. References Onychophorans of Australasia Onychophoran species Animals described in 1922 {{Onychophora-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onychophora
Onychophora (from grc, ονυχής, , "claws"; and , , "to carry"), commonly known as velvet worms (due to their velvety texture and somewhat wormlike appearance) or more ambiguously as peripatus (after the first described genus, '' Peripatus''), is a phylum of elongate, soft-bodied, many-legged panarthropods. In appearance they have variously been compared to worms with legs, caterpillars, and slugs. They prey upon other invertebrates, which they catch by ejecting an adhesive slime. Approximately 200 species of velvet worms have been described, although the true number of species is likely greater. The two extant families of velvet worms are Peripatidae and Peripatopsidae. They show a peculiar distribution, with the peripatids being predominantly equatorial and tropical, while the peripatopsids are all found south of the equator. It is the only phylum within Animalia that is wholly endemic to terrestrial environments, at least among extant members. Velvet worms are generally c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraperipatus Ceramensis
''Paraperipatus ceramensis'' is a species of velvet worm in the family Peripatopsidae. This species is grey-green with rust speckles. Females of this species have 21 or 22 pairs of legs (usually 21) and range from 13 mm to 55 mm in length. The type locality is in Seram, Indonesia. References Further reading * Onychophorans of Australasia Onychophoran species Animals described in 1909 {{Onychophora-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraperipatus Papuensis
''Paraperipatus papuensis'' is a species of velvet worm in the Peripatopsidae family. This species is a pale greenish blue. Females of this species may have as few as 21 pairs of legs or as many as 29 pairs, exhibiting the greatest intraspecific variation in leg number found in any peripatopsid species. Males have 21 to 27 leg pairs. The maximum number of leg pairs recorded in this species (29) is also the maximum number of leg pairs found in the family Peripatopsidae. Females range from 22 mm to 83 mm in length, whereas males range from 19 mm to 45 mm. The type locality is in Western New Guinea, Indonesia. References Further reading * Onychophorans of Australasia Onychophoran species Animals described in 1910 {{Onychophora-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onychophorans Of Australasia
Onychophora (from grc, ονυχής, , "claws"; and , , "to carry"), commonly known as velvet worms (due to their velvety texture and somewhat wormlike appearance) or more ambiguously as peripatus (after the first described genus, '' Peripatus''), is a phylum of elongate, soft-bodied, many-legged panarthropods. In appearance they have variously been compared to worms with legs, caterpillars, and slugs. They prey upon other invertebrates, which they catch by ejecting an adhesive slime. Approximately 200 species of velvet worms have been described, although the true number of species is likely greater. The two extant families of velvet worms are Peripatidae and Peripatopsidae. They show a peculiar distribution, with the peripatids being predominantly equatorial and tropical, while the peripatopsids are all found south of the equator. It is the only phylum within Animalia that is wholly endemic to terrestrial environments, at least among extant members. Velvet worms are generally c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peripatopsidae
Peripatopsidae is one of the two living velvet worm families. Description The Peripatopsidae exhibit relatively many characteristics that are perceived as original or "primitive" with respect to the Peripatidae. The number of leg pairs in this family range from as few as 13 (in ''Ooperipatellus nanus'') to as many as 29 (in ''Paraperipatus papuensis''). Behind or between the last leg pair is the genital opening (gonopore). Both oviparous and ovoviviparous, as well as genuinely viviparous, species exist, although the Peripatopsidae essentially lack a placenta. Distribution The distribution of the Peripatopsidae is circumaustral; in particular, they inhabit Australasia, South Africa and Chile. Genera The family contains the following genera: * '' Acanthokara'' Reid, 1996 * '' Aethrikos'' Reid, 1996 * '' Aktinothele'' Reid, 1996 * ''Anoplokaros'' Reid, 1996 * '' Austroperipatus'' Baehr, 1977 * '' Baeothele'' Reid, 1996 * ''Centrorumis'' Reid, 1996 * '' Cephalofovea'' Ruhberg et al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Kershaw (entomologist)
John Crampton Wilkinson Kershaw (1871 – 26 August 1959) was a British explorer, naturalist and entomologist who explored and collected in South China and Australia. He was among the first entomologists to successfully rear tachinid parasitoids in quantity for use in biological control. Kershaw was born in Boughton, Nottinghamshire, where his father George was a vicar. Like two of his brothers, Bertram and Sidney, he took an interest in entomology from a young age. He was influenced by David Sharp and Edward Poulton. In 1898 he went to Hong Kong and there he met amateur ornithologist Frederick William Styan and became interested in the birds of the Macao region. He helped Frederick A. G. Muir of the Hawaiian Sugar Planters' Association in entomological studies between 1906 and 1907 to locate parasites of sugarcane pests. In 1906 Kershaw published a book on the ''Butterflies of Hong Kong''. Kershaw continued to work with the sugarcane planters' association and travelled to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matrotrophy
Matrotrophy is a form of maternal care during organism development, associated with live birth (viviparity), in which the embryo of an animal or flowering plant is supplied with additional nutrition from the mother (e.g. through a placenta). This can be contrasted with lecithotrophy, in which the only source of nutrition for the embryo is yolk originally contained within its egg. Vegetal matrotrophy In plants, matrotrophy is considered a critical evolutionary development preceding the origin of embryophytes and therefore essential to the evolution of land plants. Matrotrophy is facilitated by cytological and ultrastructural modifications on one or both sides of the generational junction, a region called the placenta. Specialization of the placental cells pertains further to their cytological and ultrastructural characteristics: the cytoplasm is often dense and rich in lipids, the vacuole is typically reduced but large in ''Sphagnum'', the endoplasmic reticulum extensive, mitochon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viviparous
Among animals, viviparity is development of the embryo inside the body of the parent. This is opposed to oviparity which is a reproductive mode in which females lay developing eggs that complete their development and hatch externally from the mother. The term 'viviparity' and its adjective form 'viviparous' derive from the Latin ''vivus'' meaning "living" and ''pario'' meaning "give birth to". Reproductive mode Five modes of reproduction have been differentiated in animals based on relations between zygote and parents. The five include two nonviviparous modes: ovuliparity, with external fertilisation, and oviparity, with internal fertilisation. In the latter, the female lays zygotes as eggs with a large yolk; this occurs in all birds, most reptiles, and some fishes. These modes are distinguished from viviparity, which covers all the modes that result in live birth: *Histotrophic viviparity: the zygotes develop in the female's oviducts, but find their nutrients by oophagy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Onychophorans Of Australasia")
