Opisthopatus

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Opisthopatus
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Onychophora
Class: Udeonychophora
Order: Euonychophora
Family: Peripatopsidae
Genus: Opisthopatus
Purcell, 1899
Species
See text

Opisthopatus is a genus of South African velvet worms in the family Peripatopsidae. [1] [2] The number of legs in this genus range from 16 pairs (e.g., in O. cinctipes ) to 18 pairs (in O. roseus ). [3] Mothers in this genus give birth to live young. [4] In particular, 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. [5]

Species

The genus contains the following species:

Related Research Articles

Macroperipatus is a genus of Neotropical velvet worms in the Peripatidae family. Velvet worms in this genus can have as few as 24 pairs of legs or as many as 42 leg pairs. This genus is viviparous, with mothers supplying nourishment to their embryos through a placenta.

Opisthopatus roseus is a species of velvet worm in the Peripatopsidae family. As traditionally defined, this species is rose pink with 18 pairs of legs. Known as the pink velvet worm, it is found only in the Weza Forest, a Mistbelt Forest in South Africa. Specimens have been found on the forest floor amongst leaf litter, beneath, and within fallen logs.

<i>Peripatopsis</i> Genus of velvet worms

Peripatopsis is a genus of South African velvet worms in the Peripatopsidae family. The number of legs in this genus ranges from as few as 16 pairs to as many as 25 pairs and varies within species when the number is greater than 18 pairs. Velvet worms in this genus feature a last pair of legs that is rudimentary or reduced in size, mainly in males. 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.

<span class="mw-page-title-main">Peripatidae</span> Family of invertebrate animals

Peripatidae is a family of velvet worms. The oldest putative representatives of the family herald from Burmese amber dated to the mid-Cretaceous, around 100 million years ago, with representatives from Dominican and Baltic amber attesting to a broader distribution in the Palaeogene / Neogene; molecular variability suggests that the family's crown group may have arisen in the early Mesozoic.

<span class="mw-page-title-main">Peripatopsidae</span> Family of invertebrate animals

Peripatopsidae is one of the two living velvet worm families.

<i>Ooperipatellus</i> Genus of velvet worms

Ooperipatellus is a genus of Australian and New Zealand velvet worms in the Peripatopsidae family. Species in this genus are oviparous. Most species in this genus have 14 pairs of legs, but O. nanus has only 13 pairs, which is the minimum number found in the phylum Onychophora. Velvet worms in this genus are among the smallest known, with adults often only 10 to 20 millimeters long. Morphological and molecular data indicate that this genus is a monophyletic group.

Metaperipatus is a genus of velvet worms in the family Peripatopsidae that includes the species Metaperipatus inae. Males of this species have 20 pairs of legs; females have 22 pairs. This species is a dark grayish blue in color, with large orange/red spots. When walking, females of this species can be as long as 85 mm, and males can be as long as 60 mm. The type locality is in central Chile.

Paropisthopatus is a monospecific genus of velvet worm containing the single species Paropisthopatus umbrinus. Females of this species range from 20 mm to 70 mm in length. The type locality is in central Chile. Velvet worms in this genus have 16 pairs of legs. 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.

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 up to 27 pairs in males and 29 pairs in females. 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.

Opisthopatus cinctipes is a species of velvet worm in the Peripatopsidae family. This species has 16 pairs of legs, all with claws and all used for walking. The color of the dorsal surface varies from blue to olive green. Females range from 7 mm to 50 mm in length, whereas males range from 6 mm to 36 mm. Like other velvet worms in this genus, this species exhibits matrotrophic viviparity, that is, mothers in this genus retain eggs in their uteri and supply nourishment to their embryos, but without any placenta. The type locality is in South Africa.

Opisthopatus amatolensis is a species of velvet worm in the Peripatopsidae family. This species has 16 pairs of legs. The type locality is in South Africa. The validity of this species is uncertain: Although some authorities deem O. amatolensis to be invalid even as a subspecies of O. cinctipes, a similar species also found in South Africa, other authorities recognize O. amatolensis as a separate species, citing the significant distance between the type localities of these two species.

Opisthopatus amaxhosa is a species of velvet worm in the family Peripatopsidae. This species is a clade in the O. cinctipes species complex. This species has 16 or 17 pairs of legs in both sexes and varies from light to dark pink on the dorsal surface and from dark to light brown on the ventral surface. Males of this species range from 12 mm to 14 mm in length. Also known as the Xhosa velvet worm, this species is found in the Eastern Cape province in South Africa.

Opisthopatus drakensbergi is a species of velvet worms in the family Peripatopsidae. This species is a clade in the O. cinctipes species complex. This species has 16 pairs of legs. Specimens are brown and slate black with a line down the middle of the back and a brown ventral surface. The original description of this species is based on a male holotype measuring 13 mm in length. This species is found at high altitude in the forests of the Drakensberg mountains in KwaZulu-Natal province in South Africa.

Opisthopatus highveldi is a species of velvet worm in the family Peripatopsidae. This species is a clade in the O. cinctipes species complex. This species has 16 pairs of legs and varies in color from brown to black to indigo. The original description of this species is based on two holotypes ranging from 16 mm to 17 mm in length. Also known as the Highveld velvet worm, this species is found in indigenous forest patches along the Highveld in Mpumalanga province in South Africa.

Opisthopatus laevis is a species of velvet worm in the Peripatopsidae family. This species has 16 pairs of legs. The type locality is in South Africa. The validity of this species is uncertain: Some authorities consider O. laevis invalid even as a subspecies of O. cinctipes, a similar species also found in South Africa, but other authorities recognize O. laevis as a separate species, citing the significant distance between the type localities of these two species.

Opisthopatus natalensis is a species of velvet worm in the Peripatopsidae family. This species has 16 pairs of legs. The type locality is in South Africa. The validity of this species is uncertain: Although some authorities have deemed O. natalensis to be a subspecies of O. cinctipes, a similar species also found in South Africa, and others regard O. natalensis as invalid even as a subspecies, still other authorities recognize O. natalensis as a separate species, citing the significant distance between the type localities of these two species.

<i>Peripatopsis moseleyi</i> Species of velvet worm

Peripatopsis moseleyi is a species of velvet worm in the Peripatopsidae family. Males of this species have 20 to 24 pairs of legs with claws ; females have 19 to 23 pairs of legs with claws. Females range from 11 mm to 75 mm in length, whereas males range from 9 mm to 50 mm. The type locality is in South Africa.

Peripatopsis sedgwicki is a species of velvet worm in the Peripatopsidae family. Also known as the Tsitsikamma velvet worm, this species varies from blue-tan green to bright orange and brown violet. The number of legs in this species ranges from 19 pairs to 23 pairs, with a claw present on the genital pair and the last pair reduced more in the male than in the female. Females of this species range in size from 12 mm to 68 mm in length, whereas males range from 10 mm to 46 mm in length. Like other velvet worms in this genus, this species exhibits matrotrophic viviparity, that is, mothers in this genus retain eggs in their uteri and supply nourishment to their embryos, but without any placenta. The type locality is in South Africa. This species has a limited geographic distribution but is especially abundant in the indigenous forest of the Tsitsikamma mountains.

<i>Peripatopsis alba</i> Species of velvet worm

Peripatopsis alba, the white cave velvet worm, is a species of velvet worm in the family Peripatopsidae. This species has 18 pairs of clawed legs, with the last pair reduced, and no eyes. Specimens range from 32 mm to 48 mm in length. Like other velvet worms in this genus, this species exhibits matrotrophic viviparity, that is, mothers in this genus retain eggs in their uteri and supply nourishment to their embryos, but without any placenta.

Opisthopatus herbertorum is a species of velvet worm in the Peripatopsidae family. The type locality is in South Africa. As originally described, this species is uniformly white with 17 pairs of legs. Subsequent phylogenetic results, however, cast doubt on this species delimitation based on morphology, indicating instead that O. herbertorum is a junior synonym of O. roseus.

References

  1. Oliveira I.; Hering L. & Mayer G. "Updated Onychophora checklist". Onychophora Website. Retrieved 13 July 2016.
  2. Oliveira, I. S.; Read, V. M. S. J. & Mayer, G. (2012). "A world checklist of Onychophora (velvet worms), with notes on nomenclature and status of names". ZooKeys (211): 1–70. doi: 10.3897/zookeys.211.3463 . PMC   3426840 . PMID   22930648.
  3. Daniels, Savel R.; Dambire, Charlene; Klaus, Sebastian; Sharma, Prashant P. (2016). "Unmasking alpha diversity, cladogenesis and biogeographical patterning in an ancient panarthropod lineage (Onychophora: Peripatopsidae: Opisthopatus cinctipes ) with the description of five novel species". Cladistics. 32 (5): 506–537. doi: 10.1111/cla.12154 . PMID   34727674. S2CID   49525550.
  4. Mayer, Georg; Bartolomaeus, Thomas & Ruhberg, Hilke (2005). "Ultrastructure of mesoderm in embryos of Opisthopatus roseus (Onychophora, Peripatopsidae): Revision of the 'long germ band' hypothesis for Opisthopatus". Journal of Morphology. 263 (1): 60–70. doi:10.1002/jmor.10289. PMID   15536644. S2CID   33663506.
  5. Mayer, Georg; Franke, Franziska Anni; Treffkorn, Sandra; Gross, Vladimir; de Sena Oliveira, Ivo (2015), Wanninger, Andreas (ed.), "Onychophora", Evolutionary Developmental Biology of Invertebrates 3, Vienna: Springer Vienna, pp. 53–98, doi:10.1007/978-3-7091-1865-8_4, ISBN   978-3-7091-1864-1 , retrieved 2023-02-15