Peripatopsis

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Peripatopsis
Peripatopsis capensis Leg anatomy IMG 0783a.JPG
Illustration of the oncopods (legs) of Peripatopsis capensis
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Onychophora
Family: Peripatopsidae
Genus: Peripatopsis
Pocock, 1894
Species

See text

Peripatopsis is a genus of velvet worms in the Peripatopsidae family. [1] [2] These velvet worms are found in the KwaZulu-Natal, Western Cape, and Eastern Cape provinces of South Africa. [3] This genus was proposed by the British zoologist Reginald I. Pocock in 1894 with Peripatopsis capensis designated as the type species. [4]

Contents

Description

The number of legs in this genus ranges from as few as 16 pairs (e.g., in P. clavigera ) [5] to as many as 25 pairs (in P. moseleyi ) and varies within species when the number is greater than 18 pairs. [3] Velvet worms in this genus feature a last pair of legs (the genital pair) that is rudimentary or reduced in size, mainly in males. [3] The feet in this genus feature three distal leg papillae: two anterior and one posterior. [6] The gonopore in the male is cross-shaped but in the female takes the form of a longitudinal slit. [3]

Reproduction

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. [7] Eggs are fertilized through dermal insemination. [3] Males place spermatophores on the skin of females, which allows the entry of sperm at the point of contact. Embryonic development in this genus takes 12 to 13 months, during which the mother contains up to 20 embryos, all at about the same stage of development. The young are born alive tail first, one or two at a time, all within a short period of time. The young resemble adults in form but are smaller. [6]

Species

The genus Peripatopsis consists of the following species:

Related Research Articles

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.

Opisthopatus is a genus of South African velvet worms in the family Peripatopsidae. The number of legs in this genus range from 16 pairs to 18 pairs. The feet in this genus feature three distal leg papillae: one anterior, one posterior, and one median. Mothers in this genus give birth to live young. 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.

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

Peripatopsidae is one of the two living velvet worm families. This family includes more than 140 described species distributed among 41 genera, but some authorities deem only 131 of these species to be valid. The French zoologist Eugène Louis Bouvier proposed this family in 1905 with Peripatopsis as the type genus.

Metaperipatus is a genus of velvet worms in the family Peripatopsidae that contains two species found in Chile, including Metaperipatus inae. This genus was created by the American zoologist Austin Hobart Clark in 1913 to contain the type species, M. blainvillei. Authorities believe M. blainvillei is a species complex, however, and some consider M. blainvillei a nomen dubium.

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.

Peripatopsis balfouri is a species of velvet worm in the Peripatopsidae family. This species has 18 pairs of clawed legs. Also known as the blue velvet worm, this species ranges from 9 mm to 22 mm in length. The type locality is in South Africa.

Peripatopsis birgeri is a species of velvet worm in the family Peripatopsidae. This species is a clade in the P. moseleyi species complex. The number of legs in this species varies from 21 pregenital pairs to 22 pregenital pairs. Live animals are light green, brown, or black with a distinct pale head collar; the ventral surface is creamy white. Males range from 23 mm to 40 mm in length; females range from 28 mm to 40 mm in length. Also known as the Mount Currie velvet worm, this species is known only from the Mount Currie Nature Reserve in South Africa.

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

Peripatopsis capensis is a species of velvet worm in the Peripatopsidae family. This species has 18 pairs of legs: 17 pregenital leg pairs with claws plus one strongly reduced last pair without claws or spinous pads. Females of this species range from 9 mm to 70 mm in length, whereas males range from 6 mm to 54 mm. The native range of this species is limited to the Cape Peninsula of South Africa.

Peripatopsis hamerae is a species of velvet worm in the family Peripatopsidae. This species is a clade in the P. moseleyi species complex. The original description of this species is based on one specimen of each sex, each measuring 22 mm in length with a black dorsal surface and creamy white ventral surface. The male of this species has 22 pairs of pregenital legs and one pair of genital legs; the female has 23 pairs of pregenital legs and one pair of genital legs. Also known as the Kamala velvet worm, this species is known only from Groot Bruintjieshoogte in South Africa.

Peripatopsis janni is a species of velvet worm in the family Peripatopsidae. This species is a clade in the P. moseleyi species complex. The original description of this species is based on male specimens ranging from 15 mm to 30 mm in length. Live animals are dark green on the dorsal surface but greyish white on the ventral surface. The number of legs in males of this species varies from 21 pregenital pairs to 22 pregenital pairs. Also known as the Amathole velvet worm, this species is found in the Amathole mountains in South Africa.

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

Peripatopsis lawrencei is a species of velvet worm in the Peripatopsidae family. This species has 18 pairs of legs: 17 pregenital leg pairs plus one last pair that is strongly reduced and without claws or spinous pads. This species is restricted to the Theewaterskloof-Overstrand region of South Africa.

<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 has a narrow geographic distribution in South Africa but is especially abundant in the indigenous forest of the Tsitsikamma mountains. Recent phylogenetic analysis suggests that Peripatopsis sedgwicki is a species complex that contains three clades, each with a distinct geographic distribution, including at least one clade that may represent a novel species.

Peripatopsis storchi is a species of velvet worm in the family Peripatopsidae. This species is a clade in the P. moseleyi species complex. The number of legs in this species ranges from 21 pregenital pairs to 23 pregenital pairs. Males of this species range from 12 mm to 22 mm in length, and females range from 22 mm to 36 mm in length, but live animals can stretch to 50 mm while walking. Also known as the Katberg velvet worm, this species is known only from the Katberg forest in South Africa.

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

Peripatopsis clavigera, the Knysna velvet worm, is a species of velvet worm in the Peripatopsidae family. This species has 16 pairs of legs and ranges from 4 mm to 17 mm in length. Peripatopsis clavigera is found in subtropical or tropical moist montane forests of the Diepwalle Nature Reserve in South Africa.

Peripatopsis edenensis is a species of velvet worm in the family Peripatopsidae. This species is a clade in the P. clavigera species complex. This species has 16 pairs of legs, varies from slate black to charcoal, and ranges from 4 mm to 17 mm in length. Also known as the Eden velvet worm, this species is found in the Garden of Eden Nature Reserve and in forests along the coast of Western Cape province in South Africa.

Peripatopsis ferox is a species of velvet worm in the family Peripatopsidae. This species is a clade in the P. clavigera species complex. This species has 17 pairs of legs, varies from slate black to brown, and ranges from 17 mm to 28 mm in length. Also known as the Wilderness velvet worm, this species has an extensive distribution across many patches of forest in Western Cape province in South Africa.

Peripatopsis mellaria is a species of velvet worm in the family Peripatopsidae. This species is a clade in the P. clavigera species complex. This species has 17 pairs of legs, varies from slate black to charcoal, and ranges from 11 mm to 20 mm in length. Also known as the Outeniqua velvet worm, this species is found in forests along the coast in Western Cape province in South Africa.

Peripatopsis mira is a species of velvet worm in the family Peripatopsidae. This species is a clade in the P. clavigera species complex. This species has 17 pairs of legs, varies from slate black to charcoal, and is found on the south-facing slope of the Outeniqua mountain range in Western Cape province in South Africa.

Peripatopsis tulbaghensis is a species of velvet worm in the family Peripatopsidae. This species is dark brown with 17 pairs of legs and ranges from 8 mm to 32 mm in length. Also known as the Tulbagh velvet worm, this species is found in Groot Winterhoek mountain region in South Africa.

References

  1. Oliveira I. S.; 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. Bibcode:2012ZooK..211....1O. doi: 10.3897/zookeys.211.3463 . PMC   3426840 . PMID   22930648.
  3. 1 2 3 4 5 Ruhberg, Hilke; Daniels, Savel R. (2013-05-24). "Morphological assessment supports the recognition of four novel species in the widely distributed velvet worm Peripatopsis moseleyi sensu lato (Onychophora : Peripatopsidae)". Invertebrate Systematics. 27 (2): 131–145. doi:10.1071/IS12069. ISSN   1447-2600. S2CID   86036034.
  4. Pocock, R. I. (1894). "Contributions to our Knowledge of the Arthropod Fauna of the West Indies.-Part III. Diplopoda and Malacopoda, with a Supplement on the Arachnida of the Class Pedipalpi". Journal of the Linnean Society of London, Zoology. 24 (157): 473–544 [519]. doi:10.1111/j.1096-3642.1894.tb02494.x. ISSN   0368-2935.
  5. Barnes, Aaron; Reiss, Till; Daniels, Savel R. (2020). "Systematics of the Peripatopsis clavigera species complex (Onychophora : Peripatopsidae) reveals cryptic cladogenic patterning, with the description of five new species". Invertebrate Systematics. 34 (6): 569–590. doi:10.1071/IS19071. ISSN   1445-5226. S2CID   221666417.
  6. 1 2 Hamer, M.L.; Samways, M.J.; Ruhberg, H. (1997). "A review of the Onychophora of South Africa, with discussion of their conservation". Annals of the Natal Museum. 38 (1): 283–312.
  7. 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