Phoberus cyrtus

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Phoberus cyrtus
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Family: Trogidae
Subfamily: Troginae
Genus: Phoberus
Species:
P. cyrtus
Binomial name
Phoberus cyrtus
Haaf, 1953

Phoberus cyrtus is a species of hide beetle in the subfamily Troginae discovered by Erwin Haaf in 1953. [1] [2]

Contents

Taxonomy

Taxonomically, P. cyrtus was initially placed in the subgenus Trox (Phoberus). When Phoberus was elevated to a full genus, taxonomists moved P. cyrtus from the genus Trox to the genus Phoberus. [2] [3]

Within the genus Phoberus, P. cyrtus is most similar to P. fumarius and P. sulcatus, and researchers have often confused the three hide beetle species for each other. Carefully inspecting the hide beetles' male genitalia suffices to distinguish the three species. The male genitalia of P. cyrtus have narrow median lobes that finish at an angular apex, while those of P. fumarius have broad median lobes finishing at a rounded apex. Furthermore, the median lobe of P. sulcatus is divided into two curved sublobes, a feature found in neither P. cyrtus nor P. fumarius. [3]

Morphology

Phoberus cyrtus is between 9 and 13 millimeters long and 5 and 8 millimeters wide. The elytra, or forewings, of the beetle are fringed laterally with long hair-like setae that angle backwards, away from the hide beetle's head. Like other hide beetles, this species' elytra are covered under hard carapaces; P. cyrtus' exoskeleton on both the elytra and the pronotum is a darkish matt black, with clumps of setae tufts protruding almost like spikes from the carapace. These tufts are yellow and measure less than half a millimeter in height. As one moves towards the beetle's head, the setae change color; setae on the head are long and light brown, and setae ranging from dark yellow to bright red and rust-brown fringe the mouth of P. cyrtus. [3]

P. cyrtus has a triangular clypeus, which refers to the shape of the exoskeleton plate covering its head. The beetles' heads also finish at a rounded apex. [3]

P. cyrtus has especially long parameres that are only slightly shorter than their penis-like aedeagus's length. Male P. cyrtus beetles have two bladelike protrusions and rows of hooks between their genitalia's median lobes and parameres, which enable them to more effectively grasp onto and copulate with females. [3]

Distribution and Diet

P. cyrtus lives within Lesotho, southern Botswana, and the South African provinces of Eastern Cape, KwaZulu-Natal, Mpumalanga, and North West. [3] [2] A versatile species, the beetle thrives in both grasslands, marked by moderately cold temperature and moderately frequent precipitation, and in savannahs, which are hot and have protracted dry periods. Still, Phoberus cyrtus depends heavily on rainfall patterns, and its range is restricted to summer rainfall regions, where it rains primarily during summer months. [3]

This ground-based beetle is a detritivore and survives by consuming keratin from shed, excreted, or rotting animal material. [3]

Related Research Articles

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Phoberus is a genus of hide beetle in the subfamily Troginae. It was initially a subgenus of Trox before taxonomists reorganized it into its own genus. The genus is monophyletic, with all species evolved from a single common ancestor. Most beetle species in the genus live in Africa.

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Phoberus sternbergi is a species of hide beetle in the subfamily Troginae discovered by the scientists van de Merwe and Scholtz in 2005. Like with many other beetle species, P. sternbergi has not been observed again after its discovery, so all knowledge of the species comes from the 8 individual beetles van de Merwe and Scholtz saw during fieldwork.

Phoberus ngomensis is a species of hide beetle in the subfamily Troginae discovered by the scientists van de Merwe and Scholtz in 2005. Like with many other beetle species, P. ngomensis has not been observed again after its discovery, so all knowledge of the species comes from the 166 individual beetles van de Merwe and Scholtz saw during fieldwork.

Phoberus fumarius is a species of hide beetle in the subfamily Troginae discovered by Erwin Haaf in 1953.

Phoberus disjunctus is a species of hide beetle in the subfamily Troginae discovered by coleopterologist Werner P. Strümpher in 2016.

Phoberus herminae is a species of hide beetle in the subfamily Troginae discovered by coleopterologist Werner P. Strümpher in 2016.

References

  1. "Phoberus". BioLib.
  2. 1 2 3 "Phoberus MacLeay, 1819". GBIF.
  3. 1 2 3 4 5 6 7 8 Strümpher, Werner P.; Stals, Riaan (March 16, 2021). "Proper cleaning of keratin beetles reveals a cryptic species: Phoberus fumarius (Haaf, 1953) from southern Africa is reinstated as valid (Coleoptera: Trogidae)". Zootaxa. 4924 (4): 543–549.