Les Scolytidae Africains — Première Note Révision du Genre Xyloctonus [Col.]

Menier, J. J.

doi:10.1080/21686351.1974.12278175

Cited by 1 publication

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A stridulatory apparatus sometimes present, but varies in size and distinctness. Menier (1974) reported the pres-ence of a stridulatory file in the upper frons of male X. quadridens, which was not observed in the new material. The males of this species have a spine on the ventral side of the femur, but, nevertheless, there was no pars stridens present in any of the new specimens collected.…”

Section: Plastic Dimorphismmentioning

confidence: 48%

“…Biology. Known from the two collections in Uganda; the non-type series were dissected from Tabernaemontana holzkii (Apocynaceae) (see Menier (1974)).…”

Section: Xyloctonus Niger Schedl 1938mentioning

confidence: 99%

“…Comments. According to Menier (1974), the male should have a pars stridens on its vertex. However, none of the males at hand had this feature, despite the unique presence of a femoral spine (n = 4).…”

Section: Xyloctonus Quadridens Schedl 1953mentioning

confidence: 99%

“…Ctonoxylon and Xyloctonus are, on the other hand, taxonomically stable groups at the generic level and their morphology leaves little doubt about their affinity (Jordal 2023). The peculiar look of Xyloctonus (Figs 1, 2) and the other genera in subtribe Xyloctonina is most strikingly expressed in the rounded and inflated shape of the pronotum, a deep groove on the anterior side of the protibiae and the impressed lateral sclerites of the metathorax for reception of femur and tibiae (Menier 1974). Such highly-specialised features led some authors to place these weird beetles in their own subfamily Xyloctoninae (Hopkins 1915;Schedl 1961b) or family Xyloctonidae (Eichhoff 1878).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Integrated taxonomy, biology and biogeography of the Afrotropical genus Xyloctonus (Coleoptera, Curculionidae, Scolytinae)

Jordal

2024

DEZ

View full text Add to dashboard Cite

The peculiar Afrotropical bark beetle genus Xyloctonus Eichhoff, 1872 is revised and its biology described. Several unusual morphological features reflect adaptations to predator avoidance as they are highly exposed during mating externally on tree trunks and branches. Observations invariably indicate that males and females abandon the nest under bark at an early stage of progeny, the males already before eggs hatch, potentially engaging in subsequent additional matings. Most species have a clear preference for host plants in the plant family Sapotaceae. Although the genus is broadly distributed in forested parts of Africa, Madagascar and Mauritius, most species are found in the eastern part of this range. A Bayesian biogeographical analysis revealed a possible origin of the genus in Madagascar in the early Eocene, with subsequent colonisation of the southern African region in late Eocene. This contrasts with the closely-related xyloctonine genus Ctonoxylon Hagedorn, 1910, which is of western Congolian ancestry and more recently reached Madagascar multiple times during late Miocene. Two new species are described: Xyloctonus magnussp. nov. from Madagascar and X. genierisp. nov. from Burkina Faso. Synonyms are proposed for X. subcostatus Eggers, 1939 (= X. striatus Eggers, 1939) and X. scolytoides Eichhoff, 1872 (= X. latus Eggers, 1922). Identification to species is provided in a key illustrated with photographs of most species.

show abstract

Section: Plastic Dimorphismmentioning

confidence: 48%

“…Biology. Known from the two collections in Uganda; the non-type series were dissected from Tabernaemontana holzkii (Apocynaceae) (see Menier (1974)).…”

Section: Xyloctonus Niger Schedl 1938mentioning

confidence: 99%

Section: Xyloctonus Quadridens Schedl 1953mentioning

confidence: 99%