Ctonoxylon atrum Browne, 2024

Jordal, Bjarte H., 2024, An integrated taxonomic revision of Ctonoxylon (Coleoptera, Curculionidae, Scolytinae) reveals new Malagasy species originating from multiple recent colonisations of the island, ZooKeys 1203, pp. 95-130 : 95-130

publication ID	https://doi.org/10.3897/zookeys.1203.123757
publication LSID	lsid:zoobank.org:pub:6FE93D4B-8104-45F4-850A-C1B78CA10A9D
DOI	https://doi.org/10.5281/zenodo.11373340
persistent identifier	https://treatment.plazi.org/id/F041320C-A74B-5813-9E3B-00876F657130
treatment provided by	ZooKeys by Pensoft (2024-05-28 19:19:19, last updated 2024-11-26 05:18:20)
scientific name	Ctonoxylon atrum Browne
status	stat. nov.

Treatment

Ctonoxylon atrum Browne View in CoL stat. rev.

Figs 68 View Figures 66–74 , 71 View Figures 66–74 , 74 View Figures 66–74

Ctonoxylon atrum Browne, 1965: 190 View in CoL .

Type material.

Holotype, male: Nigeria, Idanre [GIS: 7.12, 5.10], 30. 9. 1964, ex Canthium [ NHMUK].

Diagnosis.

Length 3.4 mm. 2.1–2.2 × as long as broad; colour pitch black. Male and female frons slightly impressed and impunctate on lower half, finely granulated above with short scattered setae; eye parts separated by 2 / 3 the size of upper half; anterior lateral margin of prothorax with elongated groove near procoxa; propleural pit present just above procoxa; pronotum with large and deep irregular punctures; elytral suture buckled at midlength, strial punctures longitudinally elongated, subquadrate; interstriae rough, with irregular punctures and rugosities; elytral apex emarginated; interstrial vestiture of confused rows of short, black, scale-like setae.

Distribution.

Ghana, Cameroon (new country).

New record.

Cameroon, Limbe, Ekande [GIS: 4.081, 9.172], 19. Nov. 2007, ex water liana, B. Jordal, leg [1, ZMUB] GoogleMaps .

Remarks.

This species is rather similar to C. methneri and was synonymised with C. hamatum by Schedl (1970). However, C. atrum is darker, with shorter elytral setae, the strial punctures are narrowly elongated and more separated, and the pronotal punctures are larger. It is genetically clearly separated from C. methneri and instead forms a sister relationship with C. quadrispinum sp. nov. (Fig. 11 View Figures 10–11 ).

References

Schedl KE (1970) Zur Synonymie der Borkenkäfer XX 272. Beitrag zur Morphologie und Systematik der Scolytoidea. Annalen des Naturhistorischen Museums in Wien 74: 221–231.

Figures

Figures 66–74. Dorsal, lateral, and front views of 66, 69, 72 Ctonoxylon quadrispinum female holotype 67, 70, 73 Ctonoxylon methneri male, and 68, 71, 74 Ctonoxylon atrum female holotype.

Figures 10–11. Phylogeny of Ctonoxylon. Node support is given as posterior probabilities above and parsimony bootstrap values below nodes 10 tree topology resulting from the parsimony analysis of 14 morphological characters for all species using implied weighting (Goloboff et al. 2018) 11 partial tree topology redrawn from a previously published Bayesian tree topology based on 1958 nucleotide position from three gene fragments (Jordal 2023). Species found in Madagascar marked in purple.