Typoderus clytius, Grebennikov, 2021

Grebennikov, Vasily V., 2021, Sky islands of the Cameroon Volcanic Line support the westernmost clade of five new Typoderus weevils (Coleoptera: Curculionidae: Molytinae), Arthropod Systematics & Phylogeny 79, pp. 57-74 : 57

4.2.4. Typoderus clytius sp. nov. Figs 1 , 2 , 3 , 4 , 7A-H.

Species diagnosis and description.

Holotype male (Figs 7A-H ), length between anterior edge of pronotum and elytral apex 5.6 mm, DNA barcode: MH981205. Diagnostic combination of morphological characters as in Table 4 . Sister clade to four other CVL Typoderus (Fig. 3 ). Externally similar to allopatric T. telamon sp. nov.; can be distinguished by pilosity on elytral declivity similar in density and length to than on the rest of elytra (Fig. 7A versus Fig. 9A ).

Material examined.

Holotype male (CNC): " CAMEROON, Mt. Cameroon, 4.1175, 9.0718, 1079m, 28.xii.2015, sift.CM07, V.Grebennikov ", “CNCCOLVG00009731” . Paratypes (CNC): 4, as in Fig. 3 ; specimen 9511: same data as holotype; specimens 9375, 9376, 9732: " CAMEROON, Mt. Cameroon, 4.1001, 9.0629, 638m, 28.xii.2015, sift.CM06, V.Grebennikov " .

Distribution.

Known only from Mt. Cameroon in Cameroon; no sympatric congeners are known. Elevation: 638-1,079 m.

Etymology.

Clytius, from ancient Greek mythology, one of the Argonauts, master archer, killed together with his brother Iphitus by Heracles; noun in apposition.

Figures

Figure 1. Distribution of the genus Typoderus. Map designed using the online SimpleMappr tool (Shorthouse 2010).

Figure 2. Neighbour Joining clustering of 20 DNA barcodes of Cameroonian Typoderus (analysis A 1). Terminal names consist of BOLD sample ID (its last four digits correspond to specimen number), litter sifting sample number (Table 1), length of the DNA barcode (number of ambiguous nucleotides is in square brackets), BIN three-letter four-digit number and GenBank accession number. Names next to clusters are those of the new species described in section 4.2. HT denote holotypes.

Figure 3. Maximum Likelihood inference phylogram of Typoderus weevils rooted on Lupangus (analysis A 3, root is not shown). Cameroonian species form a clade. Digits at internodes are bootstrap values of 50 % and above. Non-Cameroonian (= Tanzanian) terminals are collapsed in species. Terminal names consist of specimen number (Table 3) and sifting sample number (Table 1). Habitus images are to scale; their numbers indicate exact Cameroonian specimens imaged. Names next to clades are those of the new species described in section 4.2.

Figure 4. Maximum clade credibility Cameroonian Typoderus tree with median ages derived from the BEAST analysis A 4. The 95 % credibility interval for each node is given with a horizontal bar. Digits at nodes are million years before present. Terminal names consist of specimen number (Table 3), GenBank accession number and sifting sample number (Table 1). Names next to clades are those of the new species described in section 4.2.

Figure 7. Male holotype of T. clytius sp. nov., habitus (A: dorsal, B: left lateral, C: ventral, D: left fronto-lateral), aedeagus (E: dorsal, F: ventral, G: right lateral) and H: sternite 9.

Figure 9. Male holotype of T. telamon sp. nov., habitus (A: dorsal, B: left lateral, C: ventral, D: left fronto-lateral), aedeagus (E: dorsal, F: ventral, G: right lateral) and H: sternite 9.