Typoderus iphitus, 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

4.2.5. Typoderus iphitus sp. nov. Figs 1 , 2 , 3 , 4 , 8A-H.

Species diagnosis and description.

Holotype male (Figs 8A-H ), length between anterior edge of pronotum and elytral apex 4.6 mm, DNA barcode: MH917891. Diagnostic combination of morphological characters as in Table 4 . Sister clade to T. amphion sp. nov., T. telamon sp. nov. and T. clytius sp. nov. (Fig. 3 ).

Material examined.

Holotype male ( CNC): " CAMEROON, Mt. Kupe , 4.8017, 9.7015, 1977m, 29.xii.2015, sift.CM15, V.Grebennikov ", “CNCCOLVG00009722” . Paratypes ( CNC): 4, as in Fig. 3 ; specimens 9556, 9723 and 9724: same data as holotype; specimen 9531: " CAMEROON, Mt. Kupe , 4.8193, 9.7075, 1525m, 29.xii.2015, sift.CM13, V.Grebennikov " .

Distribution.

Known only from Mt. Kupe in Cameroon, in sympatry with T. telamon sp. nov. Elevation: 1,525-1,977 m.

Etymology.

Iphitus, from ancient Greek mythology, one of the Argonauts, brother of Clytius; noun in apposition.

Comment.

Being morphologically indistinguishable and sympatric, it is more parsimonious to treat all specimens assigned to this species as the same biological entity, despite a relatively deep intraspecific divergence (Figs 2 - 4 ).

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 8. Male holotype of T. iphitus 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.