Terminalinus Hopkins, 1915 stat. res.

Terminalinus Hopkins, 1915: 57.

Type species. Terminalinus terminaliae Hopkins, 1915.

Fortiborus Hulcr & Cognato 2010: 17. syn. nov.

Type species. Xyleborus major Stebbing, 1909.

Remarks. Hopkins (1915) erected Terminalinus for two Philippine species described from singleton specimens, T. terminaliae and T. dipterocarpi Hopkins, 1915, and defined his genus as having a 5-segmented funicle; club wider than long, anterior face with two bisinuate sutures, posterior face with one procurved suture; eyes large, coarse, elliptical, acutely emarginate. Schedl (1952b: 162) examined a severely damaged specimen and a single elytron of purported T. terminaliae specimens but did not state how this species was identified. Based on his observations, he placed the genus in synonymy with Xyleborus Eichhoff, 1864. Later in a paper on American Scolytidae, Wood (1986: 267) examined the T. terminaliae holotype, compared it to species in his collection, concluded the genus was valid, and included an additional nine species (many treated below). In their catalog of the world fauna, Wood & Bright (1992) omitted Wood’s (1986) recognition of Terminalinus and references of these combinations, and the included species were moved to Cyclorhipidion and Xyleborus without comment. Likely due to this catalog omission, and Wood’s (1986) recognition of the Indo-Malayan Terminalinus in a paper on the American fauna, this prior taxonomic action was not rediscovered by subsequent researchers. Unaware of this past action, Hulcr & Cognato (2010) erected a new genus, Fortiborus (2010), for the same species group but did not include T. terminaliae. Our examination of the T. terminaliae holotype (NMNH) shows that it unambiguously fits the concept of Fortiborus and therefore we place Fortiborus in synonymy with the older name, Terminalinus. The generic diagnoses of both genera also overlap.

The diagnosis of Terminalinus is that of Fortiborus given by Hulcr & Cognato (2010) and elaborated upon by Smith et al. (2020a). Species of Terminalinus are distinguished by their large size, 4.4−7.1 mm; pronotum robust, elytral declivity flattened and broadened laterally, apex angulate; anterior edge of pronotum extended anteriad, bearing a distinct row of serrations; antennal club distinctly pubescent, type 4; eyes very large, deeply emarginate, apex often acute; scutellum flat, flush with elytra; procoxae contiguous; and mycangial tufts absent.