Guimaraesiella Eichler, 1949

Guimaraesiella Eichler, 1949 View in CoL

Docophorus Nitzsch, 1818: 289 View in CoL (in partim).

Nirmus Nitzsch, 1818: 291 View in CoL (in partim).

Degeeriella Neumann, 1906: 60 View in CoL (in partim).

Brueelia Kéler, 1936: 257 View in CoL (in partim).

Guimaraesiella Eichler, 1949: 11 View in CoL .

Xobugirado Eichler, 1949: 13 View in CoL .

Allobrueelia Eichler, 1951: 36 View in CoL (in partim).

Allobrueelia Eichler, 1952: 74 View in CoL (near-verbatim redescription).

Maculinirmus Złotorzycka, 1964: 247 View in CoL (in partim).

Olivinirmus Złotorzycka, 1964: 246 View in CoL (in partim).

Allonirmus Złotorzycka, 1964: 263 View in CoL .

Nitzschnirmus Mey & Barker, 2014: 101.

Callaenirmus Mey, 2017: 92 View in CoL .

Philemoniellus Mey, 2017: 145 View in CoL .

Type species: Docophorus subalbicans Piaget, 1885: 6 View in CoL [= Docophorus papuanus Giebel, 1879: 475 ], by original designation.

Remarks: The two species described herein belong to a tentative group of lice here called the “ interposita species group”. Members of this group can be identified by the following combination of characters: head generally dome-shaped, but may have slightly flattened frons, never extended anteriorly as in Guimaraesiella papuana ( Giebel, 1879) ( Gustafsson & Bush, 2017, fig. 356); dorsal anterior plate continuous posteriorly with main head plate; antennae sexually monomorphic; female subgenital plate with at least partial cross-piece, often submarginal in lateral ends; male genitalia typical for Guimaraesiella (see Gustafsson & Bush 2017, figs 6–10, 358), without rugose nodi or thickenings on the mesosomal lobes, but also without a ventral sclerite. Most of the species in this group occur on thraupid hosts.

The “ interposita species group” includes at least the following species: Guimaraesiella interposita ( Kellogg, 1899) , G. melanococa ( Carriker, 1903) , G. ptiliogonis ( Carriker, 1903) , G. abbasi ( Carriker, 1956) , G. rhamphocelii ( Cicchino, 1983) , G. schistacea ( Cicchino, 1983) and G. atricapilla ( Cicchino, 1983) . Guimaraesiella taulis (Eichler [in Niethammer], 1956) probably belongs to this group as well, but the only known female is too poorly preserved to confirm its status. Guimaraesiella granatensis (Soler-Cruz, Rodríguez, Florido-Navío & Muñoz-Parra, 1987) may also belong to this group, but we have not examined any material of this species, and the original species description is not detailed enough to determine its position. However, not all Guimaraesiella from thraupid hosts belong to the interposita group. For instance, Guimaraesiella cubana ( Cicchino, 1983) does not belong to this group, but to a group of Guimaraesiella more commonly found on mimid hosts.

Since there was no species of the Guimaraesiella interposita species group included in the phylogeny of the Brueelia -complex by Bush et al. (2016), its position within Guimaraesiella is unknown. The species in the group are similar to the “core Guimaraesiella ” (sensu Gustafsson et al. 2019), and many species are superficially similar to species of Guimaraesiella found on thrushes ( Turdidae ). Notably, both species described here lack the anterior extension of the ventral sclerite in the male mesosome that is characteristic of the “core Guimaraesiella ”.