taxonID	type	description	language	source
03D087C9FFDAFFEF83CAAB0BED7212F3.taxon	type_taxon	Type species: Docophorus subalbicans Piaget, 1885: 6 [= Docophorus papuanus Giebel, 1879: 475], by original designation.	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFDAFFEF83CAAB0BED7212F3.taxon	discussion	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 ”.	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFED83CAA9F7ED5F1005.taxon	description	(Figs 1, 4, 6 – 8)	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFED83CAA9F7ED5F1005.taxon	materials_examined	Type host: Nesospiza acunhae Cabanis, 1873 — Inaccessible Island finch. Type locality: Inaccessible Island, Tristan da Cunha Archipelago, South Atlantic.	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFED83CAA9F7ED5F1005.taxon	diagnosis	Diagnosis. The only other member of the Guimaraesiella interposita species group in which the dorsal preantennal suture does not reach the ads is G. aedon sp. nov. Guimaraesiella inaccessibilis can be separated from G. aedon by the following characters: head proportionately longer and broader in G. inaccessibilis (Fig. 4) than in G. aedon (Fig. 5); proximal mesosome about as long as broad in G. inaccessibilis (Fig. 6), but broader than long in G. aedon (Fig. 9); mesosomal lobes with lateral ridge in G. aedon (Fig. 10), but no such ridge present in G. inaccessibilis (Fig. 7); abdomen of G. inaccessibilis with even yellow pigmentation, but abdomen on G. aedon with medium-brown pigmentation of sternal and subgenital plates, and dark-brown pigmentation on lateral sections of tergopleurites.	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFED83CAA9F7ED5F1005.taxon	description	Description Male. Head flat-dome shaped (Fig. 4), frons slightly flattened, lateral margins of preantennal area convex. Dorsal preantennal suture reaches dsms but does not reach ads or lateral margins of head. Head chaetotaxy as in Fig. 4. Thoracic and abdominal segments and chaetotaxy as in Fig. 1. Tergopleurites, sternal, and subgenital plates of even yellow pigmentation, darkening only laterally where ventral and dorsal sections of tergopleurites overlap. Male genitalia as in Figs 6 – 8. Basal apodeme widening proximally (Fig. 6). Proximal mesosome about as wide as long, widening slightly anteriorly (Fig. 7). Mesosomal lobes triangular, with near-right angles in anterior ends; no ridge near lateral margin; 2 ames and 3 pmes microsetae on each side forming near-continuous lines. Gonopore broad proximally, narrowly open distally; wide rugose area follows proximal margin of gonopore, but does not reach lateral margins of mesosome. Parameral heads large, irregular (Fig. 8). Parameral blades slender, tapering; pst 1 sensillum, near median margin; pst 2 microseta, central. Measurements (n = 2): TL = 1.32 – 1.53; HL = 0.38; HW = 0.35 – 0.36; PRW = 0.21 – 0.23; PTW = 0.33 – 0.34; AW = 0.38 – 0.47. Female. Unknown.	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFED83CAA9F7ED5F1005.taxon	etymology	Etymology: The species epithet is derived from the type locality: Latin “ inaccessibilis ” for “ not accessible ”.	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFED83CAA9F7ED5F1005.taxon	materials_examined	Type material. Ex Nesospiza acunhae: Holotype ♂, Inaccessible Island, Tristan da Cunha Archipelago, South Atlantic, Oct. / Nov. 1988, Peter G. Ryan, L- 2 (NHML). Paratype: 1 ♂, same data as holotype (NHML).	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFE983CAAC3FED2A14D9.taxon	description	(Figs 2 – 3, 5, 9 – 12)	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFE983CAAC3FED2A14D9.taxon	biology_ecology	Type host: Nesospiza questi Lowe, 1923 — Nightingale Island finch.	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFE983CAAC3FED2A14D9.taxon	distribution	Type locality: Nightingale Island, Tristan da Cunha Archipelago, South Atlantic.	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFE983CAAC3FED2A14D9.taxon	diagnosis	Diagnosis. See under G. inaccessibilis, above.	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFE983CAAC3FED2A14D9.taxon	description	Description Both sexes. Head flat-dome shaped (Fig. 5), frons slightly flattened, lateral margins of preantennal area convex. Dorsal preantennal suture reaches dsms but does not reach ads or lateral margins of head. Head chaetotaxy as in Fig. 5. Thoracic and abdominal segments as in Figs 2 – 3. Male. Thoracic and abdominal chaetotaxy as in Fig. 2. Male genitalia as in Figs 9 – 11. Basal apodeme widening slightly anteriorly (Fig. 9). Proximal mesosome shorter than wide (Fig. 10). Mesosomal lobes with near-parallel lateral margins in proximal end, converging distally; small ridge near lateral margins; 2 ames sensilla on each side near ridge; 1 pmes sensillum and 2 pmes microsetae on each side lateral to gonopore. Gonopore wide proximally, narrowly open distally; wide rugose area follows proximal margin of gonopore, reaching lateral margins of mesosome. Parameral heads large, irregular (Fig. 11). Parameral blades short, slender; pst 1 sensilla, near median margin; pst 2 microseta, central. Measurements (n = 2): TL = 1.22 – 1.25; HL = 0.34; HW = 0.31 – 0.32; PRW = 0.19; PTW = 0.27 – 0.29; AW = 0.36 – 0.37. Female. Thoracic and abdominal chaetotaxy as in Fig. 3. Subgenital plate broadly connected to partial cross-piece (Fig. 12). Vulval margin gently rounded (Fig. 12), with 2 – 3 long, slender vms on each side, and 3 – 5 short, thorn-like vss on each side; 5 long, slender vos on each side; distal 1 vos median to vss. Measurements (n = 2, except PTW, where n = 1): TL = 1.59 – 1.62; HL = 0.37; HW = 0.35 – 0.36; PRW = 0.22 – 0.24; PTW = 0.32; AW = 0.42 – 0.47.	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFE983CAAC3FED2A14D9.taxon	etymology	Etymology: The specific name is derived from Greek “ aëdon ” for “ nightingale ”, referring to the type locality as well as the common name of the type host.	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
03D087C9FFD8FFE983CAAC3FED2A14D9.taxon	materials_examined	Type material. Ex Nesospiza questi: Holotype ♂, Nightingale Island, Tristan da Cunha Archipelago, South Atlantic, Oct. / Nov. 1988, Peter G. Ryan, N 2 / 3 (NHML). Paratypes: 1 ♂, 2 ♀, same data as holotype (NHML).	en	Gustafsson, Daniel R., Bush, Sarah E. (2025): Two new species of Guimaraesiella Eichler, 1949 (Phthiraptera: Ischnocera: Philopteridae) from Tristan da Cunha finches. Zootaxa 5588 (2): 363-372, DOI: 10.11646/zootaxa.5588.2.10, URL: https://doi.org/10.11646/zootaxa.5588.2.10
