taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
E02A9F0DC67654DE84EEFF46F64562B3.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1573696	https://doi.org/10.3897/zookeys.1275.182781.figure2	Figure 2. Morphological comparison of A. Lomechusoides strumosus (Male. w. Formica sanguinea, Feldborg Nørreskov, Jutland, Denmark); B. L. umbrosus sp. nov. (Male holotype. w. F. polyctena, Hammarskog, Uppsala, Sweden). The antennomeres, especially the 3 rd segment, of L. strumosus (C) are thicker and shorter than in L. umbrosus sp. nov. (D). From lateral view, the pronotal lateral margins have a blunt edge in L. strumosus (E), while they have a short sharp edge posteriorly in L. umbrosus sp. nov. (female paratype) (G). The frontal median impression of the brown head is dull with clear, even microsculpture in L. strumosus (F), while the head is black and the frontal median impression is shiny with weak, uneven microsculpture in L. umbrosus sp. nov. (H). The pronotal disc is dull with even light microsculpture, pronotal margins subparallel posteriorly, suddenly narrowing frontally, and with widest point at or immediately anterior thereof in L. strumosus (I). The pronotal disc is very glossy with almost no microsculpture, lateral margins smoothly curved in their entire length, with widest point at ¼ – ⅓ of the marginal length from the anterior corners in L. umbrosus sp. nov. (J). Transverse carinae of the anterior part of tergite II – V unconnected in their entire length in L. strumosus (K), while they are connected in the centre of the tergite by a broad septum (marked with arrows), occasionally two or more broad septa, in L. umbrosus sp. nov. (L).	Figure 2. Morphological comparison of A. Lomechusoides strumosus (Male. w. Formica sanguinea, Feldborg Nørreskov, Jutland, Denmark); B. L. umbrosus sp. nov. (Male holotype. w. F. polyctena, Hammarskog, Uppsala, Sweden). The antennomeres, especially the 3 rd segment, of L. strumosus (C) are thicker and shorter than in L. umbrosus sp. nov. (D). From lateral view, the pronotal lateral margins have a blunt edge in L. strumosus (E), while they have a short sharp edge posteriorly in L. umbrosus sp. nov. (female paratype) (G). The frontal median impression of the brown head is dull with clear, even microsculpture in L. strumosus (F), while the head is black and the frontal median impression is shiny with weak, uneven microsculpture in L. umbrosus sp. nov. (H). The pronotal disc is dull with even light microsculpture, pronotal margins subparallel posteriorly, suddenly narrowing frontally, and with widest point at or immediately anterior thereof in L. strumosus (I). The pronotal disc is very glossy with almost no microsculpture, lateral margins smoothly curved in their entire length, with widest point at ¼ – ⅓ of the marginal length from the anterior corners in L. umbrosus sp. nov. (J). Transverse carinae of the anterior part of tergite II – V unconnected in their entire length in L. strumosus (K), while they are connected in the centre of the tergite by a broad septum (marked with arrows), occasionally two or more broad septa, in L. umbrosus sp. nov. (L).	2026-03-30	Kjærby, Hjalte Sebastian;Bek Craig, Sean Birk;Thomsen, Philip Francis;Hansen, Aslak Kappel		Zenodo	biologists	Kjærby, Hjalte Sebastian;Bek Craig, Sean Birk;Thomsen, Philip Francis;Hansen, Aslak Kappel			
E02A9F0DC67654DE84EEFF46F64562B3.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1573701	https://doi.org/10.3897/zookeys.1275.182781.figure7	Figure 7. Typical resting posture of Lomechusoides. A. Lomechusoides strumosus. With Formica sanguinea, Nørlund Plantage, Denmark, 24 March 2025; B. Lomechusoides umbrosus sp. nov. (holotype). With F. polyctena, Hammarskog, Sweden, 20 September 2023. The two species are easily identified from photos of live animals by the stark difference in pronotum shape and glossiness, head colour, and abdomen colour.	Figure 7. Typical resting posture of Lomechusoides. A. Lomechusoides strumosus. With Formica sanguinea, Nørlund Plantage, Denmark, 24 March 2025; B. Lomechusoides umbrosus sp. nov. (holotype). With F. polyctena, Hammarskog, Sweden, 20 September 2023. The two species are easily identified from photos of live animals by the stark difference in pronotum shape and glossiness, head colour, and abdomen colour.	2026-03-30	Kjærby, Hjalte Sebastian;Bek Craig, Sean Birk;Thomsen, Philip Francis;Hansen, Aslak Kappel		Zenodo	biologists	Kjærby, Hjalte Sebastian;Bek Craig, Sean Birk;Thomsen, Philip Francis;Hansen, Aslak Kappel			
E02A9F0DC67654DE84EEFF46F64562B3.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1573698	https://doi.org/10.3897/zookeys.1275.182781.figure4	Figure 4. Genitals of L. strumosus from Jutland: Dorsal (A) and lateral (C) view of aedeagus, lateral view of spermatheca (E) and L. umbrosus sp. nov. from Uppsala: Dorsal (B) and lateral (D) view of aedeagus, with arrow indicating subapical expansion. Lateral view of spermatheca (F).	Figure 4. Genitals of L. strumosus from Jutland: Dorsal (A) and lateral (C) view of aedeagus, lateral view of spermatheca (E) and L. umbrosus sp. nov. from Uppsala: Dorsal (B) and lateral (D) view of aedeagus, with arrow indicating subapical expansion. Lateral view of spermatheca (F).	2026-03-30	Kjærby, Hjalte Sebastian;Bek Craig, Sean Birk;Thomsen, Philip Francis;Hansen, Aslak Kappel		Zenodo	biologists	Kjærby, Hjalte Sebastian;Bek Craig, Sean Birk;Thomsen, Philip Francis;Hansen, Aslak Kappel			
E02A9F0DC67654DE84EEFF46F64562B3.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1573697	https://doi.org/10.3897/zookeys.1275.182781.figure3	Figure 3. The two other Nordic Lomechusoides species L. inflatus (A) and L. wellenii (B), and the morphologically most similar species to L. umbrosus sp. nov., L. primoricus (C), and L. zerchei (D) from East Siberia.	Figure 3. The two other Nordic Lomechusoides species L. inflatus (A) and L. wellenii (B), and the morphologically most similar species to L. umbrosus sp. nov., L. primoricus (C), and L. zerchei (D) from East Siberia.	2026-03-30	Kjærby, Hjalte Sebastian;Bek Craig, Sean Birk;Thomsen, Philip Francis;Hansen, Aslak Kappel		Zenodo	biologists	Kjærby, Hjalte Sebastian;Bek Craig, Sean Birk;Thomsen, Philip Francis;Hansen, Aslak Kappel			
E02A9F0DC67654DE84EEFF46F64562B3.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1573699	https://doi.org/10.3897/zookeys.1275.182781.figure5	Figure 5. Distribution of A. Lomechusoides umbrosus sp. nov. (examined material) and Formica polyctena (GBIF); B. Lomechusoides strumosus (examined material) and F. sanguinea (GBIF).	Figure 5. Distribution of A. Lomechusoides umbrosus sp. nov. (examined material) and Formica polyctena (GBIF); B. Lomechusoides strumosus (examined material) and F. sanguinea (GBIF).	2026-03-30	Kjærby, Hjalte Sebastian;Bek Craig, Sean Birk;Thomsen, Philip Francis;Hansen, Aslak Kappel		Zenodo	biologists	Kjærby, Hjalte Sebastian;Bek Craig, Sean Birk;Thomsen, Philip Francis;Hansen, Aslak Kappel			
E02A9F0DC67654DE84EEFF46F64562B3.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://binary.pensoft.net/fig/1573700	https://doi.org/10.3897/zookeys.1275.182781.figure6	Figure 6. Ecological difference between Lomechusoides umbrosus sp. nov. and L. strumosus. A. Formica polyctena nest in a pine forest in Hammarskog, Uppsala, Sweden, where the male holotype of L. umbrosus sp. nov. was collected; B, D. Lomechusoides umbrosus sp. nov. females with host F. polyctena workers at the type locality; C. Lomechusoides umbrosus sp. nov. male sifted from a F. polyctena nest in the Ural Mountains; E. Formica sanguinea nest on heathland at the edge of a spruce plantation in Tingskov, North Jutland, Denmark heavily infested with L. strumosus; F. Lomechusoides strumosus female in a nest of F. sanguinea in Kompedal Plantage, Central Jutland, Denmark.	Figure 6. Ecological difference between Lomechusoides umbrosus sp. nov. and L. strumosus. A. Formica polyctena nest in a pine forest in Hammarskog, Uppsala, Sweden, where the male holotype of L. umbrosus sp. nov. was collected; B, D. Lomechusoides umbrosus sp. nov. females with host F. polyctena workers at the type locality; C. Lomechusoides umbrosus sp. nov. male sifted from a F. polyctena nest in the Ural Mountains; E. Formica sanguinea nest on heathland at the edge of a spruce plantation in Tingskov, North Jutland, Denmark heavily infested with L. strumosus; F. Lomechusoides strumosus female in a nest of F. sanguinea in Kompedal Plantage, Central Jutland, Denmark.	2026-03-30	Kjærby, Hjalte Sebastian;Bek Craig, Sean Birk;Thomsen, Philip Francis;Hansen, Aslak Kappel		Zenodo	biologists	Kjærby, Hjalte Sebastian;Bek Craig, Sean Birk;Thomsen, Philip Francis;Hansen, Aslak Kappel			
