Eurystylops ogloblini, Benda & Straka, 2025

Eurystylops ogloblini sp. nov.

( Figs 1–5 View Fig View Fig View Fig View Fig View Fig )

Type locality. Czech Republic:Southern Moravia, Horní Bojanovice env.

Type material. HOLOTYPE: ♀ ( NMPC), cephalothorax on triangular mounting card: “ CZECH REPUBLIC, Mor. / mer., Horní Bojanovice / 222 m, pan traps / 48.942386, 16.808153 / M. Štrobl lgt., 03.07.2022 ”. Host: Rophites quinquespinosus GoogleMaps . PARATYPES: AZERBAIJAN: 1 ♀ ( JSPC), Altiaghach env., Altiaghaj NP, 11.vi.2012, swept, M. Volf lgt., host: Rophites clypealis . GREECE: 1 ♀ ( JSPC), Thessalia prov., Ossá Mt., 8.viii.2010, swept, J. Halada lgt., host: Rophites hartmanni . SLOVAKIA: 1 ♀ ( MMBC), Štúrovo, Svodín, 27.vii.1961, swept, E. Staněk lgt., host: R. quinquespinosus ; 2 ♀♀ ( NMPC), Fiľakovo env., 13.vii.1938, swept, V. Zavadil lgt., host: R. quinquespinosus . TURKEY: 12 ♀♀ ( NMPC), Kahramanmaraş prov., Budaklı env., 1934 m, 37.655694, 37.041111, 5.vii.2011, swept, J. Straka lgt., host: Rophites clypealis .

Other material. CZECH REPUBLIC: BOHEMIA: 1 EMP ( NMPC), Jílové u Prahy env., 16.vii.1906, Holík lgt., host: R. quinquespinosus .

Diagnosis of female cephalothorax. Differing from Eurystylops oenipontana mainly in size and shape of cephalothorax. Size of cephalothorax larger in E. ogloblini of cephalothorax ( holotype); C – detail of ventral side of cephalothorax ( paratype); D – detail of dorsal side of cephalothorax ( paratype).Abbreviations: cll – clypeal lobe, dlf – dorsal labral field of labral area, mp – membranous patch of cuticle, pp – pigmented papillae, sbhp – segmental border between head and prothorax, sbmm – segmental border between mesothorax and metathorax, sbpm – segmental border between prothorax and mesothorax.

(length 0.92–0.96 mm, width 0.72–0.80 mm) in comparison with E. oenipontana (length 0.50–0.58 mm, width 0.64–0.73 mm). Lateral part of abdominal segment I below spiracles rounded, not forming spiracular corner as in E. oenipontana (sc, Fig. 7A View Fig ). Head of E. ogloblini shorter than cephalothorax: length proportion of head/cephalothorax 0.30 but 0.36–0.40 in E. oenipontana . Cuticle of prothorax (prosternum) uniformly pale orange in E. ogloblini , completely reticulate, posteriorly with transversal group of pigmented papillae (pp, Fig. 3A View Fig ); E. oenipontana in contrast only rarely with thoracic papillae. Very variable membranous patches of cuticle present on mesosternum and anterior part of metasternum in E. ogloblini (mp, Fig. 3A View Fig ), but completely absent in E. oenipontana .

Features visible on SEM images: Clypeal region of E. ogloblini not well delimited from labral area (sbcl, Fig. 4C View Fig ), and labral area distinctly constricting clypeal area or even overlapping it and protruding from head capsule (dlf; Figs 3A, C View Fig ). In contrast, clypeal region well delimited from labral area in E. oenipontana (sbcl, Fig. 8C View Fig ), and labral area well visible in ventral view, not constricting clypeal area. Mandibular tooth small in E. ogloblini (mdt, Fig. 5A View Fig ), but conspicuously large in E. oenipontana (mdt, Fig. 8C View Fig ). Description of female cephalothorax. Shape and colouration. Cephalothorax ( holotype) length 0.72 mm, width 0.92 mm. Shape slightly variable but always wider than long, length 0.92–0.96 mm, width 0.72–0.80 mm. Flattened in cross-section, semi-elliptic. Anterior head margin not protruding from cephalothorax capsule. Thorax distinctly widening posteriorly. Pro-mesothoracic and meso-metathoracic segmental border very slightly constricted laterally, indistinct in some specimens (sbpm, sbmm; Fig. 3C View Fig ). Colouration from pale yellow to dark brown. Cephalothorax with conspicuous colour pattern with abdominal part of cephalothorax darker than anterior part.

Head capsule. Length of head about one third of cephalothorax. Length proportion of head/cephalothorax 0.30 including lateral cephalic extension. Width of birth opening 0.46 (0.46–0.56) mm. Head colouration predominantly pale, without dark colouration. Clypeal region not well delimited from labral area (sbcl, Fig. 4C View Fig ), labral area significantly constricting clypeal area ( holotype), in some specimens even overlapping clypeal area and protruding from head capsule (dlf; Figs 3A, C View Fig ). Apical margin of clypeal area blunt, not forming protruding clypeal lobe (cll, Fig. 3A View Fig ). Clypeal surface smooth, with distinctly visible sensilla present and more or less evenly scattered (cls, Fig. 4C View Fig ). Cuticle of frontal region slightly wrinkled, reticulated (fr, Fig. 4D View Fig ). Segmental border between head and prothorax indicated by distinct suture on dorsal side (sbhp; Figs 3D View Fig , 4D View Fig ). Head and prothorax distinctly separated by birth opening ventromedially, and laterally by indistinct suture as in Stylops ( LÖWE et al. 2016) .

Supraantennal sensillary field slightly wrinkled, reticulated, with distinctly recognisable sensilla. Not delimited by furrow medially, border not recognisable. Clypeal area not clearly delimited from supraantennal sensillary field, clypeal sensilla hardly distinguishable from sensilla of supraantennal sensillary field (ssf, cl; Fig. 4D View Fig ).

Antenna. Vestiges of antennae absent.

Labrum. Ventral field elliptic, not protruding. Dorsal field elongated, slightly arcuate, protuberant, ~ 5–6× (5× in holotype) wider than long in midline (dlf, Fig. 4C View Fig ). Border between dorsal and ventral labral field not well delimited. Setae of dorsal field present or absent (in holotype). Dorsal field overlapping clypeal area from ventral side in some specimens.

Mandible anteromedially directed at angle of 30–35° (35° in holotype) and slightly protruding from mandibular capsule (md, Fig. 4C View Fig ). Mandibular bulge more or less distinctly raised, with several indistinct sensilla. Cuticle wrinkled laterally, completely smooth medially ( Fig. 5A View Fig ). Tooth small, narrow, pointed apically (mdt, Fig. 5A View Fig ).

Maxilla completely absent and fused with labial area, forming maxillolabial complex (mxlc, Fig. 2C View Fig ). Surface of maxillolabial complex completely smooth. Maxillary base fused, part of maxillolabial complex. Vestige of maxillary palp absent. Submaxillary groove present, produced posterolaterally, curved along birth opening (smxg, Fig. 4C View Fig ).

Labium. Labial area indistinct, only delimited anteriorly by mouth opening and posteriorly by birth opening. Laterally completely fused with maxillae, without visible borders. Surface completely smooth.

Mouth opening. medially straight, laterally arcuate, area around mouth opening slightly lighter in colour (os, Fig. 4C View Fig ).

Thorax. Pro-mesothoracic and meso-metathoracic borders indistinct on ventral side, borders laterally more visible (sbpm, sbmm; Fig. 3C View Fig ), medially separated by indistinct impressions (sbpm, sbmm; Fig. 4A View Fig ). Distinct change in cuticular sculpture visible on pro-mesothoracic borders, but meso-metathoracic borders nearly invisible on SEM micrographs and colour photo (pst, mst, mtst; Fig. 4A View Fig ). On dorsal side, pro-mesothoracic and meso-metathoracic borders indistinct, almost unrecognisable. Border between metathorax and abdomen indicated by change in cuticular surface structure (asI, Fig. 4A View Fig ). Cuticle of prothorax (prosternum) uniformly pale orange, completely reticulate, posteriorly with transverse group of more strongly pigmented papillae. Pigmented papillae well visible in holotype (pp, Fig. 3A View Fig ), in some specimen indistinctly visible ( Fig. 3C View Fig ). Anterior edge of prosternal extension not distinctly translucent. In ventral view, mesosternum reticulated, lateral parts also wrinkled. Metasternum completely reticulated, surface extending laterally, almost reaching abdominal spiracles. Membranous patches of cuticle presented on mesosternum and anterior part of metasternum, variable in shape, distinct in holotype (mp, Fig. 3A View Fig ) but in some specimen not well visible ( Fig. 3C View Fig ). Pigmented papillae present posteriorly on metasternum. Prothorax, mesothorax and metathorax almost completely fused dorsally, with indistinct borders. Surface smooth or slightly wrinkled, translucent in comparison with head capsule on dorsal side ( Figs 3B, D View Fig ).

Abdominal segment I and spiracles. Sclerotised abdominal part of abdominal segment I smooth dorsally, slightly wrinkled on ventral side. Colouration varies from dark brown, contrasting to pale metathorax (in holotype), to pale orange in some other specimens. Borders between smooth abdominal segment I and reticulated or wrinkled metathorax well recognisable on ventral side, in dorsal view distinct laterally but indistinct medially. Spiracles located on posterior half of cephalothorax, not elevated, with anterolateral orientation. Cuticular spines present on lateral region of abdominal segment I (cus, Fig. 5B View Fig ). Lateral part of abdominal segment I below spiracles rounded, not forming spiracular corner.

Male and primary larvae. Unknown.

Etymology. Named in honour of Alexander A. Ogloblin, an expert of Strepsiptera and Hymenoptera , who worked several years in the National Museum in Prague and significantly contributed to the development of the collections of our Department of Entomology.

Hosts. Rophites clypealis Schwammberger, 1976 ; R. hartmanni Friese, 1902 and R. quinquespinosus Spinola, 1808 . Phylogenetic relationships. Related to Eurystylops oenipontana Hofeneder, 1949 (Benda & Straka unpubl.)

Distribution. Western Palaearctic ( Fig. 10 View Fig ).

Note. A host specimen with an empty male puparium (EMP) is the only evidence of the existence of a male in the genus Eurystylops . This specimen was studied by A. A. Ogloblin and was labelled as “? Rophitostylops n. gen. ” ( Fig. 2E View Fig ). We also examined the collection of V. Székessy deposited in HNHM. Although the records of stylopised Rophites quinquespinosus and R. hartmanni were published by SZḖKESSY (1959), the material is missing in the collection. There is a note in his list of species in the collection that the material is lost and could thus not be described (KINZELBACH 1978).