title: The first species of Thelastoma Leidy, 1849 (Nematoda: Thelastomatidae) parasitising the scorpion Euscorpius italicus (Chactidae: Scorpionidea).
abstract: A new species, Thelastoma euscorpii, (Thelastomatidae: Oxyuroidea) is described from Euscorpius italicus (Chactidae) on Pag Island (Kvarner Islands), Croatia. The new taxon differs from all other species of Thelastoma in having a cuticle with fine transverse striae. The excretory pore of the female specimens is located in a prebulbar position, the tail is short and subfiliform (5.5-9.3% of the total body length), and the eggs are small (47-52 x 24-29 microm). The males have a short oesophagus and no spicules. This is the first nematode species found in scorpions (Scorpionidea).
authors.affiliation: Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, 603 65 Brno, Czech Republic.
authors.forename: Vlastimil
authors.initials: V
authors.lastname: Barus
authors.forename: Bozena
authors.initials: B
authors.lastname: Koubková
mesh_terms: D000818:Animals; D017523:Croatia; D005260:Female; D008297:Male; D008859:Microscopy, Polarization; D008953:Models, Anatomic; D009348:Nematoda / Q000033:anatomy & histology / Q000145:classification* / Q000302:isolation & purification; D012605:Scorpions / Q000469:parasitology*