Syrioiulus astrabadensis (Lohmander, 1932)

Vagalinski, Boyan, 2020, A new species of Syrioiulus Verhoeff, 1914 from Iran, with remarks on the taxonomy of the genus (Diplopoda: Julida: Julidae), Revue suisse de Zoologie 127 (1), pp. 83-94 : 88-89

Syrioiulus astrabadensis (Lohmander, 1932)

Fig. 17

Amblyiulus astrabadensis Lohmander, 1932a: 30-33 , figs 30- 32.

Material: GNM; 2 (supposed) female syntypes of “ Amblyiulus astrabadensis n. sp. ”; Persien: Astrabad (nr. 28); 02.May.1905, E. Filippowitsch. – GNM; 2 slide preparations of (supposed) female syntypes: Amblyiul. nr. 28, I: vulvae, legs, and mouthparts, and Amblyiul. nr. 28, II: mouthparts and vulvae. – GNM; 2 slide preparations of (supposed) male syntypes: Amblyiul. nr. 28: gonopods, mouthparts, legs, antennae, edges of pleurotergum 7, and Amblyiul. nr. 28, II: labrum, mandible, legs.

Type locality: Iran, Golestan province, Gorgan (formerly Esterabad).

Taxonomic notes: Promere virtually indistinguishable from that of S. lohmanderi sp. nov. Caudomesal lamella (cl) directed meso-anteriad rather than completely mesad. Mesomeral process (m) considerably shorter than solenomere (s), without strongly protruding apical corners; solenomere apically forming more shallow concavity in comparison with S. lohmanderi sp. nov., and with an anterior process directed mostly distad rather than bent caudad. A very fine central filiform process (ff), similar to that of S. lohmanderi sp. nov., visible.

Remarks: Despite the conspicuous similarities between the gonopods of S. astrabadensis and S. lohmanderi sp. nov., the two species can be rather easily distinguished by overall appearance: S. astrabadensis is less than 25 mm in length and entirely pallid, whereas S. lohmanderi sp. nov. is 28-29 mm long and has a brownish pigmentation. Likewise, the very similar gonopod conformation in S. persicus is in a way countervailed by the setose metazonal hind margins in this species; both S. astrabadensis and S. lohmanderi sp. nov. lack metazonal setae. Examples of species with (almost) completely identical gonopods but otherwise obvious differences in size and colouration are not uncommon in Pachyiulini (e.g. Frederiksen et al., 2012; Golovatch, 2018).

Figures

Fig. 17. Syrioiulus astrabadensis (Lohmander, 1932a), paratype male, in GNM, distal parts of right opisthomere in mesal view. Abbreviations: cl = caudomesal lamella; ff = central filiform process; m = mesomeral process; s = solenomere. Scale bar: 0.05 mm.