Ectinorus (Ichyonus) angularis Smit and Rosicky

Hastriter, Michael W. & Sage, Richard D., 2011, Description of a new species of Ectinorus (E. spiculatus) (Siphonaptera, Rhopalopsyllidae) from Argentina and a review of the subgenus Ichyonus Smit, 1987, ZooKeys 124, pp. 1-18 : 3

Ectinorus (Ichyonus) angularis Smit and Rosicky Figs 1, 4, and 7

Ectinorus onychius angularis Smit and Rosicky 1972: 366; Smit 1987: 122; Beaucournu and Gallardo 1992: 100; Alarcón 2000: 13. stat. n.

Material Examined.

Chile, [Magallanes Region]: Estancia Pudeto, W of Lago Sarmiento, [51°05'S, 73°00'W, ex Akodon sp.], 18 II 1969, M. Rozehnal (1 pair of paratypes) (BMNH).

Diagnosis.

Male distinguished from other species of Ichyonus by large lobular crochet that has a heavily sclerotized ventral margin and convoluted folds on the ventro-caudal margin (Fig. 4). The ventro-caudal hook of the telomere is also much longer and robust, its apex hooking upward well beyond middle of telomere (Fig. 1). This extends less than half the length of the telomere in other species. The upper portion of the acetabulum far below middle of anterior margin of telomere (Fig. 1). The single known female specimen may be distinguished from females of Ectinorus onychius by a much shorter anal stylet (cfFigs 7 and 8).

Remarks.

Known only from a single collection in the extreme southern limits of Chile; little can be said of its host preferences. The type locality of Ectinorus angularis occurs at the lowest elevation of the three species of Ichyonus at ~40m. The female is indistinguishable from females of Ectinorus onychius with the exception of the much shorter anal stylet. The anal stylet on both sides of the single specimen examined appears the same. Two additional females (paratypes) reportedly exist in the Czechoslovak Academy of Sciences, Prague, but they could not be obtained for examination. Smit and Rosicky (1972) examined all three of the known females at the time of their description. Although they did not state that the anal stylet was similarly short in all three specimens, Smit (1987:124, fig. 263) subsequently illustrated the anal stylet of the allotype. Additional collections will refute or substantiate the value of this character.