Phanoperla pumilio (Klapálek)

Stark, Bill P. & Sivec, Ignac, 2007, Studies Of Indonesian Perlidae (Plecoptera), With Descriptions Of Three New Species, Illiesia 3 (7), pp. 53-64 : 59

Phanoperla pumilio (Klapálek)

( Figs. 18‐21 )

Neoperla pumilio Klapálek, 1921:320 . Lectotype ♂, Sebroang, Borneo

Phanoperla pumilio: Zwick, 1982d:111 . Redescription

Material examined. Indonesia: East Kalimantan, Long Tua, Bahau River , 3° 10’ N, 115° 47’ E, 440 m, 5‐ 9 April 1994, IIS 940526, B. Hubley, D.C. Darling, 1 ♂, 5 ♀ ( MZB, ROM) .

Remarks. Zwick (1982d) redescribed this species but eggs were unavailable at that time. Eggs from our specimens are ca. 0.35 mm long and ca. 0.20 mm wide in the equatorial zone. The collar is short, wide and the narrow rim is slightly flanged ( Figs. 18‐19 ); collar width ca. 0.07 mm. Anchor mushroom shaped with marginal double row of globular bodies on small lobes ( Fig. 20 ). Chorion with obscure, narrow striae extending from collar rim, ca. 12 visible in lateral aspect; area immediately adjacent to collar impunctate, but punctations become progressively more distinct distal to collar. Equatorial zone with slightly larger punctations than those on either side; lid completely punctate but most pits outline follicle cell impression walls and floors of most cells have few pits ( Fig. 21 ). These eggs are similar to those of P.flaveola and P. flabellare (described above). They differ from the former in having more prominent striae, less conspicuous punctations on the lid and the equatorial zone has larger rather than smaller pits than the adjacent chorionic areas; they differ from eggs of the latter species in having more and slightly more prominent striae and in having much less conspicuous punctuation on the lid.

Figures

Figs. 18‐21. Phanoperla pumilio eggs. 18. Entire egg, 19. Collar end, 20. Intact collar, 21. Lid.