Chimarra ulmeri Kimmins, 1962

Cartwright, David, 2020, A review of the New Guinea species of Chimarra Stephens (Trichoptera: Philopotamidae), Memoirs of Museum Victoria 79, pp. 1-49 : 30

Chimarra ulmeri Kimmins, 1962

Figure 90

Chimarra ulmeri Kimmins, 1962: 114 ; figs 15, 16.—Neboiss, 1986: 106.

Type material not seen. Holotype. Male (dried, pinned specimen), PNG, Kokoda, 1200 ft (366 m), June–July 1933, L.E. Cheeseman ( BMNH).

Material examined. PNG. 1 male (dried, pinned specimen CT-401 partly figured), Oro District, Kokoda , 400 m, about 8° 53'S, 147° 45'E, 15–20 November 1965, J. and M. Sedlacek ( BPBM) ; 3 males (CT-335), (Morobe Province) Bullolo, Taun Creek , about 7° 10' S, 146° 38' E, UV light, 4 June 1986, A. Wells ( NMV) .

Diagnosis. The males of C. ulmeri can be separated from all other New Guinea species, including C. bicornis , by the sclerotised branches of the lateral lobes of segment X, which are both hooked dorsally ( Kimmins, 1962: figs 16A, 16B) or posterodorsally, in lateral view.

Description. General body colour and wings fawn or light brownish. Wings ( Kimmins, 1962: fig. 15); similar to those of C. ukarumpana (fig. 7). Length of forewing: male 4.7–5.7 mm. Forewing with forks 1, 2, 3 and 5 present, Rs moderately sinuous or curved, moderately thickened basad of discoidal cell ( Kimmins, 1962: fig. 15); hind wing with forks 1, 2, 3 and 5 present.

Male genitalia. (Revised after Kimmins, 1962). Segment IX anterior margin in lateral view, anteroventrally rounded (fig. 90; Kimmins, 1962: fig. 16A), ventral process in lateral view short, sub-triangular, basal to distal margin of segment IX, length about 0.6–0.7 width, preanal appendages, in lateral view, rounded (fig. 90; Kimmins, 1962: fig. 16A), in dorsal view, appear rod-like ( Kimmins, 1962: fig. 16B). Segment X lateral lobes branched, with sensilla not discerned, in lateral view dorsal lateral lobe sclerotised, slender and slightly (fig. 90) or strongly upturned distally ( Kimmins, 1962: fig. 16A), slightly out turned distally in dorsal view ( Kimmins, 1962: fig. 16B), ventral lateral lobe slightly laterally compressed ( Kimmins, 1962: figs 16A, B), in lateral view upturned (fig. 90), in dorsal view, slender and diverging posteriorly ( Kimmins, 1962: fig. 16B). Phallus with two slender spines included subapically and a larger partly emergent spine from the apex of the phallobase. Inferior appendages broadest in basal half, tapered distally, apices acute and directed slightly posteromesally (fig. 90; Kimmins, 1962: figs 16A, C), in lateral view angled about 30–45° to horizontal, length about 2.5–2.8 times width, sinusoidal, dorsal margin slightly convex, ventral margin concave in distal half (fig. 90; Kimmins, 1962: fig. 16A), in ventral view lateral margin strongly convex, mesal margin irregularly concave ( Kimmins, 1962: fig. 16C).

Female. Unknown (3 females collected with the holotype are referred with some doubt to this species, but undescribed ( Kimmins, 1962: p. 115).

Remarks. Chimarra ulmeri is known from five males (and three females?) from three localities in the Oro and Morobe Districts of eastern PNG. A new figure has been drawn to allow direct comparisons and to accompany the description that is revised in light of variations in Chimarra genitalic structures fromKimmins’ (1962) original description. The new specimens differ slightly from the type specimen in the shape of the branched lateral lobes of segment X, but I feel are still best placed with C. ulmeri .

Figures

Figures 86–93. Chimarra spp.; 86, Chimarra biramosa Kimmins, male, genitalia, lateral. 87–89, Chimarra kewabi sp. nov., male, holotype, genitalia; 87, lateral; 88, ventral, 89, dorsal. 90: Chimarra ulmeri Kimmins, male, genitalia, lateral. 91–93, Chimarra bicornis sp. nov., male, holotype, genitalia; 91, lateral; 92, ventral; 93, dorsal.