Phanoperla uchidai Sivec and Stark, 2010

Zeng, Liang-Liang, Huo, Qing-Bo & Du, Yu-Zhou, 2025, A new species and a new record of Phanoperla (Plecoptera: Perlidae) from Yunnan, China, Zootaxa 5637 (1), pp. 185-189 : 187-189

Phanoperla uchidai Sivec and Stark, 2010

Fig. 3–4

Phanoperla uchidai Sivec and Stark, 2010: 106 . Wang et al., 2024:577.

Supplementary description. Biocellate structure features large ocelli nearly touching ( Fig. 3 ). Occiput is dusky behind the ocelli, and the median suture line is dark (Due to prolonged storage in alcohol, its color has changed). Frons is also dusky but lacks a distinct dark pattern. The pronotum is pale with darker rugosities and has a rectangular shape, narrowing toward the back. The front width is twice as long as the rear, with sharp angles and a rugose surface. Legs are yellow-brown, with brown coloration on the proximal part of the tarsus. The wings are hyaline, with pale brown veins.

Male. Tergum 9 with lateral patches of sensilla basiconica set on low mounds and small median patch set in depression between lateral patches. The inner hemiterga also have a finger-like shape with sensilla basiconica, while the narrow processes of the hemitergite extend to the middle of tergum 9 and feature sharp tips ( Fig. 3 ).

The penis is membranous, tubular in shape, and slightly “S” shaped. The sclerite of the penis tube broadly covers the dorsal surface from the medium length to near the apex, extending around the dorsolateral margins. The endophallus features lateral patches of spines near the base and a large apical patch. Near the central part of the ventral surface, there is a small patch of spines, and the proximal end of the endophallus is densely covered with many small black spines, with the largest spines forming a partial ring near the midpoint of the patch ( Fig. 4 ).

Female. Forewing length 9–9.5 mm. Subgenital plate slightly produced and deeply notched, dividing plate into a pair of small lobes. Lobes of plate bear several long thin setae and a few thick setae occur anterior to notch ( Sivec and Stark, 2010).

Material examined. 1 male ( ICYZU), Manghekuan Village , Jinghong City, Xishuangbanna Dai Autonomous Prefecture, Yunnan Province, China, 21.9009°N, 100.9051°E, 1982.4.23, leg. Jingruo Zhou, Sumei Wang.

Distribution. China (Yunnan); Laos; Thailand.

Remarks. We collected this species in Yunnan Province, located in the southwest of China, bordering Myanmar to the west and adjacent to Laos and Vietnam to the south, not far from Thailand. This species was originally described from Thailand by Sivec and Stark (2010). The male's head pattern, dorsal terminalia, and spine lines on the penis closely match the illustrations provided by Sivec and Stark (2010). However, some diagnostic features in the original drawings were unclear. Here, we provide high-resolution, color images to facilitate accurate morphological identification of this species in future studies.

Figures

FIGURE 3. Phanoperla uchidai, male. A: adult of male, dorsal view; B: head and pronotum, dorsal view; C: abdominal terminalia, dorsal view.

FIGURE 4. Phanoperla uchidai, male, everted penis. A: lateral view. B: ventral view. C: dorsal view.