Liyang stonefly (Kamimuria liyangensis) from Jiangsu, China, which has penis similar to Kamimuria hainana

Dlium Liyang City stonefly (Kamimuria liyangensis) from Jiangsu, China, which has penis similar to Kamimuria hainana

NEWS - Liyang stonefly (Kamimuria liyangensis sp. nov.) from Jiangsu Province is located in the southeastern coast of China which has no mountains on the plateau with only a few hilly areas mostly distributed in the southern part has a penis similar to Kamimuria hainana Li, Wang & Yu 2012.

Kamimuria Klapálek 1907 is the most species-rich genus in the subfamily Perlinae with about 93 species known worldwide, distributed in the Oriental and Palaearctic Realms, mainly in China. Over the past 30 years, the number of Kamimuria species recorded in China has increased dramatically to 60 species.

Jiangsu Province is located in the southeastern coast of China and has no mountains on the plateau, with only a few hilly areas mostly distributed in its southern region. Recently researchers examined Kamimuria materials from Jiangsu and described a new species.

Male K. liyangensis has a generally brown to dark brown colouration (Due to being preserved in alcohol, the colours in the specimens appear faded in the photograph). Head pale yellow with black marking covering ocellar area.

Antennae and palpi dark brown. Pronotum dark brown with darker rugosities, anterior margin and stripes along median suture darker. Legs yellow brown with dark knees. Wings membranous grey, veins brown.

Tergum 1–8 unmodified. Tergum 9 centre with sensilla basiconica. Hemitergal lobe slender, hook-like, apex slightly re-curved and nearly reaching the posterior margin of tergum 9.

Penis membranous, with a ring-shaped group of large spines at the tip, interrupted by a spongy membranous projection in the middle. The base of the penis on the dorsal side is densely covered with small dot-like spines.

This species is known only from the type locality, Liyang City, Jiangsu Province. The penis of the new species is similar to that of K. hainana. Both species have a spine-free membranous area at the apex of the dorsal side of the endophallus, while the base is densely covered with small spines. In addition, the ventral side of the endophallus has a spine-free membranous region.

However, K. hainana has a patch of basal spinules divided by a funnel-shaped region on the dorsal surface, which terminates subapically. The spines on both lobes form a heart-shaped ring when viewed from the ventral side.

In K. liyangensis, the dorsal side of the base of the penis is densely covered with small, point-like spines. In ventral view, there is a cluster of large, ring-shaped spines at the tip, interrupted in the middle by a spongy, membranous prominence.

Original research

Zeng L-L, Huo Q-B, Du Y-Z (2024). A new species of the genus Kamimuria (Plecoptera, Perlidae) from Jiangsu, China with re-description of K. microda Du, 2002. Biodiversity Data Journal 12: e137424, DOI:10.3897/BDJ.12.e137424

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