Notes on some toad bugs from China (Hemiptera, Heteroptera, Gelastocoridae)

Area of Science:

• Entomology
• Biodiversity studies
• Taxonomy of Gelastocoridae

Background:

• The genus Nerthra comprises three species found in China.
• Gelastocoridae (toad bugs) are a family of semi-aquatic insects.
• Previous taxonomic work on Nerthra in China may be incomplete.

Purpose of the Study:

• To provide an updated review of the three Nerthra species in China.
• To document the morphology of Nerthra asiatica and Nerthra indica, including male and female reproductive structures.
• To formally describe and review the male of Nerthra asiatica for the first time.

Main Methods:

• Morphological examination of collected specimens.
• High-resolution photography of dorsal habitus.
• Detailed illustrations of male genitalic structures.
• Illustrations of the ventral aspect of female posterior abdominal segments.

Main Results:

• Photographs of dorsal habitus for Nerthra asiatica and Nerthra indica are presented.
• Illustrations of male genitalic structures for both species are provided.
• The male of Nerthra asiatica is recorded and reviewed for the first time, contributing new data to its taxonomy.

Conclusions:

• This review enhances the understanding of Nerthra species diversity in China.
• The detailed morphological documentation aids in species identification and future taxonomic research.
• The first-time review of male Nerthra asiatica fills a gap in the knowledge of this species.