Rhyacobates constrictus Tran & Nguyen, 2016

Leng, Zhaoqi, Tran, Anh Duc & Ye, Zhen, 2023, Taxonomic review of Rhyacobates Esaki, 1923, with descriptions of three new species (Hemiptera: Heteroptera: Gerridae), European Journal of Taxonomy 893 (1), pp. 1-73 : 42

publication ID	https://doi.org/ 10.5852/ejt.2023.893.2285
publication LSID	lsid:zoobank.org:pub:D9DA4879-BC1D-4947-96E8-7D574DE334BA
DOI	https://doi.org/10.5281/zenodo.10063663
persistent identifier	https://treatment.plazi.org/id/045E878D-FFF5-2912-3A1C-FD4F74380833
treatment provided by	Plazi
scientific name	Rhyacobates constrictus Tran & Nguyen, 2016
status

Treatment

Rhyacobates constrictus Tran & Nguyen, 2016 View in CoL

Figs 3I View Fig , 5H View Fig , 6H View Fig , 26 View Fig

Rhyacobates constrictus Tran & Nguyen, 2016: 508–512 View in CoL , figs 24–39 (original description).

Diagnosis

Body length of apterous females 8.70–9.40, of apterous males 6.90–7.10. Color ( Figs 3I View Fig , 5H View Fig , 26 View Fig ): dorsum of head mainly yellow, with a median, longitudinal brown marking on anterior three-quarters; pronotum with a median yellow marking (in males, median marking narrower); mesonotum and metanotum entirely black, without yellow markings. Female: abdomen relatively short; ventral length of pregenital abdomen about 0.4 times body length ( Figs 3I View Fig , 26B View Fig ); abdominal apex curved dorsad; mediotergite I swollen; connexivum of segments I–V narrow, of segment VI wider; abdominal segment VII tapering towards apex ( Figs 5H View Fig , 26A View Fig ); laterosternites of connexivum VII expanded dorsad and curved mesad; posterior margin of sternum VII with narrow median process. Male: middle trochanter without spines; small spines on middle femur scattered, not arranged in distinct row; length of middle tibia ca 1.5 times length of hind tibia; abdomen relatively short; pygophore simple, with rounded apical margin; proctiger with broadly angular lobe on each lateral side ( Fig. 6H View Fig ); paramere curved at basal fourth, strongly thickened at middle part, then tapering towards apex, distal part with scattered short setae.

Material examined

Type specimens ( Fig. 26 View Fig )

See Tran & Nguyen (2016).

Distribution

Vietnam: Phú Thọ ( Tran & Nguyen 2016).

Comparative notes

Tran & Nguyen (2016: 512) provided comparative notes between R. constrictus , R. abdominalis and R. recurvus , which all have a median process on the posterior margin of mediosternite VII of the female. Also see further comparative notes under R. bui sp. nov. and R. turgidus sp. nov.