The Gyrinidae (Coleoptera) fauna of Thailand: Key to tribes and genera, with new records and keys to species of Dineutini and Gyrinini Author Suksai, Benjamart 0000-0002-2472-6100 benjamartbenjamart@gmail.com Author Gustafson, Grey T. Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, Kansas 66045, USA. & Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, 86011, USA. Author Sites, Robert W. 0000-0002-3895-813X Enns Entomology Museum, Division of Plant Science, University of Missouri-Columbia, Missouri 65211, USA. SitesR @ missouri. edu; https: // orcid. org / 0000 - 0002 - 3895 - 813 X Author Sangpradub, Narumon Applied Taxonomic Research Center, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand text Zootaxa 2021 2021-11-22 5071 1 97 117 journal article 3307 10.11646/zootaxa.5071.1.5 f5a054cf-41c7-40cd-bac9-63e1ea8d1b8e 1175-5326 5723327 C7DFE939-E932-4570-8496-7A67A51D4D7A

TABLE 1. Morphological comparison of species of Dineutus and Porrorhynchus in Thailand.

Character	D. australis	D. sitesi	D. spinosus	D. unidentatus	P. marginatus
Male
Body length (mm)	7.6–8.2	15.0–17.0	6.4–8.0	6.0–6.7	15.6–18.6
Body form	oval	broadly oval	oval	narrowly oval	broadly oval
Apex of flagellomere VI	darkly colored	darkly colored	lightly colored	darkly colored	darkly colored
Elytral apices with parasutural spines	No	No	Yes	No	Yes
Epipleural spines present	Yes	No	Yes	Yes	Yes
Elytral apices with serration	Yes	No	weak serration	Yes	weak serration
Lateral marginal of pronotum and elytron	darkly colored, black to brown	darkly colored, black	light colored, orange or yellow	dark colored, black	light colored, yellow or white
Ventral surface of protrochanter apically	with patches of thick setae	without setae and patches of thick setae	with few setae	with few setae	with small cluster setae
Profemur with sub-apicoventral tooth	No	Yes	No	No	No
Shape of protibial	wedge-shaped	club-shaped	wedge-shaped	wedge-shaped	club-shaped
Venter colored	black	reddish to brown	yellow to brown	brown to black	yellow
Epipleura colored	brownish	reddish to black	yellow	brown	yellow
Female
Body length (mm)	8.1–8.2	13.4–15.7	6.9–8.1	6.4–6.9	15.4–17.4
Body form	oval	broadly oval	oval	narrowly oval	broadly oval
Apex of flagellomere VI	darkly colored	lightly colored	lightly colored	darkly colored	darkly colored
Elytral apices with parasutural spines	No	No	Yes	No	Yes
Epipleural spines present	No	No	Yes	Yes	Yes
Elytral apices with serration	Yes	No	weak serration	Yes	weak serration
Ventral surface of protrochanter apically	with setae	without setae and patches of thick setae	with setae	with setae	without setae and small cluster setae
Profemur with sub-apicoventral tooth	No	No	No	No	No
Shape of protibial	wedge shaped	club-shaped	wedge shaped	wedge shaped	club-shaped
Venter colored	black	reddish to brown	yellow to brown	brown to black	yellow
Epipleura colored	brownish	reddish to black	yellow	black	yellow