The world fauna of Synchroidae Lacordaire, 1859 (Coleoptera, Tenebrionoidea, Synchroidae) Author Hsiao, Yun Author Ondřej Konvička Author Chiun-Cheng Ko text European Journal of Taxonomy 2018 2018-02-23 407 1 33 journal article 30667 10.5852/ejt.2018.407 dd944d67-5196-4c44-8497-416acd882bb0 1183845 23400D07-8995-4BCC-ADB2-92DDBC4A0161

Table 2. Diagnostic characters among Synchroa Newman, 1838, Synchroina Fairmaire, 1898 and Thescelosynchroa gen. nov.

	Synchroa	Synchroina	Thescelosynchroa gen. nov.
Size	Large	Small	Large
	(mostly 10.0–13.0 mm) (7.0–9.0 mm)		(ca 10.0 mm)
Eyes	Large; ratio of eye	Small; ratio of eye diameter to interocular space in
	diameter to interocular	males ca 1.8–2.2
	space in males ca
	1.5–1.7
Apical maxillary	Securiform	Obliquely truncate	Securiform
palpomere
Shape of pronotum	Lateral sides strongly	Lateral sides	Lateral sides feebly arcuate
	narrowed anteriorly	somewhat rounded,
		moderately narrowed
		anteriorly
Greatest width of	As wide as elytra at humeri		Distinctly narrower than
pronotum			elytra
Surface of	Distinctly punctate	Smooth	Distinctly punctate
mesoventral cavity
Claws	Simple	Serrate	Simple
Aedeagal median	Slender and tapered, Elongate and clavate,		Elongate and clavate,
lobe	not extending the apex not extending the apex		extending from the apex of
	of the tegmen	of the tegmen	the tegmen