A Revision of Taiwanese Species in the Genus Psammoecus Latreille (Coleoptera, Silvanidae) Author Yoshida 1, Takahiro Author Karner, Michael Author Hirowatari, Toshiya text Zoological studies 2018 2018-04-23 57 18 1 18 journal article 53759 10.6620/ZS.2018.57-18 cff4ab26-6fdc-462b-aaa0-b8e8f87afd71 PMC6624643 31966258 8064335 Key to species of the Genus Psammoecus of Taiwan (after Yoshida and Hirowatari 2014 ) 1. Teeth of lateral margins of pronotum relatively short and of identical size ..................................................................... 2 - Teeth of lateral margins of pronotum relatively long. Posterior teeth longer than those of anterior margins ...... 5 2. Distance between teeth of lateral margins of pronotum irregular ................................................ dentatus Grouvelle - Distance between teeth of lateral margins of pronotum regular .............................................................................. 3 3. Anterior margin of pronotum weakly curved. Dorsolateral portions of pronotum with no impressions ........................... ............................................ hiranoi Yoshida and Hirowatari - Anterior margin of pronotum strongly curved. Dorsolateral portions of pronotum impressed lightly ............................. 4 4. A row of long erect setae along each lateral margin of elytra. Anterior angles of pronotum somewhat expanded ... ............................................................. taiwanensis sp. nov. - No long seta on anterolateral margins of elytra. Anterior angles of pronotum not expanded ....... harmandi Grouvelle 5. Black elytra with yellow maculae ........... simonis Grouvelle - Yellow elytra with black maculae or no maculae .............. 6 6. Teeth of lateral margins of pronotum long and slender. Pubescence composed of setae of two types , moderate length and long, on head and pronotum. Punctation weak and sparse ........................................... delicatus Grouvelle - Teeth of lateral margins of pronotum distinct, but shorter. Pubescence composed of mostly same length setae on head and pronotum. Punctation somewhat strong and dense ................................................................................ 7 7. Basis of parameres wide. Distance between posterior margin of phallobase and deepest point of incision of anterior margin broad ................. trimaculatus Motschulsky - Basis of parameres comparatively narrow ....................... 8 8. Distance between posterior margin of phallobase and deepest point of incision of anterior margin wide. Widened basal part of parameres rectangular .................................... ................................... labyrinthicus Yoshida and Hirowatari - Distance between posterior margin of phallobase and deepest point of incision of anterior margin narrow. Widened basal part of parameres triangular ....................... .................................................................. triguttatus Reitter