Revision of the genus Pselaphomorphus Motschulsky, 1855 (Staphylinidae, Pselaphinae: Jubini) Author Vásquez-Vélez, Laura M. text Zootaxa 2016 4107 1 1 48 journal article 39180 10.11646/zootaxa.4107.1.1 dcbcfda1-5e9d-4f60-aea6-bcedb6402494 1175-5326 261931 248E86E7-C8D5-4542-81EE-4854276C7CE0 Key to species of Pselaphomorphus , based on males 1 Head triangular ( Fig. 8 A), base of the antennal tubercle not longer that the eye..................................... 2 - Head pear-shaped ( Fig. 4 A) to elongate ( Fig. 5 ), base of the antennal tubercle longer than the eye diameter............. 12 2 Antennal clava evident; antennomers 7 to 11 dictintively wider ( Fig. 6 A)......................................... 3 - Antennal clava not evident ( Fig. 4 A)...................................................................... 8 3 All antennomeres quadrate ( Fig. 8 A); body length less than 2.0 mm.............................................. 4 - Clava antennomeres elongate ( Fig. 4 A) antennomere 7 at least twice as long as antennomere 6........................ 5 4 Aedeagal median lobe divided medially into four arms ( Figs. 8 B, 8C). Longer arm extending upward and curved from left to middle in dorsal view. Accessory lobes absent................................. Pselaphomorphus breviantennae n. sp. - Aedeagal median lobe divided apically as short as accessory lobes ( Figs. 13 C, 13D). Accessory lobes present..................................................................................... Pselaphomorphus fluminosus n. sp. 5 Pronotum with obtuse spines between the lateral lobes and the basal lobe ( Fig. 16 A)................................ 6 - Pronotum without spines................................................................................ 7 6 Median lobe of aedeagus flattened, complete, accessory lobe complete...... Pselaphomorphus tucumanensis n. sp. ( Fig. 32 ) - Median lobe of aedeagus divided into two arms, accessory lobes divided...... Pselaphomorphus longiceps Raffray ( Fig. 16 ) 7 Phallobase asymmetric ( Fig. 15 B), median lobe short and slender. Two accessory lobes shorter than median lobe..................................................................................... Pselaphomorphus incorum n. sp. - Phallobase symmetric ( Fig. 23 B), median lobe divided into two arms: left arm laminate, right arm cylindrical, located medi- ally; accessory lobe divided into two arms with acute apices.................... Pselaphomorphus montsineryensis n. sp. 8 Pronotal lobes triangular ( Fig. 26 A), basally rounded; antennomere 6 small and quadrate, 7 elongate; elytra with the basal ridge weak, discal depression and humeral teeth absent................................. Pselaphomorphus parki n. sp. - Pronotal lobes trapezoidal or rectangular ( Fig. 30 A); antennomere 6 small and elongate, antennomere 7 elongate and at least three times longer than 6; elytra with strong basal ridge discal depression and humeral teeth present.................... 9 9 Discal depression extending slightly beyond the humeral tooth ( Fig. 12 A).............. Pselaphomorphus chandleri n. sp. - Discal depression not extending beyond the humeral tooth.................................................... 10 10 Pronotal disc rectangular ( Fig. 24 A); genitalia short ( 0.6 mm ) and symmetrical ventrally membranous, median lobe complete, not divided ( Figs. 24 B, 24C)................................................ Pselaphomorphus motschulskyi n. sp. - Pronotal disc oval, genitalia globose or narrow, divided or with accessory lobes present............................. 11 11 Phallobase rounded and globose, medially divided into two asymmetrical arms ( Figs. 18 B, 18C)............................................................................................. Pselaphomorphus macrommatus n. sp. - Phallobase regular, narrow and symmetrical, median lobe laminate, accessory lobe cylindrical ( Figs. 30 B and 30C)............................................................................... Pselaphomorphus simplicipenis n. sp. 12 Head elongate: base of the antennal tubercle longer than eye diameter; aedeagus with two median lobes ( Fig. 5 )......... 13 - Head pear-shaped: base of the antennal tubercle as long as eye diameter; aedeagus with one median lobe ( Fig. 22 )........ 14 13 Body color and pilosity amber ( Fig. 5 A); aedeagus with two accessory lobes, one divided ( Figs. 5 B, 5C)........................................................................................ Pselaphomorphus agametopus n. sp. - Body color reddish and pilosity bright yellow ( Fig. 17 A); aedeagus with one accessory lobe surrounding median lobes ( Figs. 17 B, 17C).............................................................. Pselaphomorphus longissimus n. sp. 14 Antennae with five segmented clava; antennomere 7 twice as long as antennomere 6 and distinctively wider ( Fig. 22 A)... 15 - Antennae without evident clava; antennomere 7 not longer than 6 and of similar width ( Fig. 31 A)..................... 17 15 Pronotal lateral lobes triangular with the basal region obtuse; pronotal disc oval ( Fig. 22 A).............................................................................................. Pselaphomorphus microphthalmus Raffray - Pronotal lobes triangular with the basal region rounded ( Figs. 6 A, 27A)......................................... 16 16 Obtuse spines present between lateral and basal lobes of pronotum ( Fig. 27 A.)............ Pselaphomorphus raffreyi n. sp. - Pronotum without spines between lateral and basal lobes ( Fig. 6 A).................. Pselaphomorphus azuayensis n. sp. 17 Phallobase irregular ( Figs. 19 B, 31B)..................................................................... 18 - Phallobase regular ( Figs. 9 C, 21B), some species with the head sulcus wider than eye radius ( Fig. 9 B)................. 21 18 Accessory lobe of the aedeagus as long as half of the median lobe ( Figs. 19 B, 19C, 28B, 28C)....................... 19 - Accessory lobe of aedeagus shorter than half of the median lobe ( Figs. 14 B, 14C, 31B, 30C)......................... 20 19 Accessory lobe membranous and laminate ( Fig. 19 )........................... Pselaphomorphus maldonadensis n. sp. - Accessory lobe of aedeagus, in dorsal view, long, straight and cylindrical, with the apex acute ( Fig. 28 B)........................................................................................ Pselaphomorphus santaecrucis n. sp. 20 Accessory lobe of aedeagus, in dorsal view, rounded basally and acute apically, curved to right ( Fig. 14 B)........................................................................................ Pselaphomorphus iguazuensis n. sp. - Accessory lobe short, less than one-third the length of median lobe ( Fig. 31 )............. Pselaphomorphus thayerae n. sp. 21 Body coloration reddish, pilosity clear or light yellow; antennomere length gradually increasing after 6................ 22 - Body coloration dark brown, pilosity bright yellow; antennomere length evenly increasing throughout ( Fig. 21 A).................................................................................... Pselaphomorphus melanus n. sp. 22 Head longitudinal sulcus wider than eye radius ( Fig. 9A, 9 B).................................................. 23 - Head longitudinal sulcus not wider than eye radius, fusiform ( Figs. 4 A)......................................... 24 23 Head longitudinal sulcus rounded ( Fig. 9A )....................................... Pselaphomorphus bruchi Raffray - Head longitudinal sulcus linear ( Fig. 9 B).................................... Pselaphomorphus carenobothrus n. sp. 24 Mesotrochanter armed with acute spine that projects vertically, the spine longer than mesotrochanter width ( Fig. 4 B)............................................................................. Pselaphomorphus acutispinosus n. sp. - Mesotrochanter triangular without projection or with weak projection not longer than mesotrochanter width............. 25 25 Accessory lobe of aedeagus present ( Figs. 11 B, 11C, 25B, 25C)................................................ 26 - Accessory lobe of aedeagus absent ( Figs. 7 C, 20B, 20C, 33B, 33C)............................................. 27 26 Accessory lobes short, cylindrical basally, and dorsal to two arms of median lobe ( Fig. 10 B).................................................................................................. Pselaphomorphus cayenennsis n. sp. - Accessory lobe longer than median lobe, flattened ( Fig. 24 B).......................... Pselaphomorphus newtoni n. sp. 27 Aedeagus in dorsal view parallel-sided throughout its length.................................................. 28 - Aedeagus in dorsal view becoming wider from mid point to apex............................................... 31 28 Aedeagus divided apically............................................................................. 29 - Aedeagus not divided apically; in lateral view curved dorsally beyond phallobase.................................. 30 29 Aedeagus apically divided into three short spines; in lateral view flat, not curved dorsally ( Fig. 32 C).......................................................................................... Pselaphomorphus veracruzanus n. sp. - Aedeagus apically divided into two arms, median lobe inserted into circular structure at base ( Fig. 6 C).......................................................................................... Pselaphomorphus bolivarensis n. sp. 30 Aedeagus in dorsal view straight, slightly curved at apex ( Fig. 19 C)................. Pselaphomorphus mayaorum n. sp. - Aedeagus in dorsal view curved medially to right and apically to left ( Fig. 33 C).......... Pselaphomorphus wagneri n. sp. 31 Aedeagus apically with two long arms projecting dorsally ( Figs. 28 B, 28C).... Pselaphomorphus sculpturatus Motschulsky - Aedeagus apically rounded, lacking arms ( Figs. 9 B, 9C).............................. Pselaphomorphus carltoni n. sp.