Jansonia Schürhoff, 1937

Ratcliffe, Brett C., 2014, A Review of the Neotropical GeneraAstroscaraSchürhoff, 1937, ChiriquibiaBates, 1889, HadrostictaKraatz, 1892, JansoniaSchürhoff, 1937, MacrocraniusSchürhoff, 1935, andTiaroceraBurmeister, 1842 (Coleoptera: Scarabaeidae: Cetoniinae: Gymnetini), The Coleopterists Bulletin 68 (3), pp. 363-376 : 370

Jansonia Schürhoff, 1937

Jansonia Schürhoff 1937: 56 . Type species: Gymnetis anceps Janson 1875: 373 , by original designation.

Jansonella Blackwelder 1944: 263 . Unjustified replacement name; see “Nomenclature” below.

Description. Form elongate, subparallel, slen- der, slightly dorsoventrally flattened. Length 16–22 mm. Color dorsally opaque black with cretaceous margins on pronotum and elytra. Head: Shape subrectangular. Head without armature, clypeal apex broadly rounded on sides, apex distinctly emarginate. Antenna with 10 antennomeres, club subequal in length to entire stem. Pronotum: Subtrapezoidal, widest near base, gradually convergent to anterior angles, basomedian lobe strongly produced posteriorly, lobe covering all but tip of scutellum. Sides with complete marginal bead. Elytra: Widest at base, posthumeral emargination distinct. Bead present on lateral margins. Pygidium: Surface with large, transverse, crescent-shaped, setigerous punctures, setae short, moderately dense, piceous to black. Venter: Mesometasternal process, in lateral view, distinctly protuberant, subparallel to ventral axis of body, apex narrowly rounded ( Fig. 17 ). Abdominal ventrites with large, dense puntures, central third nearly impunctate, longitudinally sulcate in males. Legs: Protibia in males slender, with 1 apical tooth, females with protibia tridentate. Parameres ( Figs. 19–20 ): Form subrectangular in caudal view, apices broadly rounded, teeth lacking.

Nomenclature. The genus Jansonia was established by Schürhoff (1937). Bates (1891), in an apparent lapsus, used the name Jansonia one time in a narrative discussing Cicindelidae from India. He was actually referring to Chaudoir’ s (1865) tiger beetle genus Jansenia but misspelled it. Blackwelder (1944) noted the previous use by Bates of Jansonia and concluded that Schürhoff ’s (1937) Jansonia was a junior homonym, and so he replaced the name with Jansonella . This replacement was erroneous since Bates did not propose, describe, or inadvertently establish Jansonia but simply misspelled Jansenia .

Figures

Figs. 16–20. Jansonia anceps. 16) Habitus; 17–18) Lateral and ventral views, respectively, of form of mesometasternal process; 19–20) Parameres.