Pseudocanthon pantanensis Nazaré-Silva & Silva, Nazare-Silva & Silva, 2021

Nazaré-Silva, Everton E. & Silva, Fernando A. B., 2021, A taxonomic revision of the South American species of Pseudocanthon Bates, 1887 (Coleoptera: Scarabaeidae: Scarabaeinae: Deltochilini), Zootaxa 5027 (1), pp. 61-86: 76

publication ID

https://doi.org/10.11646/zootaxa.5027.1.3

publication LSID

lsid:zoobank.org:pub:D8FE51C2-C34F-47CE-87FC-80BAB16C54BD

DOI

http://doi.org/10.5281/zenodo.5492696

persistent identifier

http://treatment.plazi.org/id/038A87A7-FFF2-FFA0-71F5-FE7EBE3518CF

treatment provided by

Plazi

scientific name

Pseudocanthon pantanensis Nazaré-Silva & Silva
status

new species

Pseudocanthon pantanensis Nazaré-Silva & Silva   , new species

( Figs. 2D, 2G View FIGURE 2 , 3E View FIGURE 3 , 4D View FIGURE 4 , 5E View FIGURE 5 , 6E View FIGURE 6 , 7B View FIGURE 7 )

urn:lsid:zoobank.org:act:0A482135-A418-45E6-81E6-AA88A8B62102

Etymology. The specific name is the Latinization of the Portuguese demonym “pantaneiro”, which refers to the inhabitants of the Pantanal wetlands, the place where this species has been recorded. It should be treated as a Latin third-declension adjective in the nominative case.

Diagnosis. Pseudocanthon pantanensis   is similar to P. chaquensis   in having the pronotum with dense granulate microsculpture, well impressed at central portion ( Fig. 2A View FIGURE 2 ); eighth stria of elytra extending across the basal half of the elytra, with shallow carina at basal portion ( Fig. 2D View FIGURE 2 ); and posterior edge of metafemur lightly angulate at basal third, expanded towards the abdominal ventrites ( Fig. 4D–E View FIGURE 4 ). However, P. pantanensis   can be easily distinguished by its metallic green pygidium, with an orange band at posterior edge ( Fig. 2G View FIGURE 2 ); parameres curved and pointed apically ( Fig. 5E View FIGURE 5 ); frontolateral peripheral (FLP) endophallite sinuous, inferior portion rounded ( Fig. 6E View FIGURE 6 ); accessory endophallite (AE) absent ( Fig. 6E View FIGURE 6 ). In P. chaquensis   , the pygidium is completely orange ( Fig. 2H View FIGURE 2 ); the parameres are truncate at apex, with small obtuse projection at ventral edge ( Fig. 5F View FIGURE 5 ); the frontolateral peripheral endophallite is elongate and bifurcate at inferior portion ( Fig. 6F View FIGURE 6 ); and accessory endophallite is present, being small and elongate ( Fig. 6F View FIGURE 6 ).

Description. Holotype. Length. 4.1 mm. Width. 2.5 mm. Colour. Surface of body black with metallic green reflections; legs orange; orange spot on clypeus and on last abdominal ventrite. Surface punctation and sculpturing. In general, surface punctation consists of foveolate punctures. Surface of head, mesoventrite, metaventrite, elytra, abdomen, tibiae, and femora with dense and well-impressed granulate microsculpture; lateral edges and anterior angle of pronotum, hypomera, lateral edges, and anterior portion of metaventrite, mesepimeron, metanepisternum, epipleuron, tibiae, and femora with imbricate microsculpture. Pronotum with dense and well-impressed granulate microsculpture centrally ( Fig. 2A View FIGURE 2 ). Elytra. Eighth elytral stria extending across the basal half of the elytra, with shallow carina at basal portion ( Fig. 2D View FIGURE 2 ). Legs. Posterior edge of metafemur lightly angulate at basal third, expanded towards at abdominal ventrites ( Fig. 4D View FIGURE 4 ). Abdomen. Metallic green pygidium, with an orange band at posterior edge ( Fig. 2G View FIGURE 2 ) Tegmen. Apex of parameres curved and pointed ( Fig. 5E View FIGURE 5 ). Endophallus. Frontolateral peripheral (FLP) endophallite sinuous, inferior portion rounded ( Fig. 6E View FIGURE 6 ); acessory endophallite (AE) absent ( Fig. 6E View FIGURE 6 ).

Type material. 31♀ and 38♂. Holotype. BRAZIL: MATO GROSSO: Poconé, Pantanal , [17°50.73’S; 57°24.17’W], 15.XI.2011, pitfall with human feces, J. Silva GoogleMaps   1♂ ( CEMT). Paratypes. BRAZIL: MATO GROSSO: Poconé, Pantanal , [17°50.73’S; 57°24.17’W], 15.XI.2011, pitfall with human feces, J. Silva GoogleMaps   1♂ ( MZUFPA); Poconé, Pantanal , [17°50.73’S; 57°24.17’W], 15.XI.2011, pitfall with human feces, J. Silva GoogleMaps   29♀ 36♂ ( CEMT); MATO GROSSO DO SUL: Corumbá, Passo da Lontra , [19°34’32.91’’S; 57°01’36.2’’W], 93 m, II.1996, J. Louzada & F. Vaz-de-Mello GoogleMaps   1♀ ( CEMT); Corumbá, Passo da Lontra , [19°34’32.91’’S; 57°01’36.2’’W], 93 m, [no date], V. Lopes GoogleMaps   1♀ ( CEMT)   .

Distribution. Known from Brazil (Mato Grosso and Mato Grosso do Sul) ( Fig. 7B View FIGURE 7 ). Areas of endemism [South America]: Brazilian subregion: South Brazilian dominion: Rondônia province. Chacoan subregion: Chacoan dominion: Chaco province (see Morrone 2014: fig. 12).