Bledius borzonei, Castro, Jessica Cristina De, Caron, Edilson & Rosa, Leonardo Cruz Da, 2016

Castro, Jessica Cristina De, Caron, Edilson & Rosa, Leonardo Cruz Da, 2016, Update on the Brazilian coastal species of Bledius Leach (Coleoptera: Staphylinidae: Oxytelinae) with the description of two new species, Zootaxa 4111 (2), pp. 145-157: 146-149

publication ID

http://doi.org/10.11646/zootaxa.4111.2.3

publication LSID

lsid:zoobank.org:pub:C4BF5EF9-EEA1-41B2-B139-36F6ED8A3A0B

DOI

http://doi.org/10.5281/zenodo.6056930

persistent identifier

http://treatment.plazi.org/id/B62AD834-FFEA-FF85-FF4B-BAC4FBEE6B48

treatment provided by

Plazi

scientific name

Bledius borzonei
status

sp. nov.

Bledius borzonei   sp. nov.

( Figs. 3 View FIGURES 1 – 6 , 7– 11 View FIGURES 7 – 11 )

Type material. Holotype, sex undetermined, from DZUP, labeled as “ BRA, Sergipe, Mosqueiro/ 11 º08’00’’ S, 37 º08’ 45 ’’ O / Coleta: corer 10cm diâmetro/ 08/IV/ 2013 / L. C. Rosa, col.” [white label, printed]. Four paratypes, three males, two from DZUP and one from FMNH and one sex undetermined from FMNH, labeled as the type.

Description. BL: 3.00 mm, BW: 1.00 mm.

Male. Body dark brown to black, with antenna, mouthparts and legs yellowish to light brown, elytra golden yellow with median basal and subapical median brown spots. Body subcylindrical and covered with fine microsetae. Dorsum of head, pronotum and elytra with sculpturing.

Antenna with antennomeres 6–11 increasingly wide and forming somewhat a club. Clypeus with emargination on its anterior margin. Epistomal suture arcuate. Labrum transverse, with anterior margin slightly emarginate. Cuticular process of internal fringe of epipharyngeal lobes with serrated apex. Mandibles tridentate. Mentum subquadrate. Submentum extending slightly onto venter of head, posterior margin strongly V-shaped. Gular sutures fused anteriorly. Pronotum wider than long (PW/PL: 1.39), with anterior pronotal angles produced, posterior margin curved. Prototergosternal suture present, procoxal fissure closed, protrochantin concealed. Elytra slightly longer than wide (EL/BW: 1.14), with a sclerotized median tip on the posterior margin ( Fig. 7 View FIGURES 7 – 11 , arrow), elytral epipleural ridge complete. Sternite VII without median lobe and truncate on posterior margin. Tergite VIII with folds on anterior margin ( Fig. 10 View FIGURES 7 – 11 , arrow), with pores at the front of the antecosta ( Fig. 11 View FIGURES 7 – 11 ), and truncate on posterior margin. Posterior margin of sternite VIII truncate. Tergite IX with ventral struts on male. Tergite X truncate on posterior margin and with a membranous projection. Aedeagus follows pattern of punctatissimus   group with parameres slender and cylindrical, and median lobe bulbous. Aedeagus with subapical emargination on median lobe in lateral view and apex curved ( Fig. 8 View FIGURES 7 – 11 , arrow).

Female. Similar to male except for tergite IX without ventral struts. Annelidoid spermatheca long and slender, six times longer than wide, and evidently the median portion is the widest ( Fig. 9 View FIGURES 7 – 11 ).

Distribution. Material examined: Brazil (Sergipe).

Etymology. The specific name in honor to the professor Carlos Alberto Borzone of the Federal University of Paraná ( UFPR), dedicated colleague that has started and encouraged the recent studies of coastal Bledius   in Brazil.

Remarks. The anneloid spermatheca of Bledius borzonei   , sp. nov. places it within the punctatissimus   group. Bledius borzonei   , sp. nov. is similar to B. fernandezi   and B. punctatissimus   , all having the procoxal fissure closed, with the protrochantin concealed. Bledius borzonei   , sp. nov. can be easily differentiated from B. fernandezi   by the posterior margin of the tergite VIII, this being truncate on B. borzonei   , sp. nov. ( Fig. 10 View FIGURES 7 – 11 ) and emarginate on B. fernandezi   ( Fig. 15 View FIGURES 12 – 15 of Caron & Ribeiro-Costa 2007). Also, the spermatheca of B borzonei   , sp. nov. is long and slender ( Fig. 9 View FIGURES 7 – 11 ), while the spermatheca of B. fernandezi   is short and with the base wider than the apex ( Fig. 16 View FIGURES 16 – 21 of Caron & Ribeiro-Costa 2007). This species can be differentiated from B. punctatissimus   by the anterior margin of the pronotum, this being with the anterior angles produced in B. borzonei   , sp. nov. and B. punctatissimus   with the anterior margin broadly arcuate to truncate (Fig. 75 of Herman 1972).

Herman (1986) states that species of Bledius   have a double reservoir on tergite IX, although, in B. borzonei   , sp. nov., besides the normal IX reservoirs, the new species has folds and emarginations on the anterior margin of tergite VIII, showing pores at the front of its antecosta ( Figs. 10 View FIGURES 7 – 11 , arrow, and 11). These characteristics might be related to tergal glands, but no reservoir was found in this region. Steidle and Dettner (1993) found similar pores on tergite VII for some species of Aleocharinae   .

Bledius borzonei   , sp. nov. was sampled in the edge of a tidal creek, located at mouth of Vaza-Barris river ( Fig. 32 View FIGURES 32 ). This place is an estuarine beach (i.e., a low-energy environment) characterized by soft sediments composed by very fine sand. The samples were taken with PVC cores (10cm of diameter) and randomly distributed around the driftline ( Fig. 33 View FIGURES 33 ). In this place, Bledius borzonei   , sp. nov. was found coexisting with B. depressus   sp. nov. ( Fig. 34 View FIGURES 34 ). Bledius borzonei   , sp. nov. have not been found at local exposed ocean beaches yet.

Additional material. DZUP: Seven specimens. “ BRA, Sergipe, Mosqueiro/ 11 º08’00’’ S; 37 º08’ 45 ’’ O / Coleta: corer 10cm diâmetro/ 08/IV/ 2013 / L. C. Rosa, col.” [White label, printed].

DZUP

Universidade Federal do Parana, Colecao de Entomologia Pe. Jesus Santiago Moure

BRA

Slovak National Museum

FMNH

Field Museum of Natural History