Bledius caribbeanus Blackwelder, 1943

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 : 152-155

publication ID

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

publication LSID

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

DOI

https://doi.org/10.5281/zenodo.6056936

persistent identifier

https://treatment.plazi.org/id/B62AD834-FFEC-FF8B-FF4B-BD76FC2A6F21

treatment provided by

Plazi

scientific name

Bledius caribbeanus Blackwelder, 1943
status

 

Bledius caribbeanus Blackwelder, 1943 vs. B. hermani Caron & Ribeiro-Costa, 2007

( Figs. 5 View FIGURES 1 – 6 , 22– 31 View FIGURES 22 – 31 )

Bledius caribbeanus Blackwelder, 1943: 113 (Description, type locality: “ Tobago, seashores 3 miles southwest of Scarborough”). For a complete references list see Herman (2001); Frank & Ahn 2011: 31 (distribution); Rosa et al. 2013: 450 (error of distribution on the Brazilian northeastern states); Rosa et al. 2015: 251 (error of mention).

Bledius hermani Caron & Ribeiro-Costa, 2007: 455 (Description, type locality: “ Brazil, Paraná, Guaraqueçaba, Superagui”). Rosa et al. 2013: 450 (distribution on the Brazilian northeastern states, Alagoas and Rio Grande do Norte); Rosa et al. 2015: 251 (mention).

Bledius caribbeanus and B. hermani are two morphologically similar species, however they show very distinct distributions, the first species is distributed in Jamaica, Dominican Republic and Trinidad and Tobago ( Frank & Ahn 2011), and B. hermani occurs in all the Brazilian coast, from the states of Rio Grande do Norte to Rio Grande do Sul ( Rosa et al. 2013).

The only differences between the two species known to literature were described by Caron & Ribeiro-Costa (2007), one being the number of prominent setae on the sternite VII. This difference was not confirmed in this study; therefore, we suggest that this difference is not valid. Also, the fine setae around the apex of the accessory gland represented in Fig. 23 View FIGURES 22 – 31 ( Caron & Ribeiro-Costa 2007) is unfounded, probably being a mistake.

Although, some differences from literature have been validated, one being the size, Bledius caribbeanus is slightly larger (1.7–2.5mm) than B. hermani (1.76–1.84mm), and in relation to color of the body, being B. caribbeanus entirely dark brown to black, while B. hermani is reddish to dark brown, with the elytra yellowish with brown spots on the internal margin ( Fig. 5 View FIGURES 1 – 6 ) ( Caron & Ribeiro-Costa 2007).

With the review of the female paratype of Bledius caribbeanus deposited in FMNH and females of B. hermani ( DZUP), new differences between the two species were identified. Bledius caribbeanus has the antennomeres 3–5 as wide as long, being the antennomere 3 with obtuse sides and the antennomere 11 almost two times longer than wide ( Fig. 22 View FIGURES 22 – 31 ), while B. hermani has the antennomeres 3–5 wider than long, being the antennomere 3 with parallel sides and the antennomere 11 equal to slightly longer than wide ( Fig. 27 View FIGURES 22 – 31 ).

In relation to the terminalia, Bledius caribbeanus has the anterior margin of tergite VIII with a median emargination ( Fig. 23 View FIGURES 22 – 31 , arrow), while B. hermani has the anterior margin of tergite VIII with sublateral emarginations ( Fig. 24 View FIGURES 22 – 31 , arrow). Besides, the sternite VIII of B. hermani has the median area of the posterior border weakly sclerotized ( Fig. 26 View FIGURES 22 – 31 , arrow), not being observed in B. caribbeanus ( Fig. 25 View FIGURES 22 – 31 ). Also, the tergite X of B. caribbeanus has basal angles more rounded, apical margin slightly curved and it is longer than wide ( Fig. 28 View FIGURES 22 – 31 , arrow), as B. hermani has basal angles less rounded, apical margin truncate and it is as wide as long ( Fig. 29 View FIGURES 22 – 31 , arrow).

The spermatheca could not be seen on the type material of B. caribbeanus , but based on the drawings of Herman (1972, Fig. 115), the two spermathecas appear to be similar in shape ( Fig. 31 View FIGURES 22 – 31 ). Unfortunately, the male genitalia ( Fig. 30 View FIGURES 22 – 31 ) of the two species was not compared because no male was found of B. caribbeanus .

In this study, we extended the distribution of Bledius hermani for a new Brazilian state, Rio de Janeiro, and a new locality in the state of Sergipe.

About Bledius caribbeanus , in this study, the distribution of B. caribbeanus is corrected, not occurring in Brazil and being restricted to the Caribbean Sea (see remarks under B. depressus , sp. nov.).

Examined material. Bledius caribbeanus Blackwelder, 1943 . FMNH: One specimen. “(1) Guadeloupe / BasseTerre/ 30.X. 1935 ” [White label, locality printed and date handwritten]. (2) “Sta 77. A/ Blackwelder” [White label, printed with number handwritten]. (3) “ParatypeNo/ 52372 / U.S. N.M. [Orange label, printed with numbers handwritten].

Bledius hermani Caron & Ribeiro-Costa, 2007 . DZUP: 25 specimens. Two specimens: “ BRAZIL, PB, Conde, P. do/ Carneiros/ 07º15,28’ S 34 º54,29’ W / 15 -II- 2010 / L. Sousa-Souto, col.” [White label, printed]. Three specimens: “BR-AL-Pontal do Coruripe/ 10 º 10 ’ 20 ”S 36 º 10 ” 12 ”W/ 8 -X- 2011 / Ambrosi, B e L. Souto, col.” [White label, printed]. Ten specimens: “ BRAZIL, SE, Baixinho Imp.,/ P. Aruana/ 11 º01,82’ S 37 º04,65’ W / 23 -I- 2010 / L. C. Rosa, col.” [White label, printed]. New locality record. Ten specimens: “ BRASIL, RJ, Búzios/ Barra do Una/ 04-VII- 2012 / M.P. Mendes, col.” [White label, printed]. New locality record.

FMNH

Field Museum of Natural History

DZUP

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

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Bledius

Loc

Bledius caribbeanus Blackwelder, 1943

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

Bledius hermani

Rosa 2015: 251
Rosa 2013: 450
Caron 2007: 455
2007
Loc

Bledius caribbeanus

Rosa 2015: 251
Rosa 2013: 450
Frank 2011: 31
Blackwelder 1943: 113
1943