New species of darkling beetles (Coleoptera: Tenebrionidae) from San Salvador Island, Bahamas
Author
Steiner, Warren E.
Author
Jr
text
Zootaxa
2006
1158
1
38
journal article
10.5281/zenodo.172291
dac5677d-dc7c-4649-a5ac-8f9e9250bdd3
11755326
172291
Blapstinus humilis
Casey
,
new status
In making identifications of species of
Blapstinus
from
the Bahamas
, comparisons among southern Florida species and many specimens from
Cuba
, Hispaniola,
Puerto Rico
, and the
Virgin Islands
were warranted. Dissections of male aedeagi were done. The
type
specimens of
B. humilis
Casey (1890)
and recent conspecific specimens from Florida appear to match Bahamian specimens (Great Exuma and San
Salvador
). I am provisionally using the name in this study. It should be noted at present that the same species, based on comparisons made among dissected specimens, also occurs in
Cuba
,
Puerto Rico
, St. Croix, and Hispaniola and probably involves some synonymy under an older name, plus synonymy of more recent names, e.g.,
B. dominicus
Marcuzzi (1962)
. The Central American species described by
Champion (1885)
could also be involved, as other tenebrionid species have been shown to have a wide circumCaribbean distribution.
Blapstinus humilis
Casey
, however, was placed in synonymy under
B. fuscus
Casey
, from Texas, by
Davis (1970, unpublished thesis)
. This was recognized (and so validated) in a checklist of Florida beetles (
Peck and Thomas 1998
). With examination of Casey’s
type
material, however, I believe that Davis was incorrect in this decision. He made a dissection of the aedeagus of Casey’s only male specimen of
B. humilis
labeled “Fla.” but did not dissect any of the
type
series of
B. fuscus
. He illustrated the aedeagus of the Texas form but did not compare it to the Florida
type
. The first of nine Casey specimens of
B. fuscus
, labeled as
lectotype
by Davis, has now been dissected and compared among all examples mentioned above, plus other abundant material from eastern Texas. The two populations appear too distinct to be considered as one species: In the Texas specimens, aedeagi have parameres more broad with sides gradually curved from base to apex; body surfaces have noticeably more conspicuous setae, and antennae are consistently longer, than in Florida specimens. The latter have parameres narrow, with sides parallel in the basal 3/4ths, and the general body outline is relatively more parallelsided than the elongateoval form of the Texas specimens. Therefore, while the two taxa may be part of a large circumcaribbean complex,
B. humilis
should be brought out of synonymy and recognized as a valid species until further revision of this difficult group can be carried out.