Subfamilial affiliation of Neoscirula (Acari: Prostigmata: Cunaxidae) and descriptions of three new species of this genus from Brazil
Author
Heyer, Jacob Den
Author
Castro, Tatiane Marie Martins Gomes De
text
Zootaxa
2008
1731
51
62
journal article
10.5281/zenodo.181318
af1c1844-576a-4c6f-bda6-da7f0371a864
1175-5326
181318
Genus
Neoscirula
Den Heyer, 1977
Type
species:
Neoscirula theroni
Den Heyer,1977
The genus
Neoscirula
was erected by
Den Heyer (1977)
and was consequently included in the subfamily Coleoscirinae (
Den Heyer 1980a
). It was transferred by
Smiley (1992)
to the subfamily Bonzinae
Den Heyer,1978
(
Nota bene
: The original spelling of the latter subfamily name is with a single
i
) mainly on the grounds of these mites having, according to his interpretation, a pair of geniculate
hg 1
setae, a feature not mentioned in the original description of this genus.
Den Heyer (1980b)
referred to this pair of setae as being “semi-geniculate” in
Neoscirula sevidi
. This could have led to the statement by
Smiley (1992)
that
Neoscirula
had geniculate setae
hg 1,
which is actually not the case for any known species of this genus. The authors of this paper are of opinion that the genus should stay in the Coleoscirinae for reasons subsequently presented.
Smiley’s (1992) first step to divide the family
Cunaxidae
is based on the presence of a pair of
geniculate
setae
hg 1,
regarding bent setae (common in most
Neoscirula
spp.) also as such. In order to be precise, the meaning of the term
geniculate
has been determined from various sources. The specific explanation is: “...bent at a
sharp
or
abrupt
angle….”. In the
Cunaxidae
geniculate structures occur only in two genera, i.e. in all
Bonzia
spp. and in an unpublished species of
Cunaxa
.
Den Heyer (1978)
redescribed
B. halacaroides
Oudemans
and
B. sphagnicola
Willmann
, illustrating what he regarded as geniculate
hg 1
setae. When investigating the
Cunaxa
spp.
Den Heyer (1979 b
&
c
) illustrated a peculiar pair of
vi
sensillae (fig. 1) which he also regards as
geniculate
.
FIGURE 1.
Geniculate sensillae as in a
Cunaxa
spp.
The first author of this paper is of the opinion that a new genus or subfamily should not be erected based on one species which differs from the other 20–25 species only by having geniculate sensillae
vi
. This means that
geniculate
setal structures should not be used as a first criterion for dividing a family (see
Smiley 1992
; p. 37). When this concept is strictly applied, only the genus
Bonzia
has a pair of true geniculate
hg 1
setae (fig. 2). The
hg 1
-setae of the genera
Parabonzia
and
Neoscirula
should be regarded as non-geniculate but bent in varying degree.
Den
Heyer & Castro (2008
, in press) also made a change in the notation of the ventral idiosomal chaetotaxy of the
Cunaxidae
.
The original three species included in
Neoscirula
were described by
Den Heyer (1977)
from
South Africa
; he added a fourth species in 1980.
Shiba (1978)
described one species from
Malaysia
while
Smiley (1992)
added three more species from North-America and
New Zealand
. Corpuz-Raros (1996) reported on seven species from the
Philippines
. Four species were described from
China
, two by
Lin & Zhang (1998)
and two by
Lin & Zhang (2002)
.
Mejia-Recamier & Palacios-Vargas (2007)
described three species from
Mexico
. The present paper describes three new Brazilian species.