Three new species of Seira Lubbock (Collembola, Entomobryidae) from Mataraca, Paraíba State, Brazil
Author
Bellini, Bruno Cavalcante
Author
Zeppelini, Douglas
text
Zootaxa
2008
1773
44
54
journal article
10.5281/zenodo.182170
7c430cc6-4f5c-48e4-b92b-c471face123f
1175-5326
182170
Seira mataraquensis
sp. nov.
(
Figs 1
,
4
A)
Type
material.
Holotype
male, mounted on the same slide with one female specimen of
S. prodiga
.
Brazil
, Paraíba, Mataraca,
vi-2006
. Zeppelini, D. coll.
Paratypes
2 females
,
Brazil
, Paraíba, Mataraca,
vi-2006
. Zeppelini, D. coll. Material deposited in the Museu Nacional, Rio de Janeiro (CM/
MNRJ
).
Description.
Total length of the
holotype
1.22 mm
, other measurements in
Table 2
. Habitus typically entomobryid (
Fig. 1
A). Colour of mounted specimens pale grey. Dark blue pigment present on eye patches, antennae, lateral-ventral edges of meso and metathorax, lateral edges of abdominal segment IV, coxae and trochanters and a spot on the forehead typical for
Seira
. Yellowish rounded scales covering the first, second and the base of the third antennal segments, head, meso and metathorax, abdomen, coxae and trochanters. Fourth antennal segment not annulated, with an apical bulb and no pin setae. Eye patches oval, with the largest lens being A and the smallest lens being D (
Fig. 1
F). No interocular macrochaetae. Pre-labral and labral setae smooth. Labial triangle seta r absent. M1, M2 and E feathered (
Fig. 1
E). Trochanteral organ with 14 spine-like setae, arranged in two rows.
Pro
, meso and meta ungues with four inner teeth, one pair at the base and two unpaired teeth at the apex (
Figs 1
B-D). Unguiculi acuminate, with smooth edges (
Figs 1
B-D). Tenent hair capitate with smooth edges. Venter of manubrium with three subapical setae. No spine-like setae present on the manubrium. Dorsal macrochaetal distribution on head and body as in fig. 4A. Other characters are listed in
Table 3
.
Remarks.
The head chaetotaxy of
S. mataraquensis
sp. nov
is similar to that of
S. prodiga
(Arlé)
. They differ by the absence of macrochaetae in cephalic region
5 in
S. mataraquensis
sp. nov.
while
S. prodiga
has one pair, and in cephalic region 4D, where
S. mataraquensis
sp. nov.
has two macrochaetae and
S. prodiga
has only one. The chaetotaxy of the second and third abdominal of both species is also similar but it differs on the remaining segments. The typical large setae in the inner surface of the dens of
S. prodiga
is absent in
S. mataraquensis
sp. nov.
The dorsal head macrochaetae distribution of
S. mataraquensis
sp. nov.
resembles that of
S. blanca
Mari
Mutt
, but the latter has macrochaetae in cephalic regions 5 and 6 while
S. mataraquensis
sp. nov.
does not. Cephalic region 4 also differs by the presence of more macrochaetae in
S. mataraquensis
sp. nov.
Both species are similar in the labial triangle chaetotaxy, since they lack r seta and M1, M2 and E setae are feathered. Ungues and unguiculi are also similar, with the same shape and number of teeth. Both species differ in the arrangement of setae on metathorax and the number of setae on the first abdominal segment (4+
4 in
S. mataraquensis
sp. nov
and 5+
5 in
S. blanca
). Finally, both were collected in marine littoral habitats (see
Mari
Mutt 1986
).
FIGURE 1.
Seira mataraquensis
sp. nov.
A. habitus; B. first foot complex; C. second foot complex; D. third foot complex; E. all labial triangle setae; F. left eye patch.
TABLE 2
. Comparison of lengths of segments of the body of three new
Seira
species. Ant. = Antenna Segment; Abd. = Abdominal Segment; C. D. = Cephalic Diagonal. Measurements were taken from holotypes. * conversion rate to µm = x10.
| Segments |
S. mataraquensis
|
S. arenicola
|
S. pseudoannulata
|
| Ant. IV |
23 |
22 |
35 |
| Ant. III |
15 |
14 |
21 |
| Ant. II |
11 |
12 |
17 |
| Ant. I |
5 |
7 |
11 |
| Head length |
23 |
25 |
33 |
| Head (C. D.) |
27 |
28 |
36 |
| Mesothorax |
11 |
14 |
21 |
| Metathorax |
9 |
11 |
14 |
| Abd. I |
6 |
8 |
10 |
| Abd. II |
7 |
9 |
11 |
| Abd. III |
9 |
10 |
15 |
| Abd. IV |
33 |
38 |
50 |
| Abd. V |
5 |
9 |
10 |
| Abd. VI |
2 |
3 |
4 |
| Manubrium |
24 |
25 |
31 |
| Dens |
27 |
31 |
40 |
| Mucro |
1 |
1 |
3 |
Etymology.
The species is named after
type
locality, Mataraca, PB.
Distribution.
Good’s biogeographic zone 27 (
Good 1974
).