Description of a new Pergalumna (Acari: Oribatida: Galumnidae) species from Mexico and its postembryonic development
Author
Páez, Jair
Author
Villagomez, Fernando
Author
Palacios-Vargas, Jóse G.
text
Zootaxa
2019
2019-07-26
4647
1
385
406
journal article
25547
10.11646/zootaxa.4647.1.25
fbeb92be-3725-4897-bfbf-969aba9f23a1
1175-5326
3353204
4BE72A8C-3CDD-4DFC-B35E-44C9F41DE804
Pergalumna ekaterinae
sp. nov.
(
Figs. 1–53
)
Description
. (Measurements in μm, average values in parenthesis) (N=10, seven males and three females). Length of males 434–503 (466), width 345–434 (363); length of females 444–493 (477), width 365 (365). Color brown, slightly lighter in medial prodorsal lenticular region.
Diagnosis.
Bothridial seta setiform unilaterally barbed, body ornamentation slightly punctuated, three striate bands visible in posterior region of notogaster, all prodorsal setae present, interlamellar seta longer than other prodorsal setae; all porose areas present,
A1
and
A2
near each other and sometimes slightly fused, notogaster with ten pairs of setae reduced to alveoli.
Prodorsum
(
Figs.1, 3, 4
). Surface smooth, lenticular region present, covering almost the entire surface of rostrum, with a yellowish lighter color than the rest of body, lamellar lines
L
and
S
present, arched and parallel, dorsosejugal porose area
Ad
(L=8, W=32) ellipsoidal, near bothridium; prodorsal setae (
Fig. 5
) setiform and barbed. Interlamellar seta
in
(120) setiform and barbed, longer than other prodorsal setae, (except bothridial seta), lamellar seta
le
(72) intermediate sized and barbed, rostral seta
ro
(58) small and barbed; bothridial seta
bs
(172) setiform and unilaterally barbed. Chelicera (L=160, W=59) (
Fig. 7
) of normal shape, ornamented with punctuations in anterior region, seta
cha
(40) longer than
chb
(24), both barbed.
Notogaster
(
Figs.1, 4
). Cerotegument dotted, with homogeneous ornamentation, three striate bands (
s
) present in posterior region, two of them near porose area
A3
, the other semicircular between them, better seen in caudal view (
Fig. 9
); ten pairs of notogastral setae reduced to alveoli, four pairs of notogastric porose areas present (
Fig. 6
), porose area
Aa
wider than long (L=18; W=56), oval; extra alveoli (
lx)
below
Aa
, anterolateral seta (
la
) near hinge of pteromorph, lateromedial seta (
lm
) located next to sagittal line, porose area
A1
(L=16; W=25) and
A2
(L=19; W=15) with irregular shape and diffuse border, resulting in seemingly fused porose areas; lyrifissure
im
above
h
3
. Seta
h
2
posterior to
A2
, lyrifissures
ih
and
ips
lateral and above
p
3
, opisthonotal gland (
gla
) well developed, slightly protuberant near notogastral border, porose area
A3
(L=15; W=28) posterior, surrounded by
h
1
,
p
1
and
p
2
, lyrifissure
ip
above
p
2
, in some specimens
ip
located below and between
p
1
and
p
2
.
Pteromorph bilobed (
Fig. 10
) (L=294, W=
180 in
proximal,
162 in
middle and
200 in
distal region) with irregular ornamentation forming thin and thick lines, central notch present, lyrifissure
ia
and alveolus
c
in habitual position.
Ventral plate
(
Fig. 2
). Cerotegument punctuated on whole plate. Subcapitulum (
Fig. 8
) (L=94; W=113) same ornamentation, seta
h
short (17); epimeral setation (1-0-2-1), setae
1a
,
3a
,
3b
and
4a
(8) present, one pair of aggenital setae (8) and three pairs of adanal setae (8) present, all short; lyrifissure
iad
above anal plate and below
ad
3
, without porose area postanalis (
Fig. 9
); genital plate with six setae inserted in 2–4 formula, with
g
1
and
g
2
(11) longer than
g
3
–g
6
(6); anal plate with two pairs of small setae (8).
Legs
(
Figs. 11–14
). All legs heterotridactylous, with basal granulation in femora. Leg setation and solenidia from leg I–IV (solenidium in parenthesis). Femora 4-4-2-2; genua 3(1)-3(1)-1(1)-2; tibiae 4(2)-4(1)-3(1)-3(1); tarsi 20(2)-15(2)-15-12.
FIGURES 1–4
.
Pergalumna ekaterinae
sp
.
nov
.
1. Notogaster dorsal view; 2. Ventral plate; 3. Prodorsum dorsal view; 4. Lateral region, pteromorph and legs omitted. Escale bar 100 µm (Figs. 1,2,4) and 20 µm (Fig. 3).
Leg I (
Fig. 11
). Femur L=
118 µm
, genu L=
49 µm
, tibia L=
69 µm
, tarsus L=
108 µm
. Solenidium σ (124) in- serted dorsally and pre-apically, φ1 (150) and φ2 (66) dorsal near apex, ω
1
(50) anterior to
ft´´
, ω
2
(78) posterior. Famulus (ε) short with blunt apex, situated between ω
1
and
ft´´
.
Leg II (
Fig. 12
). Femur L=
98µm
, genu L=
39 µm
, tibia L=
49 µm
, tarsus L=
69 µm
. Solenidium σ (90) apical, φ (73) pre-apical, ω
1
(20) anterior to
ft´´
, ω
2
(28) posterior, dorsally inserted.
Leg III (
Fig. 13
). Femur L=
69 µm
, genu L=
29 µm
, tibia L=
69 µm
, tarsus L=
78 µm
. Solenidium σ (67) apical, φ (38) pre-apical.
FIGURES 5–10
.
Pergalumna ekaterinae
sp
.
nov
.
5. Prodorsal setae; 6. Porose areas; 7. Right chelicera, antiaxial view; 8. Subcapitulum, ventral view; 9. Posterior región of ventral plate; 10. Right pteromorph, dorsal view. Escale bar 100 µm (Figs. 9,10) and 20 µm (Figs. 5,6,7,8).
Leg IV (
Fig. 14
). Femur L=
88 µm
, genu L=
39 µm
, tibia L=
78 µm
, tarsus L=
98 µm
. Solenidium φ (104) dorsal, with a thickening in first quarter.
Type material.
Holotype
(male) mounted on slide.
20/03/2016
,
México
,
Veracruz
,
Estación de Biología Tropical
,
Los Tuxtlas
, sample of soil and litter,
L. Villagomez
, col
.
three males
paratypes
and four female
paratypes
on slides with same data (catalog number #1557)
.
Five
larvae, seven protonymphs, five deutonymphs and eight tritonymphs extracted from cultures and mounted on slides
14/05/2018
(#1558) and
20 more adult
paratypes
from the same locality with date
11/03/2017
(#1559) extracted from cultures are deposited in 75% ethanol
.
This
material is deposited in the collection of
Collembola
de
México
y
Ácaros Edáficos of
Laboratory
of Ecology and systematic of
Microarthropods
,
Faculty of Sciences
,
UNAM
.
Aditionally five males
paratypes
with data
20/03/2016
,
México
,
Veracruz
,
Estación de Biología Tropical
,
Los Tuxtlas
, sample of soil and litter,
L. Villagomez
, col. is deposited in
Colección Nacional de Ácaros
(
CNAC
),
Instituto
de Biología
,
UNAM
.
México
, with catalog number
CNAC
011248
to
CNAC
011252
.
FIGURES 11–12
.
Pergalumna ekaterinae
sp
.
nov
.
11. Right leg I, antiaxial view; 12. Right leg II, paraxial view. Escale bar 20 µm.
FIGURES 13–14
.
Pergalumna ekaterinae
sp
.
nov
.
13. Left leg III, paraxial view; 14. Right leg IV, antiaxial view. Escale bar 20 µm.
Etymology
. This species is named in honor of Dr. Ekaterina A. Sidorchuk (Russian Academy of Sciences, Paleontological Institute) for her remarkable and enthusiastic contribution to the knowledge of fossil and living oribatid mites, she unfortunately lost her life in an accident. The epithet is a noun in genitive according to the International Code of Zoological Nomenclature article 31.1.2.