First report of Monoeca in Argentina, with description of two new species (Hymenoptera: Apidae)
Author
Torretta, Juan Pablo
Cátedra de Botánica General, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C 1417 DSE, Buenos Aires, Argentina (torretta @ agro. uba. ar). & Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina.
Author
Roig-Alsina, Arturo
Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina. & Museo Argentino de Ciencias Naturales “ Bernardino Rivadavia ”, Av. A. Gallardo 470, C 1405 D- JR, Buenos Aires, Argentina (arturo @ macn. gov. ar).
text
Journal of Melittology
2016
2016-03-04
2016
59
1
12
http://dx.doi.org/10.17161/jom.v0i59.5031
journal article
10.17161/jom.v0i59.5031
2325-4467
13145888
urn:lsid:zoobank.org:pub:164B4E3B-D34B-4ED1-9AD5-32E8010B46C1
Monoeca armata
Torretta & Roig-Alsina
,
new species
ZooBank:
urn:lsid:zoobank.org:act:
F2146668-13AF-4FA1-88ED-B8F63E90DAEF
(
Figs. 3–8
,
10, 11
,
14, 15, 16
)
DIAGNOSIS: Both sexes of
M
.
armata
run to
M
.
lanei
(Moure)
in the key to Brazilian species of
Monoeca
by
Aguiar (2012)
, due to the dark coloration of the integument, the infumate wings, and the polished, sparsely punctate
T
2. Comparing the structures of male
M
.
armata
to those of
M
.
lanei
(
Michener & Moure, 1957
: their figures 43–45), the terminal sterna and genitalia are strikingly different. Since females of
M
.
lanei
are not known (
Aguiar, 2012
), some peculiar structures of
M
.
armata
such as the pointed pronotal lobe, the carinate dorsolateral angle of the pronotum, and the strong, short carina on the posterior surface of the hind femur, could not be compared. These features are not mentioned in the descriptions of any of the other known species of
Monoeca
. From the only two species of
Monoeca
not occurring in
Brazil
, the Mexican and Central American
M
.
mexicana
and
M
.
pyropyga
, this new species can be separated from the former by the pointed pronotal lobe and from the latter by the lack of fulvous pilosity. The sterna and genital capsule of
M
.
armata
are diagnostic for the species: the S7 has a median apical digitiform projection, which is keeled ventrally and is as long as half the length of the sternum (
Figs. 14, 15
); the S8 has two free apical points, which are as long as one fifth of the disc of the sternum, and have acute apices (
Fig. 16
); the genital capsule is characterized by the broad dorsal branch of the penis valve and by the strong dorsal lobe of the gonocoxite (
Figs. 10, 11
). The apically projected hind basitarsus of the male is a diagnostic feature of this species (
Fig. 7
).
Figures 10–13.
Male genitalia of species of
Monoeca
Lepeletier & Audinet-Serville
from Argentina (scale bars = 0.2 mm).
10.
Ventral view,
Monoeca armata
,
new species
, holotype.
11.
Dorsal view,
M
.
armata
.
12.
Ventral view,
M
.
pulchella
,
new species
, holotype.
13.
Dorsal view,
M
.
pulchella
.
DESCRIPTION:
Holotype
♂
:
Total
body length: 9.1 (range: 8.7–9.6) mm; maximum head width:
2.9 mm
(range: 2.5–2.9); forewing length (including tegula):
8.3 mm
(range: 7.7–8.6) (n=12).
Integument
mostly black (brown in some
paratypes
).
Legs
brown (brownish orange in some
paratypes
).
Tegulae
brown, wing membrane brown, veins and stigma brownish orange (
Fig. 3
).
Spurs
of fore and mid-tibiae brown, of hind tibia black.
Metasomal
sterna brown.
Labrum
with plumose, brown hairs.
Clypeus
with simple, long (2x
DF
) hairs on disc, lateral areas with decumbent, plumose, white hairs.
Paraocular area
and frons with erect, plumose, white hairs.
Vertex
with erect, plumose (1.5–2x
DF
), brownish hairs.
Gena
with adpressed, short, white hairs intermingled with long (2–3x
DF
), plumose, white hairs.
Pubescence
of pronotum, scutum, scutellum, propodeum, and metanotum dark brown.
Mesopleuron
with long, plumose (2–3x
DF
), brown hairs.
Legs
with brown hairs, mixed with yellowish hairs on middle tarsus, and on apex of tibia, and tarsus of hind legs (
Fig. 8
).
T1
mostly glabrous, with few simple hairs on lateral portions.
T2
–
T4
covered with decumbent, plumose (1.5–2.0x
DF
), black hairs.
T5
and
T6
with abundant, plumose hairs (2.5–3.5x
DF
), intermingled with few white hairs at sides.
T7
with pygidial plate covered with adpressed short hairs. S2–S5 with dense bands of plumose, and long, simple hairs (
Fig. 4
).
Clypeus
with coarse, dense punctures, except smooth and shiny apical band and median longitudinal band.
Supraclypeal area
smooth and shiny.
Paraocular area
with sparse (4 pd), fine punctures; area surrounding ocelli smooth and shiny.
Frons
with coarse, dense punctures.
Scutum
, scutellum, and pleura with dense (1 dp) and coarse (smaller than on clypeus) punctures.
Metanotum
and propodeum with very sparse and weak punctures, metaposnotum smooth and shiny.
T1
smooth and shiny, with few, very fine punctures on anterior vertical area.
T2
–
T4
with dense, fine punctures, except median area glabrous and shiny.
T5
and
T6
with punctures sparser and coarser than on
T2
–
T4
.
Head
wider than long (1.00:0.78).
Eye
with inner orbits slightly sinuate and convergent below.
Proportion
of scape, pedicel, and first three flagellomeres 2.54:0.77:1.00:0.61:0.77.
Labrum
wider than long (1.00:0.60).
Clypeus
slightly protuberant (0.30x width of eye).
Supraclypeal area
elevated.
Median
sulcus (2x
DF
) present on upper frons.
Pronotal
lobe pointed in frontal view.
Dorsolateral
margin of pronotum shortly carinate (3x
DF
).
Scutellum
with weak longitudinal carina.
Apex
of hind basitarsus ending in strong tooth. S7, S8, and genitalia as in figures 10, 11, and 14–16).
♀
:
Total
body length:
9.8–11.8 mm
; maximum head width:
4.1–4.3 mm
; forewing length (including tegula):
9.2–10.2 mm
(n=5).
Integument
mostly black.
Head
black except for brown flagellum.
Mesosoma
and legs black except posterior surface of hind tibia and basitarsus brown.
Tegulae
dark brown, wing membrane dark infumate, veins and stigma dark brown.
Spurs
of tibiae brown.
Metasoma
black except
T1
–
T4
with translucent brownish orange apical margins.
Pubescence
mostly black except as noted below.
Labrum
with numerous decumbent, plumose (1.5x
DF
) hairs.
Lateral
portions of clypeus with shorter (0.5–0.7x
DF
), plumose hairs and disc of clypeus with longer (1.5–3x
DF
), simple hairs.
Paraocular area
, frons, and vertex with short (0.4– 0.5x
DF
), plumose hairs, those on vertex intermixed with longer (0.5–1x
DF
), simple hairs.
Gena
with decumbent white hairs, intermingled with scattered longer (0.5–2x
DF
) white (and black) simple hairs.
Scutum
and scutellum with very short (0.1–0.2x
DF
), plumose hairs intermingled with scattered longer (0.5–0.7x DF, a few up to 3x), simple hairs.
Metanotum
with very short (0.1–0.2x
DF
), plumose hairs, and longer hairs (0.3–0.4x
DF
) on lateral areas.
Lateral
areas of propodeum with plumose (0.5–1x
DF
) hairs.
Mesopleuron
with plumose (0.8–1.0x
DF
) hairs on upper third, and those on lower third with hooked setae (1.5–2x
DF
).
Ventral
areas of mesosoma with shorter (0.5–1x
DF
), dark brown, hooked setae.
Coxae
and trochanthers with dark brown, hooked setae.
Foreleg
with simple and plumose orange hairs on distal tarsomeres.
Ventral area
of mid-basitarsus with long (1.5–2x
DF
), orange hairs, mixed with black hairs, and plumose (and simple), shorter (0.3–1x
DF
), orange hairs on distal tarsomeres.
Hind
leg with scopal hairs on hind tibia and basitarsus pale yellow, abundant, long (4–7x DF, a few up to 10x) hairs, but basal area of tibia with hairs black, and in some
paratypes
distal hairs of basitarsus also black; distal tarsomeres with orange hairs.
T1
mostly glabrous, with few simple hairs on lateral portions.
T2
–
T4
covered with decumbent, plumose (1.5–2x
DF
) hairs.
T2
and
T3
with glabrous median area.
T5
with abundant, long (2.5–3.5x
DF
), plumose hairs intermingled with simple hairs, pale yellow laterally, or entirely black in some
paratypes
.
T6
with plumose hairs surrounding pygidial plate. S2–S5 with abundant, orange, hooked setae. S5 covered with long (3–4x
DF
), plumose, orange hairs. S6 covered with adpressed, short, orange hairs.
Sculpture
similar to that of male.
Head
wider than long (1.00:0.80).
Eye
with inner orbit slightly sinuate and convergent below.
Proportion
of scape, pedicel, and first three flagellomeres 2.33:0.61:1.00:0.50:0.61.
Labrum
wider than long (1.00:0.60).
Clypeus
protuberant (0.50x width of eye).
Supraclypeal area
elevated (in some individuals with very weak longitudinal carina [1.5–2.0x DF] on interantennal area).
Medial
sulcus (2.0x
DF
) on upper frons.
Pronotal
lobe pointed in frontal view (
Fig. 5
).
Dorsolateral
angle of pronotum carinate (3.0x
DF
).
Scutellum
with weak longitudinal carina.
Apex
of posterior surface of hind femur with arcuate, strong, short (2.0–2.5x
DF
) carina (
Fig. 6
).
T6
without wax-extruding area at base.
Figures 14–18.
Hidden sterna of species of
Monoeca
Lepeletier & Audinet-Serville
from Argentina (scale bars = 0.2 mm).
14.
Ventral view of S7 of
Monoeca armata
,
new species
, holotype.
15.
Lateral view of S7 of
M
.
armata
.
16.
Ventral view of S8 of
M
.
armata
.
17.
Ventral view of S7 of
M
.
pulchella
,
new species
, holotype.
18.
Ventral view of S8 of
M
.
pulchella
, with disc largely damaged.
HOLOTYPE
:
♂
,
ARGENTINA
,
Misiones
,
San Pedro
,
Reserva Esmeralda
,
15-XII-2011
, col.
L. Alvarez
(
MACN
).
PARATYPES
:
ARGENTINA
:
Misiones
:
1♀
,
San Ignacio
,
Parque Provincial Teyú Cuaré
,
5-XII-2012
, col.
H.J. Marrero
(on flowers of
Heteropterys intermedia
) (
FAUBA
)
;
1♀
, San Ignacio,
30-XI-2015
, col.
J.P. Torretta
(on flowers of
Heteropterys intermedia
) (
FAUBA
)
;
1♀
, Iguazú, Parque Nacional Iguazú,
6-XII-2012
, col.
J.P. Torretta
(on flowers of
Mascagnia divaricata
(Kunth) Nied.
) (
FAUBA
)
;
1♀
, Iguazú, Parque Nacional Iguazú,
12- XII-2008
, col.
Zamudio
,
Colleselli
&
Gomez de Olivera
(
MLP
)
;
1♂
, San Pedro, Reserva Esmeralda,
14-XII-2011
, col.
L. Alvarez
&
D. Aquino
(
MLP
)
;
4♀♀
, Guaraní,
El Soberbio
,
19-XII-2013
, col.
J.P. Torretta
(on flowers of
Heteropterys intermedia
) (
MACN
,
FAUBA
)
;
1♀
, Montecarlo,
29-XI-2014
, col.
J.P. Torretta
,
N. Gomiz
&
S.S. Aliscioni
(on flowers of
Heteropterys intermedia
) (
MACN
)
;
34♂♂
,
Bernardo de Irigoyen
,
5-XII-1951
, col.
A. Willink
&
F. Monrós
(
IFML
)
;
1♀
,
1♂
,
Pto. Bemberg
, no date, col.
K. Hayward
(
MACN
)
.
ETYMOLOGY: The specific epithet refers to the presence of a strong apical tooth on the hind basitarsus of the male.
SCOPAL
POLLEN
LOADS
: In
three females
in which pollen scopal loads were analyzed the loads contained 100% of pollen of
H
.
intermedia
.