Two new species of Oxyagrion Selys, 1876, with a description of five new larvae (Zygoptera: Coenagrionidae)

15 Pages·2000·2.8 MB·English

by  Costa, J M

Odcmatologica29(1): 1-15 March I. 2000
Twonew species ofOxyagrionSelys, 1876,
witha description of five newlarvae
(Zygoptera: Coenagrionidae)
J.M.Costa¹,,L.O. Irineu+De+Souza²andT.C.Santos¹
¹Departamento,de Entomologia,Museu Nacional, Universidade Federal doRiodeJaneiro,
QuintadaBoaVista,BR-20942 Riode Janeiro,RJ, Brasil
² UniversidadeFederal deMatoGrossodoSul, MS,Brasil
Received November 15, 1998/Revised and AcceptedJune 12, 1999
O.pseudocardinalesp.n.(holotype 6: Brazil.Minas Gerais. Fazenda daCachoeira
F.F. deSouza. 13-11-1990) and O.sulmatogrossensesp.n.(holotype 6\ Brazil. Mato
Grosso doSul.CampoGrande.CampusUFMS,24-XII-I997)aredescribedandillus-
trated.The larvae ofO.basale Selys, 1876; O.haematinum Selys, 1876; O.pavidum
Selys, 1876: O. santosi Martins. 1967 and O.sulinum Costa. 1978are described and
illustratedfor thefirst time.Keys areprovided fortheknown Oxyagrion spp.andfor
the known larvae.
INTRODUCTION
Nineteenspecies of Oxyagrion are known from the Neotropical region (COSTA,
1978. 1988; SANTOS, 1961)and 5 species are known from Mato Grosso and
Mato Grosso do Sul States: O. chapadense Costa, 1978; O. evanescens Calvert,
1909; O. impunctatum Calvert, 1909; O. microstigma Selys, 1876 and O.
pavidum Selys, 1876. Of the 19 species, 15 occur in Brazil andof theseonly
O. sulinumCosta, 1978 had not been recorded from Mato Grosso State.
The two new species we describe here belong to Oxyagrion because they
have red color patterns; lack postocular spots; black area on the headand on
mesoepisternum is absent; penis with double fold; females with mesoepisternal
fossae(except O. hempeli andO. microstigma) and with genital spine on 8th seg-
ment(except O. evanescens). Allmaterial, including typesare lodgedintheMuseu
Nacional. Rio de Janeiro.
2 J.M,Costa. L.O.IrineudeSouza& T.C.Santos
OXYAGRION PSEUDOCARDINALE SP. NOV.
Figures 1-6
Material.- Holotype 6 (No. 803):Brazil, MinasGerais, FazendadaCachoeira Francisco F.
deSouza(CachoeiraMariana). 13-11-1990,J.M.Costa&S. Marshallleg.
Etymology, - Anallusion to the projectingposteriorlobe ofprothorax as in Oxyagrion
cardinale.
MALE (Holotype). — Head reddish; postocular spots dark brown; anarrow
ring surrounding lateralocellus; I'1and2mlantennalsegments reddish [distal seg-
ments lacking). Labium yellow; labial cleft with sparse white pruinosity; posto-
cular area lacking black dots.
Thorax. — Prothorax light brown, medial part ofposterior lobe projecting
posteriorly, quadrangular shaped, not undulate(Figs 1,2a, 2b). Synthorax reddish,
red. Legs creamwithdark spots; tibialspines strong, asymmetric andblack; inter-
nal spines longer than the spacebetween them; decreasing in size toward tarsus;
external spines longer and as long as the space between them. Tarsi light, dark
rings about articulation areas; clawsblack, simple.
Wings. — Hyaline, petiolated toAc; arculus atsecondantenodalcrossvein; Cac
between two antenodals; 10 postnodals in forewings, 8 in hindwings; R, in the
forewings arising near the 5lh postnodal at 4"' postnodal in hindwings; 1R, in
forewings at 8lh postnodal; at 7"' postnodal in hindwings. Pterostigma yellowish
brown, similarly shaped in all wings, slightly oblique, covering less than one
Figs 1-6.Oxyagrionpseudocardinale(holotype 6): (I) prothorax,dorsal view; — (2a) posteriorlobe
ofprothorax,lateralview; — (2b) posterior lobeofprothorax, posteriorview; — (3) abdominalseg-
ment 10andanalappendages,lateral view; - (4) abdominalsegment 10andanal appendages,dorsal
view; — (5) penis,lateralview; — (6) penis,ventral view.
New Oxyagrionspecies andlarvae descriptions 3
cell. Forewings distinctly longer than hindwings.
Abdomen.— Abdominalsegments 3-7 black dorsally, increasing distally;
dorsum of segment 2 with a black semicircular spot; segments 8-10 red;
posterodorsal marginofabdominalsegment 10simple, apical margin witha short
incision.Cerci(Figs 3,4) dark brown,narrowedanddiverging distallyand shorter
thanabdominalsegment 10;paraproct (Fig.3) pale, shorterthancerci, basebroad.
Penis (Figs 5, 6) similarto O. impunctatum.
Measure ments(mm). - Totallenglhincludingappendages32; — forewings18; - hindwings
17; — anterior andposteriorpterostigma0.5 oncostal side and 1.0ongreater diagonal;- abdomen
27.
FEMALE unknown.
DIAGNOSIS. — Oxyagrion pseudocardinale has the medialportion ofthe poste-
riorlobeofthe prothorax projecting posteriorly as in O. cardinaleFraser, 1946,a
species ofwhichonly onefemalefromPeruhas beendescribed.Wedoubtthatthis
new species representsthe male sex ofO. cardinale.In O. cardinalethis lobe is
undulatewhile in O. pseudocardinale the lobe is not undulate.Thecharacters de-
scribed by FRASER (1946) and DE MARMELS (1984) for O. cardinaleleave
littledoubtthatour malerepresentsanew species.
OXYAGRION SULMATOGROSSENSE SP.NOV.
Figures7-14
Material. - Holotype6(No. 804) andParatype 3(No. 805): Brazil, MatoGrosso doSul.
CampoGrande,CampusofUFMS.24-XII-1997.J.A.S.Silvaleg.;- Allotype9(No. 806),samelocality.
18-11-1998, L.O. IrineudeSouza leg.;- I Paratype 9.same locality.10-11-1998, J.A.S.Silva leg.
Etymology.— In allusion tothe site ofcollection.
MALE(Holotype). — Head reddish; postocularspots dark brown; lsl and 2"d
antennal segments yellowish brown, remaining segments black. Labium yellow;
labial cleft large with intense white pruinosity; dorsum oflabiumwith a black
spot; postocular area with black dots.
Thorax. — Prothorax reddishbut laterally pale, markedwith black spots on
sutures. Synthorax reddish, with black dots(Fig, 14). Legs cream withdarkspots;
tibialspinesstrongandblack, aslong asthespacesbetweenthem.Tarsidarkbrown,
black rings aboutarticulationareas; clawsblack, simple.
Wings. — Hyaline, petiolated toAcor slightly beforeitinhindwings; arculus at
second antenodal crossvein or slightly distal to it; Cac near Is' antenodal; 11
postnodals in forewings, 9-10 postnodals in hindwings; R in forewings and
hindwings arising near 4lh postnodal crossveins; IR, in forewings and hind-
wings at 7th postnodal. Pterostigma yellowish brown, similarly shaped in all
wings slightly oblique, surmounting I cell.
Abdomen. — Abdominal segments 1-10 red dorsally with black rings on
articulations; dorsum ofsegment 2 with a black semicircular spot; dorsum of
4 J.M.Costa. L.O.IrineudeSouza&T.C.Santos
abdominal segment 10 (Figs 7, 8) with a pair ofposteriorly directed cornute
projections as in O. chapadense. Cerci dark brown, rounded at distalend and
slightly longer than abdominal segment 10; paraprocts (Figs 7, 8) pale, shorter
than cerci, its black tip incurved, base broad. Penis as in Figures 9 and 10.
Measurements (mm). - Totallengthincludingappendages35;— forewings2l; — hindwings
20; — anteriorand posteriorpterostigma0.5on external costal side and 1.0ongreater diagonal:
abdomen 28.
FEMALE(Allotype). — Head. — As inthe male, but labrumbluish laterally.
Thorax. — Mesoepisternalfossaerounded,impressed oneither sideofasmall
elevatedtubercle as inO. chapadense (Fig. 13).
Abdomen. — Abdominalsegments3-10black dorsally andreddish laterally;
Figs 7-14. Oxyagrionsulmatogrossense:(7) abdominalsegment 10and anal appendages,lateral view
(holotype); - (S)abdominal segment 10and anal appendages, dorsal view (hololype):— (9) penis,
lateral view(hololype); — (10) penis,ventral view (hololype):— (II)terminalabdominal segments,
lateral view (paralype female): — (12) terminal abdominalsegments, dorsal view(paratype female):
- (13) mesoepisternalfossae, dorsal view (allotype); - (14) thorax, lateral view (paratype female).
New Oxyagrionspecies andlarvae descriptions 5
segment 2 as in male; segment 9 with a blue T-shaped spot (Figs 11, 12).
Measurements (mm). — Total lengthincludingappendages30; — (brewings 18.5; —
hindwings 17.5; — anterior andposteriorpterostigma 0.5 on the costal side and 1.0 onthe greater
diagonal; — abdomen 24.
diagnosis. — Oxyagrion sulmatogrossense is includedin thebasale groupto-
gether withO.basale, O. chapadense, O. impunctatum andO. sulinumbecausethe
posterodorsal margin ofabdominal segment 10 has a pairofposteriorly directed
cornute projections.
KEY TO KNOWN NEW SPECIES
1 Dorsum of abdominal segment 10 produced to form 2 posteriorly directed horns (basale
group) 2
— Dorsum ofabdominal segment 10without horns 6
2 Dorsum ofabdominal segments black; distal segment ofpenis distinctly wider than width of
segment 2;terminal lobe(figs93-94-95, COSTA, 1978) ofpenis divided sulinum
— Dorsum ofabdominal segments with variable color;penis without the above combination 3
3 Dorsumofabdominal segments I-10red 4
— Dorsum ofabdominal segments 1-2black. 3-10 red 5
4 Dorsum face ofhead blood red. synthoraxwithout black dots iimpunctatum
— Dorsumfaceofhead notblood red: synthorax with black dots sulmatogrossense
5 Pterostigmaquadrangularshaped; cerci aslongas abdominalsegment 10; penislobeselongated
asinfigs69-70,COSTA. 1978 chapadense
— Pterostigmalozengeshaped;cerci longerthan abdominal segment 10;penis lobesasin figs73-74
COSTA. 1978 basale
6 Posteriorlobeofprothorax straight (Species notincludedin thiskey)
— Posterior lobe ofprothoraxsubquadrangularor quadrangularshaped 7
7 Posterior lobeofprothoraxsubquadrangular;thorax with antehumeraland humeralparts marked
by blue stripes; abdominalsegments 1-2 blue laterally; total length40 mm; 13 postnodalsin
forewingsand II inhindwings(Peru) (FRASER. 1946) cardinale (9)
— Posterior lobeofprothorax quadrangular;without bluestripeson thorax; total length.32 mm; 18
postnodalsin forewingsand 17in hindwings;Minas Gerais State, Brazil .... pseudocardinale (<3)
LARVA OF OXYAGRIONBASALE SELYS, 1876
Figures 15-22
Material.- 1 $,Brazil. EspiritoSanto.SantaTeresa.RioTimbui. I7-VII-I985,(emergedon I-
VII1-1985). N.D. Santos. L.F.R.Netto &J.Ulisses leg.; 1 6.sameplace,date andleg, (emergedon5-
VIII-1985); I 6.sameplace,date andleg.(emergedon20-VII-1985); I <J.EspiritoSanto,SantaTeresa.
Penha. I8-V1I-1985. sameleg.(emergedon 11-VIII-1985);I 6.SantaTeresa.Penha(increek). I8-VII-
1985, sameleg.(emergedon Il-VIII-1985).
Head widerthan long, lightbrown dorsally, dark brown on postocular area,
thisarea withblack dots;cephalic lobeswithnarrowcleftinventralview; 20spines
onrearofhead(Fig. 15);ventralsurfaceoftheheadpale;2 largeand4shortspines
(Fig. 15) on inferiorborderofeyes near maxillae; antennae 7-segmented. the 21"1
6 J.M.Costa, L.O. IrineudeSouza&T.C.Santos
more robust and slightly longer than 3rd; labium (Fig. 16) triangular longer
than wide with 3 primary mental setae and I secondary seta; lateralborder of
prementum with 7 spiniform setae on distal end, distal margin of prementum
feebly crenulated, labial palp (Figs 16, 17) with 5 setae; anteriorborderof the
palps with 3 triangular spines and 2-3 denticles proximal to movable hook;
inferior border ofpalps feebly crenulated; labrum semicircular with setae on
distal margin.
Thorax. — Darkbrown;lateralmarginofprothorax with2 tubercles;synthorax
pale; legs short and slender with dark brown on articulations; femoraand tibiae
withspines; clawssimple. Anteriorandposterior wingpads sheathsextending over
the baseofabdominalsegment4.
Abdomen. — Tergites dark brown; sternites yellow. Dorsum of segments
7-10 with setae; distal borderofsegment 10 with row ofspines not interrupted
Figs 15-21. Larva ofOxyagrionbasale:(15) head, ventral face: — (16) labium, dorsalview; — (17)
labial palps,internal face; — (18) terminal abdominal segments andanal appendages, female, lateral
view; —(19) terminalabdominalsegmentsandanalappendages,female, ventralview; —(20) termi-
nal abdominal segments and anal appendages,male, lateral view: — (21) terminalabdominalseg-
ments and anal appendages,male, ventral view; — (22) lateral caudal lamellae, lateral view.
New Oxyagrionspecies andlarvae descriptions 7
at basal area of the cerci (Fig. 20). Ventral view of segment 9 as in Figure 21.
Caudal appendages. — Cerci short, in lateral view almost globe-shaped.
Caudal lamellaepale, leaf-shaped (Fig. 22), withouttransverse suture and not
pigmented; lateraland dorsal carina of caudal lamellae with short spines on
proximal half, this as wide as distal half; principal tracheae almost straight
without secondary tracheae.
Measurements (mm), —Total length(excludingappendages)12.7; —widthofhead 3.5; —
lengthofhead 1.9; - lengthoflabium 2.6; - width oflabium 2.0; — antennae: segment I 0.31;
segment II0.50; segment III0.64; segment IV 0.44; segment V0.26: segment VI0.20; segmentVII
0.10; — lengthofcaudal lamella6.6; - widthoflateralcaudal lamella 1.25.
FEMALE. — Similarto male. Spines ofsegment9 long; ovipositor reaching the
distalendofsegment 10(Figs 18, 19).
Measurements (mm). —Total length(excludingappendages) 12.7; - widthofhead3.1; —
lengthofhead 1.6; — lengthoflabium 2.2; - width oflabium 2.1; — antennae: segment 1 0.28;
segment II0.48; segment III 0.60; segment IV 0.44; segment V0.23; segmentVI0.20; segment VII
0,10; - lengthofcaudal lamella 6.0; — width oflateral caudal lamella 1.2.
LARVA OF OXYAGRION HAEMATINUM SELYS, 1876
Figures 23-30
Material. — 9 <5 (5 exuviae)and 7 V (5 exuviae), Brazil. Minas Gerais. SerradoCaraqa.
Riacho dosCascudos. XII-1979.N.D.Santos &L.F.R. Nettoleg.
Head wider than long, light brown dorsally; cephalic lobes with narrow
cleft inventral view; more than 20 shortspines onrear ofhead(Fig. 23); ventral
surface of the head pale; 2 large spines and 8 short spines (Fig. 23) on inferior
border ofeyes near maxillae;antennae 7-segmented the 3rd is twice as long as
2nd segment; labiumtriangular shaped (Fig. 24) longer than wide with 4 primary
mentalsetae; lateral border ofprementum with 8 or 9 spiniform setae on distal
end; distal margin of prementum feebly crenulated; labial palp with 6 setae
(Figs 24, 25); anteriorborderofthe palps with 3triangular spines and a row of
poorly defineddenticles proximal to movable hook; inferior border of palps
feebly crenulated (Fig. 25); labrum semicircular with setae on distal margin.
Thorax. — As in O.basale butwith prothorax smooth.
Abdomen. — As in O.basale but dorsumofsegments4-10withshortsetae;
distalborderofsegment 10(Fig. 26) as inO. basale.Ventral viewofsegment9as
in Figure 27.
Caudalappendages. — Cerci short,inlateralviewconical.Caudal lamellae(Fig.
30) pale, leaf-shaped, with transversal suture and discontinuously pigmented; lat-
eraland dorsalcarinaofcaudal lamellaewithshortspines onproximal half,thisas
wide as distal half; principal tracheae almost straight; secondary tracheae thin.
In somespecimens there is a dark brown shading on middle of caudal lamellae.
Measurements (mm). - Total length(excludingcaudal lamellae) 173: - widthofhead 3.5;
— lengthofhead 1.9; — lengthoflabium 3.2; — widthoflabium2.7; —antennae:segment I0.36;
8 J.M.Costa, L.O.IrineudeSouza&T.C.Santos
segmentII0.58;segmentIII0.92;segmentIV0.56: segmentV0.32;segmentVI0.22: segmentVII0.12;
- lengthofmedian caudal lamella 5.4; - widthofmedian caudallamella 1.6: - widthoflateral
caudallamella 1.4: - lengthoflateralcaudallamella 5.4.
FEMALE. — Similarto male. Spines ofsegment9 long; ovipositor not reaching
the distalendof segment 10(Figs 28, 29).
Measurements (mm). - Total length(excludingappendages) 16.5; - widthofhead 3.3; —
lengthofhead 2.2; - lengthoflabium 3.3; - width oflabium 2.8; - antennae:segment I0.34;
segment II0,56; segment III0.88: segment IV0.48; segmentV0,30; segment VI 0.18: segment VII
0.12; — length ofmedian caudal lamella 5.4; — width ofmedian caudal lamella 1.6; - width of
lateral caudal lamella 1.4; - length oflateral caudal lamella5.4.
Figs23-30.Larva ofOxyagrionhaematinum:(23) head, ventralface; — (24) labium, dorsal view; —
(25) labial palps, internal face: — (26) terminal abdominal segments and anal appendages, male,
lateral view: — (27) terminalabdominalsegments andanal appendages,male, ventralview; — (28)
terminalabdominalsegmentsandanal appendages,female, lateral view; - (29) terminal abdominal
segments andanal appendages,female,ventral view; — (30) lateral caudal lamellae, lateral view.
New Oxyagrionspecies and larvae descriptions 9
LARVA OF OXYAGRION PAVIDUM SELYS, 1876
Figures 31-36
Materia I. — I 6.Brazil. Rio deJaneiro. Vassouras, (creek neardowntown). 2I-I-I97I.N.D.
Santos& J.M.Costaleg.
Head slightly wider than long, light brown dorsally; cephalic lobesnotevi-
dent;more than 20 short spines on rear of head(Fig. 31); ventral surfaceofthe
head pale; 3 large spines followedby 6or 7 short spines (Fig. 31)on inferior
borderofeyesnear maxillae;antennae7-segmented, the2IKlmorerobustandslightly
shorter than 3rd; labium(Fig. 32) triangular shaped longer than wide with 2 pri-
mary mental setae and I secondary seta; lateralborder of prementum with 7-8
spiniform setae atdistalend; distal margin ofprementumfeebly crenulated;labial
palp (Figs 32, 33) with4setae;anteriorborderofthe palps with2 large triangular
spines followedby arow ofdenticles poorly definedproximal to movable hook;
inferiorborderofpalps feebly crenulated;labrumsemicircularwith setaeon distal
margin.
Thorax. — As inO. haematinum.
Abdomen.— Tergites light brown;sternitesyellow. Dorsum segments 1-10
withshortsetae; distalborderofsegment 10withrow ofshortspines interrupted at
baseofcerci (Fig. 35).
Caudalappendages. — Cerci short, inlateral view almostglobe-shaped. Caudal
lamellae(Fig. 36) pale, leaf-shaped, without transversal suture and lacking pig-
mentation,lateraland dorsalcarinaofcaudallamellaewith shortspines onproxi-
mal half, narrow at the distal half; principal tracheae almost straight, with a
few secondary tracheae. Ventral view ofsegment 9 as Figure 34.
Measurements (mm). —Totallength(excludingappendages) 12.0; —widthofhead 2.7: —
length ofhead 1.4; - length oflabium 1.9; — width of labium 1.45; antennae:segment I 0.26;
segmentII0,32; segmentHI0.44;segmentIV0.36; segmentV0.22; segmentVI0.16;segmentVII0.12;
— lengthofmedian caudallamella 5.7; — width ofmedian caudal lamella 0.9: — width oflateral
caudallamella0.8; - lengthoflateralcaudal lamella5.75.
LARVA OF OXYAGRION SANTOSI MARTINS, 1967
Figures 37-42
Material.— I 5 (emergedon 10-1-1980).Brazil, Sao Paulo, Parque Nacionalda Serra da
Bocaina, 24-XI-1979. N.D.Santos.J.M.Costa.S.M. Pereira&L.F.R. Netto.leg.
Head slightly wider thanlong, grayish brown dorsally; cephalic lobeswith a
narrow cleftinventralview; morethan 20spines onrear ofhead(Fig. 37); ventral
surface of headpale; I large spine followedby a row of minusculespines on infe-
rior border ofthe eyes near maxillae; antennae 7-segmented the 2nd more robust
andslightly shorterthan 3rd; labiumtriangular shaped (Fig. 38) longer than wide
with 3 primary mentalsetae and 2 secondary setae; lateralborder ofprementum
10 J.M.Costa,L.O. IrineudeSouza&T.C.Santos
with 7 spiniform setae on distal end; distal margin of prementum feebly
crenulated and prominent; labial palps with 5 setae; anterior border of the
palps with 3 triangular spines (Fig. 39) followed by a row ofpoorly defined
denticles proximal to movable hook; inferiorborderofpalps feebly crenulated;
labrum semicircularwith short setae on distal margin.
Thorax. — As inO. basalebut grayish brown; lateral marginofprothorax
Figs 31-36. Larva ofOxyagrionpavidum: (31) head, ventral view1; — (32) labium, dorsal view/; —
(33) labialpalps, internal face; — (34) terminal abdominalsegments andanal appendages,male,
ventral view; - (35) terminal abdominal segments and anal appendages,male. lateral view; — (36)
lateral caudallamellae,lateral view.
Figs37-42. LarvaofOxyagrionsantosi:(.37) head, ventral face: - (38)labium, dorsal view: - (39)
labialpalps,internal face; —(40) terminal abdominalsegments andanalappendages,female,ventral
view; — (41) terminal abdominal segments andanal appendages,female, lateral view; - (42) lateral
caudal lamellae, lateral view'.