Stegana ( Oxyphortica ) maichouensis Sidorenko, 1998

Stegana ( Oxyphortica) maichouensis Sidorenko View in CoL

(Figures 2(e), 4(a), 5(f) and 7)

Stegana ( Oxyphortica) maichouensis Sidorenko, 1998: 289 View in CoL .

Diagnosis

Surstylus with two long prensisetae (one each basally and apically) ( Figure 7 View Figure 7 (a, b)); gonopods with three strongly sclerotized, suberect processes dorsoapically, the median bifurcate ( Figure 7 View Figure 7 (e)). The 8.4% interspecific genetic distance to S. ( O). triodonta sp. nov. is one of the smallest interspecific distances ascertained within this subgenus; see under that species.

Description

Clypeus brown. Palpus yellow. Mesoscutum yellow anteromedially, yellowish brown laterally and posteriorly ( Figure 4 View Figure 4 (a)). Scutellum yellowish brown, yellow at tip ( Figure 4 View Figure 4 (a)). Katepisternum yellow. Wing yellowish, brownish anterodistally (Figure 2 (e)). Abdominal tergites: 1st yellow; 2nd yellow submedially, with one brownish patch medially, dark brown on lateral and posterior margins; 3rd to 5th yellow on anterior margin, dark brown on posterior margins; 6th yellow medially, dark brown laterally ( Figure 5 View Figure 5 (f)). Male terminalia: Epandrium undeveloped on posterolateral corners, with 1.13, rcorb = 0.47–0.73, vb = 0.36–0.70, dcl = 0.34–0.52, presctl = 0.39–0.56, sctl = 1.10– 1.33, sterno = 0.71–0.95, orbito = 1.43–2.00, dcp = 0.20–0.32, sctlp = 0.80–0.93, C = 2.50– 3.27, 4c = 0.71–0.94, 4v = 1.77–2.39, 5x = 1.36–1.82, ac = 4.80–6.20, M = 0.50–0.70, C3F = 1.00.

Figure

2

.

Wing

(

same

in

male

and

female

)

.

(

a

)

Stegana

(

Oxyphortica

)

acutipenis

Xu

,

Gao

and

Chen

,

2007

;

(

b

)

S

.

(

O

.

)

adentata

Toda

and

Peng

,

1992

;

(

c

)

S

.

(

O

.

)

hirtipenis

Xu

,

Gao

and

Chen

,

2007

;

(

d

)

S

.

(

O

.

)

latipenis

Xu

,

Gao

and

Chen

,

2007

;

(

e

)

S

.

(

O

.

)

maichouensis

Sidorenko

,

1998

;

(

f

)

S

.

(

O

.

)

chuanjiangi

Zhang

and

Chen

,

sp

.

nov

.

;

(

g

)

S

.

(

O

.

)

dainuo

Wang

and

Chen

,

sp

.

nov

.

;

(

h

)

S

.

(

O

.

)

dawa

Zhang

and

Chen

,

sp

.

nov

.

dense

pubescence

and

setae

(

Figure

7

(

a

))

.

Cercus

lacking

pubescence

(

Figure

7

(

a

))

.

Surstylus

small

,

lobe-shaped

,

with

several

small

setae

distally

(

Figure

7

(

a

,

b

))

.

Parameres

absent

(

Figure

7

(

c

,

d

))

.

Aedeagus

strongly

broadened

mediolaterally

and

sclerotized

except

peristome

,

haired

along

peristome

(

Figure

7

(

c

,

d

))

.

Measurements

BL

=

2.67

–

2.93

mm

in

fi

ve

males

,

2.83

–

3.53

mm

in

fi

ve

females

,

ThL

=

1.30

–

1.47

mm

in

males

,

1.20

–

1.57

mm

in

females

,

WL

=

2.10

–

2.30

mm

in

males

,

2.07

–

2.60

mm

in

females

,

WW

=

0.97

–

1.07

mm

in

males

,

0.93

–

1.20

mm

in

females

,

arb

=

5

–

7

/

3

–

5

,

avd

=

0.67

–

0.87

,

adf

=

2.60

–

3.25

,

fl

w

=

2.00

–

2.80

,

FW

/

HW

=

0.36

–

0.47

,

ch

/

o

=

0.09

–

0.13

,

prorb

=

0.95

–

Specimens examined

China: nine males, two females ( SCAU, Nos. 121460–70), Menglun, Mengla , Yunnan, 21°41 ʹ N, 101°25 ʹ E, altitude 680 m, 6 September 2002, 17 April 2007, 10 April 2010, ex tree trunks and tussock, HW Chen, JJ Gao, YR Su; 23 males, 20 females ( five males, five females in KIZ, Nos. 0088127–36; 18 males, 15 females SCAU, 124670–702), Mengyuan, Mengla, Yunnan, 21° 47 ʹ 29 ʹ ’N, 101°22 ʹ 59 ʹ ’E, altitude 990 m, 6–7 August 2016, ex tree trunks and tussock, HW Chen, L Gong, YQ Liu GoogleMaps .

Distribution

China ( Yunnan); Vietnam.