Dolichopeza (Nesopeza) lipingensis Men, 2018
|
publication ID |
https://doi.org/ 10.2478/aemnp-2018-0050 |
|
publication LSID |
lsid:zoobank.org:pub:A4D7D0F9-FF6A-4374-804B-17750DDC774E |
|
persistent identifier |
https://treatment.plazi.org/id/9E0187B3-3D25-FFDC-3694-5C72FD000B5F |
|
treatment provided by |
Marcus |
|
scientific name |
Dolichopeza (Nesopeza) lipingensis Men |
| status |
sp. nov. |
Dolichopeza (Nesopeza) lipingensis Men View in CoL sp. nov.
( Figs 13, 14, 21 View Figs 13–21 , 72–79 View Figs 72–79 )
Type locality. Liping National Forest Park,Hanzhong, Shaanxi Province, China, 32°50′N, 106°36′E.
Type material. HOLOTYPE: J, CHINA: SHAANXI PROVINCE: Liping National Forest Park, Hanzhong, 12.vii.2015, coll. Guoxi Xue. PARATYPES. 2 JJ, same data as holotype.
Diagnosis. Generally yellowish-brown. Prescutum yellowish-brown with three yellow stripes. Wing with yellowish suffusion, stigma light brown. Leg with coxa and trochanter light yellowish-brown, femur yellowish-brown with apical 1/5 yellowish-white, tibia wholly yellowish- -white. Tergite nine with a pair of lateral processes and two median processes, the lateral process hook-shaped, heavily blackened, its inner margin with black extensions; the outer median process with V-shaped notch medially, densely covered with short setae; the inner median process cone-shaped, curved inward.
Description. Male. Length: body 8.8–9.0 mm, wing 9.0–9.2 mm, antenna 5.4–5.6 mm.
Head. Rostrum yellowish-brown. Nasus lacking. Antenna with scape, pedicel and first flagellomere light yellowish-brown, remaining flagellomeres brown. Palpus light yellowish-brown. Head light yellowish-brown, occiput with median region slightly darker in coloration.
Thorax. Pronotum wholly yellowish-brown ( Figs 13, 14 View Figs 13–21 ). Prescutum light yellowish-brown with three yellow stripes ( Fig. 13 View Figs 13–21 ). Scutum, scutellum and postnotum yellowish-brown ( Fig. 13 View Figs 13–21 ). Pleuron wholly yellowish- -brown ( Fig. 14 View Figs 13–21 ). Halter with stem light brown, knob slight darker in coloration. Leg with coxa and trochanter light yellowish-brown, femur yellowish-brown with narrowed dark tip, tibia yellowish-brown with apical 1/5 yellowish- -white, tarsus wholly yellowish-white. Wing yellowish with stigma light brown, color of cells c and sc same to the ground color; veins brown, Sc ending about opposite 2/3 of length of Rs, Rs relatively short, R 3 slightly curved, about twice as long as R 2+3, cell m 1 slightly longer than its petiolate, r-m slightly subequal in length to basal section of R
4+5
( Fig. 21 View Figs 13–21 ).
Abdomen yellowish-brown. Hypopygium brown. Tergite nine with pair of lateral processes and two median processes, lateral process hook-shaped, heavily blackened, its inner margin with black extensions; outer median process with V-shaped notch medially, densely covered with short setae; inner median process cone-shaped, curved inward ( Figs 72–75 View Figs 72–79 ). Outer gonostylus basally broad, narrowed to apex, with length-width ratio 2:1 ( Figs 73, 76 View Figs 72–79 ). Inner gonostylus with basal beak truncated, with apical beak hook-shaped, very sharp at end ( Figs 73, 76 View Figs 72–79 ). Sternite nine with two pairs of sclerotized planes equipped with many long setae ( Figs 72, 73 View Figs 72–79 ).
Semen pump with anterior immovable apodeme very extended laterally, narrowed anteriorly in dorsal view ( Figs 77, 79 View Figs 72–79 ). Compressor apodeme fan-shaped, relatively elongated ( Fig. 78 View Figs 72–79 ). Posterior immovable apodeme with two connected arms, forming V-shaped plane, laterally terminating in rounded terminal in dorsal view, slightly curved dorsally in lateral view; caudal margin of posterior immovable apodeme protruded medially, rounded at lateral angles ( Figs 77, 79 View Figs 72–79 ). Aedeagal guide very expanded apically ( Figs 77, 79 View Figs 72–79 ). Aedeagus thick in basal half, and then gradually narrowed to the end ( Figs 77, 79 View Figs 72–79 ).
Differential diagnosis. The new species is allied to the Indian species D. (N.) rahula Alexander, 1967 ( ALEXANDER 1967) by the venation of wing and the shape of processes on tergite nine. It can be separated from the latter by the outer gonostylus with length-width ratio 2:1 (with length-width ratio at least 4: 1 in D. (N.) rahula ), by the inner gonostylus with a hook-shaped beak and truncated basal beak (inner gonostylus without such beaks in D. (N.) rahula ).
Etymology. The specific name refers to the type locality of the new species, Liping County, Shaanxi; adjective.
Distribution. China: Shaanxi Province.
Discussion
The aedeagal guide (also named adminiculum), a strengthened portion of the intersegmental membrane between segments eight and nine, is functional as a support and guide for the intromittent organ ( ALEXANDER & BYERS 1981). It shows very high morphological diversity in shape, which offers an important tool for taxonomic study and phylogenetic analysis at different levels. Also, the position of aedeagal guide in genital chamber varies. For example, the base of aedeagal guide is connected with the anterior portion of semen pump as found in Dolichopeza , Tipula (Nobilotipula) ( FROMMER 1963) , and Tipula (Nippotipula) (unpublished results), or separated from the semen pump as observed in Ctenophora and Tipula (Yamatotipula) (MEN & HUANG 2014, MEN et al. 2015). The terminal of aedeagal guide is not connected with sternite nine, which was observed in Ctenophora and Tipula (Yamatotipula) , or lies on sternite nine, which was found in some species of Tipula (Vestiplex) , Tipula (Pterelachisus) , Tipula (Emodotipula) , and Dolichopeza (Oropeza) ( BYERS 1961, MEN 2015).
The apical portion of bursa copulatrix is not elongated or slightly elongated in species such as T. (Y.) nova , T. (Y.) triplex , and Nephrotoma macrocera ( FROMMER 1963, MEN et al. 2015). BYERS (1961) found that a large pouch joins the anterior end of bursa copulatrix, which is slightly far away from the attachment of spermatheca duct in subgenus Dolichopeza (Oropeza) . He defined it as functional spermatheca, and suspected that the three spermathecae are generally nonfunctional in Dolichopeza , perhaps also in other Tipulinae species, because the small size of these spermathecae and great length of spermatheca ducts may delay or hinder the transmission of sperm. In the present study, the anterior end of bursa copulatrix in two Dolichopeza (Nesopeza) species is very elongated and expanded. It may be functional as mentioned in Byers’ hypothesis. Research of fertilization mechanisms in Dolichopeza (Nesopeza) species needs to be carried out in the future.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
|
Kingdom |
|
|
Phylum |
|
|
Class |
|
|
Order |
|
|
Family |
|
|
Genus |