Exphora bourgoini Junkiert & Walczak, 2021

Exphora bourgoini Junkiert & Walczak View in CoL sp. nov.

( Figs 1A View Fig , 2A View Fig , 3A View Fig , 5–6 View Fig View Fig )

urn:lsid:zoobank.org:act:

Material examined

Holotype

1 ♂ / Exphora bourgoini sp. nov. / Junkiert & Walczak det. 2018 [red label]; Sahafanjana / Manambato / (Anove) [white label]; INSTITUT / SCIENTIFIQUE / MADAGASCAR [light green label]; Coll. R.I.Sc.N.B. [blue label] ( RBINS).

Paratypes

1 ♀ / Exphora bourgoini sp. nov. / Junkiert & Walczak det. 2018 [red label]; Sahafanjana / Manambato / (Anove) [white label]; INSTITUT / SCIENTIFIQUE / MADAGASCAR [light green label]; Coll. R.I.Sc.N.B. [blue label] ( RBINS) .

1 ♀ / Exphora bourgoini sp. nov. / Junkiert & Walczak det. 2018 [red label]; H. Synave det. 1956 / EXPHORA GUÉRINII [sic!] Signoret (hand written); Sahafanjana / Manambato / (Anove) [white label]; INSTITUT / SCIENTIFIQUE / MADAGASCAR [light green label]; Coll. R.I.Sc.N.B. [blue label] ( RBINS).

Description

Body length 10.8 mm.

Head. Metope twice as long as wide, lateral margins slightly arched and extended laterally at 3/ 4 in its lower part, then narrowing to metopoclypeal suture. Dorsal margin of metope weakly arched but distinctly concave. Median keel distinct, running through metope and metopoclypeal suture ( Fig. 2A View Fig ). Metopoclypeal suture elongate (about 1/4 shorter than metope), triangular. Lateral keels present and distinct. In lateral view, metope is distinctly convex, whereas metopoclypeal suture almost straight but median keel in lateral view gently arches over surface of metopoclypeal suture, and it also protrudes above surface of metope, but in lateral view it is covered by also protruding lateral keels. Eyes round. Coryphe almost 1.5 times as wide as long (measured in the middle of the length), with anterior margin convex and distinctly angular and posterior margin distinctly arcuately concave.

Pronotum and mesonotum. Pronotum bluntly rounded anteriorly, distinctly concave posteriorly. Mesonotum weakly convex, with three parallel keels: median keel is in its anterior part joined to two slanting carina converging to each other almost at right angle and thus forming an arrow-shaped structure. Both edges of arrow are joined to two lateral keels.

Fore wings. Clavus elongate, reaching almost 2/3 of the wing length, of hyperpterism type. Costal area well developed with 11 or 12 cells between CA and Pc+CP; ScP+R short, separating; RA two-branched; RP with at least 7 terminals; MP separating before nodal line; MP1+2 separating before nodal line, after the third terminal, clearly forked at the same level as stigma; MP3+4 separating, before nodal line; MP4 single, MP3 short, separating before nodal line, after the first terminal. CuA forking before nodal line and before MP; 3–4 transverse veins connecting CuP and PCu+A1 (more often one, sometimes two connecting CuP and PCu before joining with A1 and two or three veins connecting CuP and PCu+A1). A1 running parallel to posterior margin of clavus. Cubital cell twice as long, or even more, than postcostal cell, radial cell and median cell. Radial cell sometimes separated by a transverse vein. C1 based well before C2–C5; C2 and C 4 in contact sharing MP margin. C1, C2, C3 and C4 of similar length, C5 about 2 times longer. Eighteen or nineteen apical cells. Stigma longitudinal and dark-brown, well visible, including 4 short veins running to edge of wing ( Fig. 3A View Fig ).

Hind wings. Well developed, 4/5 of the fore wings’ length. Hyaline with brown veins. Almost twice long as wide in midline (ratio length to width: 2.2–2.4). Eleven apical cells ( Fig. 3A View Fig ).

Legs. Prothoracic and mesothoracic legs: Femur about 2/3 of tibia length, irregular in cross-section, margins of femur covered with small bristles, inner margin bears small spines. Tibiae long and thin, trapezoidal in cross-section, margins covered with small bristles, lateral margins with double row of bristles (e.g., Fig. 4 View Fig ).

Metathoracic legs. Metafemur margins covered with small bristles. Metatibia twice as long as metafemur, triangular in cross-section with concave ventral side. Margins of metatibia covered with small, barely visible bristles. Lateral margin with four lateral spines, three of which are distinct and one is weakly visible. Metatibiotarsal formula 8/8/2.

Colouration. General colouration yellowish-brown, more contrastingly coloured than most species of this genus. Metope with keels distinctly red, between lateral and median keels red-brown stripes passing along the metope. Eyes slightly darker than background; ocelli with dark rim. Posterior margin of pronotum and mesonotum contoured by a distinct dark line, similar to all darkly marked convex keels on the mesonotum. Lateral margins of tergites of abdomen brown. Wings hyaline with brown veins. Femur and tibia colouration uniform-yellowishbrown, spines of metatibia brown, darker than tibia, the sharp end of the spike is black. Prothoracic legs darker than meso- and metathoracic legs.

Genitalia. Male. Pygofer with hind margin convex. Aedeagus s.l. narrow, falcate in lateral view. Ventral phallobase overreaching half-length of aedeagus. Each dorso-lateral phallobase lobe with one long apical finger-shaped process bearing very small denticles. Subapical process smaller and slightly curved. Ventral process (aedeagus s.s.) with inner part duck-head shaped, outer part elongated in distal part with finger-shaped apical process and smaller triangular subapical process ( Fig. 5A View Fig ). Anal tube rather robust, weakly narrowed basally and enlarged apically in dorsal view with two horn-like angles. Anal column elongate, about 0.5 times anal tube length ( Fig. 5B View Fig ). Gonostyle triangle-shaped with smooth roundish edges, lateral margin of gonostyle slightly concave; capitulum wide and folded, bearing subapical spiralling tooth on inner side ( Fig. 5C View Fig ).

Female. Endogonocoxal process well sclerotized with slightly rounded apex and delicate subapical indentation on the inner side. Gonoplac (third valvula) semi-circular in lateral view with dorsal margin slightly convoluted innerly ( Fig. 6A View Fig ). Median part of sternite VII sinuous at ventral side with distinct acute incision in the middle. Genitalia with anal tube relatively short, broadly rounded in dorsal view ( Fig. 6B View Fig ). Gonapophyses VIII (first valvula) almost triangular, strongly sclerotized and bearing three teeth on dorsal margin, and one relatively large tooth with smaller subapical tooth ( Fig. 6C View Fig ). Gonapophyses VIII not visible externally, covered by gonoplacs. Gonapophyses IX (second valvular) well developed, sclerotized with apical ends not confluent, bearing very small quite abundant spikes, acute at apex ( Fig. 6D View Fig ).

Measurements (in mm, females in parentheses). Body length: – (10.80); head width (with eyes): 1.84 (1.80– 1.97); metope length: 1.87 (2.02–2.08); metope width: 1.14 (1.22–1.25); metope length/metope width ratio: 1.64 (1.66–1.67); coryphe length: 0.38 (0.44–0.45); coryphe width: 0.77 (0.87–0.89); coryphe length/coryphe width ratio: 0.49 (0.50–0.51); fore wing length: 8.63 (8.64– 8.73); fore wing width: 4.23 (4.44); mesonotum length: 2.02 (1.94–2.13); mesonotum width: 1.95 (2.11–2.29).

Diagnosis. Exphora bourgoini sp. nov. can be distinguished from other species by the pattern of dark-brown longitudinal stigma including four short veins running to edge of wing, metope with wide brown stripes, horned anal tube, shape of style, aedeagus and its processes.

Etymology. The name of this new species is dedicated to professor Thierry Bourgoin, an excellent Fulgoromorphan specialist from the Institute of the Systematic Evolution and Biodiversity, National Museum of Natural History, Paris, France.

Distribution. Madagascar, Sahafanjana [ 16°32’28.9” S, 49°47’02.4” E] ( Fig. 7 View Fig ).