Kodaianella mua, Constant & Pham, 2024

Constant, Jérôme & Pham, Hong Thai, 2024, Sixteen issid planthopper species in one day in Dong Son-Ky Thuong Nature Reserve in North Vietnam: Eight new species, one new genus and additional new records (Hemiptera: Fulgoromorpha: Issidae), European Journal of Taxonomy 919 (1), pp. 1-87 : 47-51

Kodaianella mua sp. nov.

urn:lsid:zoobank.org:act:5BECEAE4-B7C2-4138-BC82-F16E0D4A0B07

Figs 1 , 2A , 24–25

Diagnosis

Kodaianella mua sp. nov. can be recognized by

(1) the short gonostyli, mostly developed vertically (about 1.7 times as high as long in lateral view) and without triangular projection on anterodorsal margin at base of capitulum in lateral view (G, ca – Fig. 25A );

(2) the aedeagus with pair of lateroventral processes shaped as rather short ventral hooks directed mesoanteriorly, rather robust basally then tapering into acute point after half-length (lvp – Fig. 25G– I );

(3) the lateral lobes of periandrium with an apical hook pointing dorsad and an anteapical strong triangular tooth directed dorsad (ll – Fig. 25E–G ).

Differential diagnosis

Only one other species, K. furcata , shares the gonostyli without triangular projection on anterodorsal margin at base of capitulum in lateral view but it can be easily separated from K. mua sp. nov. by the ventral hooks of the aedeagus which are very elongate and furcate in K. furcata ( Chang et al. 2020: figs 12–13) as opposed to the short simple hooks in K. mua .

Etymology

The species epithet ‘mua’ is the Vietnamese word for ‘rain’ and refers to the heavy rains which prevented our team from collecting in Dong Son-Ky Thuong Nature Reserve for two days. It is used as a noun in apposition.

Type material

Holotype

VIETNAM • ♂ (dissected – Figs 2A , 24–25 ); Quang Ninh Province, Dong Son-Ky Thuong Nature Reserve ; 21°08′29″ N, 107°04′53″ E; 27 Aug. 2022; 550 m a.s.l.; secondary forest; GTI Project; J. Constant, J. Bresseel and L. Semeraro leg.; I.G.: 34.518; RBINS.

Description

MEASUREMENTS AND RATIOS. LT: ♂ (n = 1): 5.7 mm; LT/BB = 1.7; LTg/BTg = 1.60; LW/BW = 1.36; BV/ LV = 2.5; LF/BF = 0.64.

HEAD ( Fig. 24A–D ). Vertex distinctly broader than long in midline but slightly narrower in middle than on sides, brown with margins slightly carinate; anterior margin convex, posterior one concave and lateral subparallel; disc shallowly concave. Side of head brown with pale yellowish line at mid-height from eye to anterior margin. Frons about 1.6 times as wide as long, brown with curved transverse yellowish narrow line, and a darker area along lateral margins, wider along lateroventral angle; row of small yellowish tubercles parallel to lateral margins, two rows along dorsal margin; strong median carina in dorsal half; ventrolateral angle carinate and projecting anteriorly, forming angular projection in lateral view. Clypeus brown, darker apically and elevated medially but not carinate. Labium brown with last segment longer than broad, and shorter than penultimate. Scape short, ring-shaped, black; pedicel bulbous, brown.

THORAX ( Fig. 24A, C ). Brown. Pronotum rather short, 0.6 times as long as mesonotum in midline; median carina obsolete, with one small, impressed point on each side and some faint tubercles along posterior margin; anterior and posterior margins weakly carinate, disc weakly concave; posterior margin bisinuate; paranotal lobes brown turning to yellowish behind eye. Mesonotum smooth, with weak carina parallel to anterior margin; posterior portion of disc and scutellum slightly elevated. Tegulae yellowish brown.

TEGMINA ( Fig. 24A–C ). Moderately convex; brown with three darker area: one near base, broad transverse band at midlength, and in distal portion; widest in distal portion with apical margin obliquely truncate and broadly rounded; costal margin slightly reflexed in basal half; distinct hump in fork ScP+RA–RP. Venation: ScP+R forked near base; MP forked slightly beyond basal ⅓; CuA very long, forked at about ¾ of tegmen length; CuP reaching apicosutural angle; Pcu weakly visible in distal portion, fused with A 1 at about midlength of clavus; A 1 well marked; Pcu+A 1 moderately keeled; continuous row of aligned cross-veins joining main veins, parallel to apical margin.

HIND WINGS ( Fig. 24E ). Dark brown with basicostal portion paler, trilobed, with veins darker, slightly shorter than tegmina. ScP-R-MP-Cu lobe more than twice as broad as Pcu-A 1, even broader than combined lobe Pcu-A 1 + lobe A 2; A 2 lobe with anterior and posterior margins subparallel and distinctly surpassing half-length of Pcu-A1 lobe; Pcu single, subdistally anastomising with 2-branched A 1; A 2 simple.

LEGS ( Fig. 24A–D ). Moderately elongate and slender, brown with femora and metatibiae darker, base of metatibiae shortly yellowish. Metatibiae with 2 lateral spines in apical ⅓ and 7 apical spines. Metatibiotarsal formula: (2) 7 / 9 / 2.

MALE TERMINALIA. Pygofer (Py – Fig. 25A–D ) in lateral view about 3.1 times as high as long and with anterior and posterior margins subparallel, moderately curved in dorsal half, sinuate in ventral half; in caudal view subrectangular, about 1.7 times as high as wide. Gonostyli (G – Fig. 25A, C–D ) about 1.7 times as high as long in lateral view, with anterodorsal margin roundly, evenly emarginate, posterior margin moderately sinuate, broadly rounded in ventral portion, and ventral margin broadly rounded; mostly vertical in caudal view with capitulum projecting dorsomesad; capitulum (ca) elongate and with neck rather wide in lateral view, distal portion anteroposteriorly laminate and subcrescent-shaped in caudal view ( Fig. 25C ). Anal tube (An – Fig. 25A–D ) elongate and dorsoventrally flattened; in dorsal view 1.9 times as long in midline, as wide, with lateral margins diverging from base to basal ⅓, then distinctly bisinuate; apical margin distinctly bisinuate with lateral angles acute; anal opening in basal ¼; in lateral view moderately curved posteroventrad and with posterior margin distinctly emarginate. Aedeagus ( Fig. 25E–K ) moderately curved posterodorsad, moderately tapering towards apex in dorsal view and with pair of lateroventral processes (lvp) as rather short ventral hooks directed mesoanteriorly, rather robust basally then tapering into acute point after half-length; ventral lobe of periandrium (vl) broad, abruptly narrowing at level of ventral hooks then slowly tapering to narrowly rounded apex; lateral lobes of periandrium (ll) with triangular subapical tooth directed posterodorsad and apical tooth curved dorsad.

Biology

Kodaianella mua sp. nov. was collected in August on lower vegetation and bushes, in moist evergreen tropical forest at about 550 m in altitude ( Fig. 1B , 2A ).

Distribution

Vietnam: Quang Ninh Province, Dong Son-Ky Thuong Nature Reserve ( Fig. 1A ).

Figures

Fig. 1. Dong Son-Ky Thuong Nature Reserve. A. Topographic map. B. Sampled habitat.

Fig. 2. Issidae Spinola, 1839 in nature in Dong Son-Ky Thuong Nature Reserve. A. Kodaianella mua sp. nov. B. Longieusarima lunulia Wang, Bourgoin & Zhang, 2017. C–D. Rostrolatum curviceps sp. nov. E. Fortunia sp., nymph. F. Hemisphaerius bresseeli sp. nov. G. Maculergithus luteomaculatus (Constant & Pham, 2016). H. Neogergithoides scapularis sp. nov.

Fig. 24. Kodaianella mua sp. nov., dissected holotype, ♂ (RBINS). A. Habitus, dorsal view. B. Habitus, ventral view. C. Habitus, lateral view. D. Habitus, perpendicular view of frons. E. Right hind wing.

Fig. 25. Kodaianella mua sp. nov., holotype, ♂ (RBINS), terminalia. A–D. Pygofer, anal tube and gonostyli. A. Lateral view. B. Dorsal view. C. Caudal view. D. Laterocaudal view. E–K. Aedeagus and connective. E. Left lateral view. F. Left dorsolateral view. G. Left lateroventral view. H. Caudal view. I. Ventral view. J. Anterodorsal view. K. Dorsal view. Abbreviations: see Material and methods.