Chionomus banosensis ( Muir, 1926 ) Weglarz & Bartlett, 2020

Weglarz, Kathryn M. & Bartlett, Charles R, 2020, A revision of the planthopper genus Chionomus Fennah (Hemiptera: Fulgoroidea: Delphacidae), Zootaxa 4811 (1), pp. 1-63 : 15-16

Chionomus banosensis ( Muir, 1926) , new combination

( Figures 5 , 21 )

Delphacodes banosensis Muir, 1926: 31 .

Type Locality. Ecuador, Tungurahua Province, Banos .

Diagnosis. Body brunneous, dark, shining, with stramineous markings. Vertex quadrate; foveae of frons and vertex very dark. Carinae of the head distinct, yellow in color except for genal carinae and median carina of the vertex; antennae light brown. Pronotum entirely dark, paranota ivory.Armature of diaphragm posteriorly projecting, composed of two diverging but closely approximated lobes; parameres with apices Y-shaped, sinuate, with distinct secondary process on proximal edge at midpoint. Aedeagus tubular, enlarged at base, upwardly directed, with a row of scattered teeth on either side connecting at the aedeagal base; segment X with 2 processes.

Description. Color. Macropter. Body shining, dark, brunneous, with stramineous markings. Carinae of head (excluding genal carinae and median carinae of vertex) distinct, ochraceous to off-white in color, usually with a small amount brown at apex of carinae; median carinae of vertex and genal carinae concolorous with foveae. Antennae yellow, infuscate at joint of two segments. Pronotum dark, concolorous with body, paranota distinctly ivory. Mesonotum dark, median and lateral carinae obscure. Legs yellow; forewings hyaline, dark spot at apex of clavus not evident in holotype. Structure. Macropter. Carinae of vertex distinct, stem of Y-shaped carina obscure. In lateral view ( Figure 5c ), fastigium rounded. Carinae of frons and clypeus distinct ( Figure 5b ), frons subparallel, widest midway below compound eyes and frontoclypeal suture. Antennae with first segment subequal in length to second, segment II wider than segment I; 2nd segment with sparse setae surrounding sensory pits.

Thorax. Macropter. Carinae of mesonotum evident, median carina ending anterior to scutellum, lateral carinae faint, diverging posteriorly and ending anterior to hind margin.

Abdomen. Macropter. Specimen has been dissected. The abdomen, excluding the pygofer, appears to have been discarded thus, the abdomen was not observed.

Genitalia. Pygofer in caudal view ( Figure 5f ) nearly as wide as tall, rounded; dorsal margins raised, carinate. Opening to inner chamber trapezoidal, pointed ventrad. Armature of diaphragm triangular composed of 2 lobes, smooth, projecting caudad. Parameres, widest in basal third, basal angle strong, projecting, quadrate, dorsolaterally diverging; apices with inner and outer angles distinct, diverging, Y-shaped. Exterior lateral margin of parameres concave, interior margin convex with distinct median process. Aedeagus circular in cross-section, curved dorsad in distal 1/3 rd, with distinct widened base, tapering at apical 1/4 th; aedeagus bearing row of scattered teeth on both sides, beginning dorsally at proximal edge of gonopore and converging ventrally at base of aedeagus. Segment X quadrate, processes distinct, directed ventrad. Segment XI produced, about ½ length of segment X

Plant associations. None reported.

Distribution. Ecuador.

GenBank accession number. Material for molecular work was unavailable at the time of this study.

Remarks. This species is only known from the holotype. It is distinctive in the shape of its parameres, with a median interior projection, and the closely approximated bilobed armature of the diaphragm. It appears closely allied with C. gluciophilus , C. quadrispinosus , and C. dissipatus , dispite bearing only 2 processes on segment X, because of the similar coloration of pronotum and paranota.

Type material examined. Holotype [ BPBM]: Macropterous ♂, “Type 1148 [Handwritten, white card with hole punch containing genitalia embedded in balsam] // Banos, Or. / Ecuador / XII-28-1922 [Date Handwritten] // F.X. Williams / Collector // ♂ // Holotype [Red paper, vertically oriented, affixed to following label] // Delphacodes / banosensis / ♂ Type 1148 Muir [Handwritten, label with black border] // 855 [Handwritten]”

Figures

FIGURE 5. Habitus of Chionomus banosensis (holotype; terminalia in balsam); A. dorsal view, habitus; B. frontal view, habitus; C. lateral view, habitus; D. calcar; E. anal tube, right lateral view; F. pygofer, caudal view; G. hind tarsus, ventral view; H. paramere, widest view (right paramere from underside); I. aedeagus, left lateral view.

FIGURE 21. Line art of Chionomus banosensis terminalia, A. pygofer, caudal view, B. anal tube, left lateral view, C. aedeagus, left lateral view; D. left paramere, widest view.