Fescennia cornigera Stroiński, Bahder & Bartlett, 2025
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publication ID |
https://doi.org/10.11646/zootaxa.5729.1.3 |
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publication LSID |
lsid:zoobank.org:pub:4927DD2E-E95F-4BE0-AACA-DA010E3EC2FD |
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DOI |
https://doi.org/10.5281/zenodo.17907659 |
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persistent identifier |
https://treatment.plazi.org/id/038E8029-FF95-FF82-FF78-D47C0B32A38B |
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treatment provided by |
Plazi |
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scientific name |
Fescennia cornigera Stroiński, Bahder & Bartlett |
| status |
sp. nov. |
Fescennia cornigera Stroiński, Bahder & Bartlett sp. nov.
( Figs 23–28 View FIGURE 23 View FIGURE 24 View FIGURE 25 View FIGURE 26 View FIGURE 27 View FIGURE 28 )
Type Locality. Madagascar, Atsinanana Region , Parc Mitsinjo .
Diagnosis. Base color pale, irregular fuscous markings. Head in lateral view slightly conical, vertex weakly convex. In dorsal view, vertex broad, narrowed anteriorly. Pedicel of antenna bearing a peg-like process on dorsal margin. Eye with conspicuous horn’like callus on dorsal margin. Forewings with four fuscous bands in dorsal view. Medioventral process of pygofer slender, trifurcated and serrate. Aedeagus thick with narrow, arched with serrate projections.
Description. Color. Ground color varies from tan to white, head generally white, orange wash at ventral margin of genae, clypeus anterior margin white, lateral margins orange, mesonotum orange with fuscous wash (paler medially), forewings transluscent with yellow and fuscous mottling, fuscous band on lateral margins of abdomen, tergites orange ( Fig. 23 View FIGURE 23 ).
Structure. Head. Head subequal in width to pronotum. Vertex relatively broad, trapezoidal (about 2.9x wider posteriorly than long at midline). Anterior margin nearly truncate, posterior margin concave medially (almost straight); lateral margins weakly arcuate, subparallel, bearing two rows of sensorial pits, outer pits approximately twice as large as inner row ( Fig. 24 View FIGURE 24 ). In lateral view, head profile angled at fastigum, fastigium slightly projected, gently rounded from fastigium to frontoclypeal suture; vertex weakly convex. Gena with subantennal processes concave from beneath antenna to beneath eye (removed from ventral margin of eye). In frontal view, frons with lateral margins nearly parallel-sided (weakly constricted ventrally) bearing row of sensorial pits with smaller sensorial pits inset ( Fig. 24 View FIGURE 24 ). Antennal pedicel globular with flagellum at apex, without projections, bearing a peg-like sensory process dorsally.
Eye deeply emaginate at antenna, dorsal margin bearing horn-like callus; postero-apical margin without cuticular eminence ( Fig. 24 View FIGURE 24 ). Lateral oceelus just anterior to ventroapical margin of eye.
Thorax. Pronotum in dorsal view about as long at midlength as vertex. convex at anterior margin (between eyes), deeply concave at posterior margin, narrowest medially, tricarinate ( Fig. 24 View FIGURE 24 ). Mesonotum in dorsal view approximately 1.5x longer than wide at midpoint, tricarinate with median carina reaching scutellum, lateral carinae arising laterally, running dorsally, curving mesally at dorsal margin, obsolete in posterior 1/3 ( Fig. 24 View FIGURE 24 ). Hind leg with metatibio-tarsal formula 5 (fused at base)/5/5
Forewing ( Fig. 25 View FIGURE 25 ): branching pattern MP 1+2 5-branched; CuA 1a fused in short distance with branch MP 3+4; clavus with false veins (fold).
Male terminalia ( Figs. 26–28 View FIGURE 26 View FIGURE 27 View FIGURE 28 ). Pygofer in lateral view narrow with strongly sinuate anterior and posterior margins, narrowest medially, dorsocaudal margin expanded into rounded lobe ( Fig. 26 View FIGURE 26 ), medioventral process articulated, angled dorsad; in lateral view, relatively slender, bearing basal knob on dorsal surface, bifurcated near midlength and bearing a flattened, serrated secondary process arising on left lateral side; apical bifurcation with dorsal process arched, directed caudad, acuminate with dorsal and ventral margins serrulated; ventral process expanded proximally, then narrowed to acuminate, finely serrulated apex ( Fig. 26 View FIGURE 26 ). Gonostyli in lateral view broad, spatulate, ventral margin smoothly convex, apex rounded, dorsal margin irregularly sinuate, bearing low, founded dorsal process proximally, and distal hook-like process (apically sclerotized) ( Fig. 26 View FIGURE 26 ); in ventral view, gonostyli weakly asymmetrical, medial margins concave bearing a large elongated sclerotized process distal medial margin bearing low, rounded lobes ( Fig. 26 View FIGURE 26 ). Aedeagus with shaft simple, smoothly sinuate, nearly straight, expanded distally to appear club-like; endosoma asymmetrical, bearing four retrorse processes (each of these bifurcated); first (E1) arising subapically on dorsal margin, bifurcated near base, inner bifurcation (E1a) short, slender, curved; outer bifurcation (E1b) 4x as long as E1a, sinuate on inner margin, curved mesad, distal half serrated ( Figs 27 View FIGURE 27 , 28 View FIGURE 28 ); second process (E2) arising subapically on left lateral side, bifurcated proximally with dorsal process curved gently ventrad, slender, nearly reaching aedeagal base, ventral process a broad ventral lobe ( Fig. 27–28 View FIGURE 27 View FIGURE 28 ); third process arising subapically on right lateral side, angled ventrad, ventral margin serrated at apex ( Figs 27 View FIGURE 27 , 28 View FIGURE 28 ), fourth process (E4) arising subapically on ventral margin, curving to left lateral side, angled cephalad, bifurcated with dorsal branch (E4a) irregularly sinuate, subapically expanded into serrated lobe (visible from dorsal or ventral view); ventral branch half length of dorsal. serrated in distal half ( Figs 27 View FIGURE 27 , 28 View FIGURE 28 ). Anal tube, in lateral view, narrowly quadrate with distal portion narrowed beyond paraproct, apexs downcurved, nearly reaching apex of gonostyli ( Fig. 26 View FIGURE 26 ).
Plant Associations. Pandanus sp. ( Pandanaceae ).
Distribution. Eastern Madagascar, Atsinanana Region, Parc Mitsinjo.
Etymology. The specific name is derived from the Latin word ‘ cornigera ’ meaning ‘horn-bearing’ (referring to the horn-like callus above the eye). The name is given the feminine termination ( -a) to match the gender of the genus.
Material Examined. Holotype ♂, Madagascar, Atsinanana Region / Parc Mitsinjo / 30.I.2023, ♂ / Coll.:
B.W.Bahder / Host: Pandanus sp. , Fescennia cornigera (FLREC) . Paratypes ( n =2) same as holotype.
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.