Egerocoris, Minghetti & Montemayor & Dellapé, 2024
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publication ID |
https://dx.doi.org/10.3897/dez.71.104130 |
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publication LSID |
lsid:zoobank.org:pub:A0C8103C-B56C-40E9-9C38-1D2617F8A3C4 |
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persistent identifier |
https://treatment.plazi.org/id/10DAE851-82DB-4BD4-9E51-2DEEFD77F055 |
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taxon LSID |
lsid:zoobank.org:act:10DAE851-82DB-4BD4-9E51-2DEEFD77F055 |
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treatment provided by |
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scientific name |
Egerocoris |
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gen. nov. |
Egerocoris gen. nov.
Type species.
Egerocoris ecuatorianus sp. nov.
Included species.
Egerocoris chaparensis sp. nov., E. dimorphus sp. nov., E. ecuatorianus sp. nov.
Diagnosis.
Eyes large, stylate (Fig. 1B-D View Figure 1 ), partly covering collar in lateral view (Fig. 3B-D View Figure 3 ); labrum short, less than half labial segment I length; antennal segment I slightly narrowing on distal half and wider than antennal segment II; collar wider than antennal segment I; embolium flat, bent upwards from its anterior end to less than a half its length; dorsal wall of genital capsule sclerotized, left wall shorter than right wall (Fig. 6 View Figure 6 ); left paramere body triangular, with apical process initially curved and V-shaped in frontal view (Fig. 8 View Figure 8 ); and, ductus seminis basally expanded (Fig. 10A, B View Figure 10 ).
Description.
Macropterous male. Body length to apex of membrane 4.42-4.66; body length to apex of cuneus 3.95-4.66; body width 1.94-2.43.
Surface shiny; posterior pronotal lobe evenly punctate. Head, collar, pronotum and hemelytra with abundant short, recumbent setae.
Structure. Head width more than twice length. Clypeus rounded in lateral view, not visible from above. Frons rounded in lateral view (Fig. 3B-D View Figure 3 ). Vertex flat (Fig. 2B-D View Figure 2 ), wider than head length. Eyes large, more than half head height, stylate, interior margin straight and at lateral collar margins level (Fig. 1B-D View Figure 1 ). Gular area not visible. Labium extending at least to metacoxae; segment I concave ventrally. Antennal segment I slightly narrowing on distal half. Antennal segment II straight, slender. Antennal segment III narrowing towards the apex, more slender than segment II. Antennal segment IV straight. Thorax: collar wider than antennal segment I; anterior margin concave and posterior margin straight. Pronotum slightly directed downwards. Calli evident, small to large, separated by a median depression, sometimes attaining to pronotal lateral margins. Posterior pronotal lobe with shallow lateral depressions before humeral angles; posterior margin straight (Fig. 1B-D View Figure 1 ). Mesoscutum exposed (Fig. 1B View Figure 1 ). Scutellum with anterior depression. Hemelytron flat in lateral view; lateral margin convex (Fig. 1B-D View Figure 1 ). Embolium flat, straight to slightly expanded on posterior margin, bent upwards. Medial fracture visible, shorter than half the corium length. Cuneus longer than wide (in one species the length sexually dimorphic as in Fig. 4 View Figure 4 ). Veins angled in middle of membrane before posterior margin of cuneus; cell with interior and posterior margins straight (Fig. 4 View Figure 4 ). Legs: profemora broader at base. Metafemora slightly curved. Protibiae wider than meso- and metatibiae. Male genitalia: genital capsule length variable relative to abdomen length, longer than wide. Right wall more developed than left wall. Dorsal wall in lateral view straight, well developed laterally, with sclerotized processes (Fig. 5B, D, F View Figure 5 ); posterior margin concave. Ventral wall in lateral view oblique, more developed than the dorsal wall (Fig. 6 View Figure 6 ); posterior margin sinuate. Subgenital plate with two processes, one on the left side and one on the right side (Fig. 7 View Figure 7 ); each one embedded with corresponding paramere. Genital opening broad, dorsally directed. Left paramere (Fig. 8 View Figure 8 ) smaller or larger than right paramere; body broad, triangular; apical process well developed, basally curved; expanded or not at apex. Right paramere (Fig. 9 View Figure 9 ) simpler than left paramere; uniformly wide; slightly to strongly curved. Aedeagus (Fig. 10 View Figure 10 ) small and simple; phallotheca membranous on basal half, sclerotized on distal half. Ductus seminis basally expanded, membranous and not folded; sclerotized behind last curvature; apex extending to middle of phallotheca; endosoma membranous to sclerotized.
Macropterous female. Body length to apex of membrane 4.28-4.94; body length to apex of cuneus 3.7-4.51; body width 1.97-2.09. Lateral margins of hemelytra either convex or (in species with sexual dimorphism) parallel with less well developed cuneus.
Geographic distribution.
Bolivia, Ecuador (Fig. 11 View Figure 11 ).
Etymology.
The name of the genus is formed from the family name of Joe Eger, who has extensively collected Heteroptera , including one of the specimens studied herein, and published several papers on the group, combined with the latinized Greek noun coris, meaning "true bug". Gender masculine.
Discussion.
Egerocoris resembles Neella in general appearance, but in Neella the eyes are stylated but not covering the lateral margins of collar, the postocular region of head present a patch of setae, the antennal segment I is straight and as wide as II, the subgenital plate lacks processes and the parameres are simpler.
Egerocoris runs to the couplet 8 in the key to the Neotropical eccritotarsine genera ( Carvalho and Ferreira 1995) where the genera Hesperolabops Kirkaldy, 1902 and Aztecarina Calvalho, 1974 are identified. These genera are quite different from Egerocoris , since Hesperolabops shows strongly pedunculated eyes, a lobate collar, and a curved spiniform projection in the genital capsule, and Aztecarina shows a strongly punctate pronotum with its posterior margin sinuated and antennal segments I and II of similar length. The character states of the large, stylate eyes that partly cover the collar in lateral view, the short labrum, the long labium extending at least to metacoxae, the slightly narrowing antennal segment I on the distal half and wider than antennal segment II, the collar being wider than antennal segment I, the posterior pronotal lobe evenly punctate with its posterior margin straight, and the embolium being flat, bent upwards from its anterior end to less than a half its length, combined with characters of the male genitalia, including the presence of sclerotizations in the dorsal wall of the genital capsule, the processes on the subgenital plate embedding the parameres, and the triangular left paramere with a well-developed apical process, allow the recognition of this genus from the four genera omitted in Carvalho and Ferreira’s key and the five genera described afterwards detailed in the Thomasomiris discussion above.
Egerocoris dimorphus sp. nov. shows sexual dimorphism in the shape and length of cuneus similar to Proneella Carvalho, 1960, but the hemelytra are slightly more convex, and the cuneus is wider relative to its length. This species runs to the couplet 13 in the Carvalho and Ferreira’s key (1995) where Proneella and Neoneella Costa Lima, 1942 are identified. According to Carvalho (1960), the sexual dimorphism relates Proneella with Neoneella , and in both genera the included species also share several characters from internal and external morphology. Among the three species of Egerocoris two of them lack sexual dimorphism, but share several characters from the male genitalia and from the external morphology allowing us to infer a close relationship and justifying the inclusion of these species in the same genus, besides the absence of sexual dimorphism in E. ecuatorianus sp. nov. and E. chaparensis sp. nov.
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