Chimerocoris BARROs & Barão & Grazia 2020, gen.n
| Main Authors: | BARROs, Lurdiana D., Barão, Kim R., Grazia, Jocélia |
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| Format: | info publication-taxonomictreatment Journal |
| Terbitan: |
, 2020
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/4362536 |
Daftar Isi:
- Chimerocoris gen.n. Type species. Chimerocoris luridus sp.n., here desig-nated. Diagnosis. Head longer than wider; labium long; sur-passing the middle of abdominal sternite 6; labiomere 2 flattened laterally. Anterolateral margins of pronotum not reflexed. Basal angles of scutellum with foveae subequal to the diameter of a compound eye. Layers of ventral rim of pygophore separated by a carina; parameres reduced, with obsolete crown; segment Xwith a transverse carina and 1 + 1 thorn-like processes at base. Description. Body ovate. Head: Head longer than wide, apex rounded (Figs. 6A; 19D). Mandibular plates shorter than clypeus, obtuse at apices; lateral margins of mandib-ular plates sinuous. Clypeal apex obtuse, in a higher level than mandibular plates in lateral view; clypeal suture be-ginning after an imaginary line crossing anterior margin of compound eyes; antenniferous tubercles visible in dorsal view, each with an obtuse process laterally. Anten-nomere 1 not reaching apex of head; antennomere 2 vis-ible; antennomere 3 cylindrical; antennomere 4 conical, convex dorsally (Fig. 18 Fii). Bucculae sinuous, truncate posteriorly. Labium long, surpassing middle of sternite 6; first labiomere lying entirely between the bucculae; la-biomere 2 flattened laterally and labiomeres 3 and 4 uni-formly entire. Thorax: Pronotum trapezoidal (Fig. 19D); anterolateral margins explanate, not reflexed, impunc-tate; posterior margin slightly convex. Mesosternal ca-rina elevated, smooth; metasternal furrow shallow. Each of ostiole of ESES guttiform, opening posterolaterally; each peritreme spout-shaped; medial furrow of the each ostiolar peritreme long, occupying more than of length of peritreme; evaporatorium punctate, each occupying more than half of meso- and metapleuron; evaporatorium on mesopleuron reaching its anterior and posterior lateral angles, and surpassing the limits of mesocoxal sutures (Fig. 18I). Metathoracic spiracle wide. Length of femora and tibiae subequal; femora unarmed; tarsi 3-segmented. Scutellum longer than wide (Fig. 6A). Basal angles of the scutellum foveate; foveae subequal to diameter of a compound eye. Corium longer than scutellum, surpass-ing apices abdominal tergite 5 and apex of each radial vein conspicuously calloused. Abdomen: Connexivum exposed (Fig. 6A). Sublateral margins of abdominal sternites not concolourous with abdominal venter (Figs. 6C, 19H). Medial longitudinal groove reaching sternite 6 (Fig. 6B). Male terminalia: Genital cup of pygophore broad, open posterodorsally; ventral rim composed of two layers, the inferior and superior layers, separated by a carina (Figs. 6E, 19J – L). Superior layer of ventral rim, projecting toward genital cup, developed laterally to seg-ment X, not covering parameres; lateral margin of each projection of superior layer notched. Segment Xcarinate and with 1 + 1 thorn-like processes at base. Parameres reduced, with obsolete crown. Etymology. From Greek Chimero - mythological figure characterized by a hybrid appearance referring to the combination of characters of two genera (Tibraca and Paramecocephala); and - coris, stink bug; masculine. Comments. Chimerocoris has the habitus and length of labium similar to Paramecocephala, and the morphol-ogy of pygophore similar to Tibraca. The comparison of these genera is presented in Figure 19. Distribution. Brazil: Rio Grande do Sul (Fig. 17).
- Published as part of BARROs, Lurdiana D., Barão, Kim R. & Grazia, Jocélia, 2020, Systematics of the Mecocephala group (Hemiptera: Heteroptera: Pentatomidae) based on a phylogenetic perspective: Inclusion of Hypanthracos, description of three new genera, and redescription of Ogmocoris, pp. 321-360 in Arthropod Systematics & Phylogeny 78 (2) on pages 334-335, DOI: 10.26049/ASP78-2-2020-07, http://zenodo.org/record/4360215