A new genus of railroad-worm beetles from the Atlantic Rainforest from Brazil (Coleoptera: Phengodidae, Mastinocerinae) Author Roza, André Silva Author Mermudes, José Ricardo Miras text Papéis Avulsos de Zoologia 2020 Pap. Avulsos Zool., S. Paulo 2020-03-04 60 10 1 12 http://dx.doi.org/10.11606/1807-0205/2020.60.special-issue.10 journal article 10.11606/1807-0205/2020.60.special-issue.10 1807-0205 4615131 04F6D8C6-82AE-4987-A217-02DE972CE3DB Cleidella picea sp. nov. ( Figs. 1-5 ) Type material: HOLOTYPE ( ♂ , DZRJ ): BRAZIL . Rio de Janeiro : Teresópolis. Parque Nacional da Serra dos Órgãos. PVE Pt. 12A, 22°27′18,2″S , 43°00′58,9″W , 1,812 m , IX.2015 , R . Monteiro col. PARATYPES : Rio de Janeiro : Teresópolis. Parque Nacional da Serra dos Órgãos. PVE Pt. 9A, 22°26′55,1″S , 43°00′16,4″W , 1,246 m , II.2015 ( 1 ♂ , DZRJ ) ; PVE Pt. 9B, 22°26′57.8″S , 43°0′13.7″W , 1,236 m , II.2015 , R . Monteiro col. ( 2 ♂ , DZRJ ) . Diagnosis: Eyes occupying nearly half of head width, in lateral view, posterior margin vertical, slightly reniform ( Fig. 1C ). Pronotum 1.1× wider than long, anterior margin curved, posterior margin slightly curved ( Fig. 1E ). Body overall dark brown, with head and pronotum from black to dark brown, and mandibles, palpi and internal margin of pro- and mesocoxae and femora brown to light brown ( Figs. 1 A-B). Description, male Measurements (n = 4): Total length: 4.2-4.7 mm (aver. 4.4 mm ). Head length: 0.57-0.65 mm (aver. 0.6 mm ). Head width: 0.74-0.76 mm (aver. 0.75 mm ). Pronotum length: 0.62-0.65 mm (aver. 0.64 mm ). Pronotum maximum width: 0.71-0.76 (aver. 0.73 mm ). Elytron length: 1.80-1.85 mm (aver. 1.82 mm ). Elytron maximum width: 0.52-0.57 mm (aver. 0.54 mm ). Morphology: Head wider than long, integument glossy, finely punctate, interocular distance occupying slightly more than half of head width in dorsal view ( Fig. 1E ); eyes occupying nearly half of head width, in lateral view, posterior margin vertical, slightly reniform ( Fig. 1C ); antennomere IV 2× longer than III, progressively longer from IV to X, XI cylindrical, 1.5× longer than X; IV-X each with two long, symmetrical branches, 2 to 8× longer than antennomere ( Fig. 1D ). Pronotum 1.1× wider than long, integument glossy, finely punctate, anterior margin curved, lateral margins convergent in anterior half, dorsally parallel in posterior half, posterior margin slightly curved ( Fig. 1F ). Elytron heavily setigerous punctate, 3.1-3.5× longer than wide ( Fig. 4A ), reaching anterior margin of forth abdominal segment ( Fig. 1B ). Tergite IX transversal, twice wider than long in the middle line; tergite X slightly longer than wide ( Fig. 5A ); sternite IX twice longer than wide when including membranous area, inner curved in the posterior margin ( Fig. 5B ). Aedeagus: basal piece entirely sclerotized, ribbon-like; median lobe cylindrical, strongly curved at base, rounded and constricted apically, with many tiny glandular openings; flagellum encircled around median lobe at rest; about 1.5× longer than median lobe length; parameres parallel, symmetrical, narrowing slightly past the middle towards the apex, which is unciform, toothed inward, with short and scarce bristles separated by a distance at least twice the seta length ( Figs. 5 C-H). Figure 7. Distribution of Cleidella gen.nov. species. Coloration: Body overall dark brown, with head and pronotum from black to dark brown, and mandibles, palpi and internal margin of pro and mesocoxae and femora brown to light brown. Females and immatures: Unknown. Etymology: The specific name is a Latin adjective for “pitch-black” and refers to the dark overall color of the specimens’ integument. Biology and distribution: Cleidella picea sp. nov. occurs on the Spring and Summer of the southern hemisphere. It inhabits altitudinal areas of the Serra dos Órgãos,in the Serra do Mar mountain range, around 1,250 -1,800 m , in a vegetation type of montane and high-montane forest. Remarks: This species can be easily distinguished from Cleidella silveirai sp. nov. by the eyes, in lateral view, with posterior margin vertical, slightly reniform (strongly obliquely projected in P. silveirai sp. nov. ); pronotum slightly wider than long (distinctly wider than long in P.silveirai sp. nov. ); and the body overall dark brown, with head and pronotum from black to dark brown, and mandibles, palpi and internal margin of pro and mesocoxae and femora brown to light brown (body overall light brown, head brown, palpi, thoracic sterna, legs, tergites and sternites pale yellow in P. silveirai sp. nov. ).