Cleidella silveirai, Roza & Mermudes, 2020

Roza, André Silva & Mermudes, José Ricardo Miras, 2020, A new genus of railroad-worm beetles from the Atlantic Rainforest from Brazil (Coleoptera: Phengodidae, Mastinocerinae), Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 60 (10), pp. 1-12: 10-11

publication ID

http://doi.org/ 10.11606/1807-0205/2020.60.special-issue.10

publication LSID

lsid:zoobank.org:pub:04F6D8C6-82AE-4987-A217-02DE972CE3DB

persistent identifier

http://treatment.plazi.org/id/03E37046-0B14-FF9A-FEFB-F8FA220FFBEC

treatment provided by

Carolina

scientific name

Cleidella silveirai
status

sp. nov.

Cleidella silveirai   sp. nov.

( Fig. 6 View Figure 6 )

Type material: HOLOTYPE (♂, DZRJ): BRAZIL. Rio de Janeiro: Teresópolis. Parque Nacional da Serra dos Órgãos. PVE Pt. 5B, 22°28′37.6″S, 42°59′45.5″W, 691 m, IX.2015, R. Monteiro col. GoogleMaps   PARATYPES: Rio de Janeiro: Teresópolis. Parque Nacional da Serra dos Órgãos. Same data as holotype, XII.2014 (1 ♂, DZRJ, 1 ♂, MZSP) GoogleMaps   ; PVE Pt. 8A, 22°27′11,3″S, 42°59′33,9″W, 1,071 m, XI.2015, R. Monteiro col.(1 ♂, DZRJ) GoogleMaps   ; Angra dos Reis.Parque Estadual da Ilha Grande. IG 2 A, 23°09′12.4″S, 44°11′24.1″W, 720 m, XI.2017, (1 ♂, DZRJ), I.2018 (1 ♂, DZRJ), Silveira, Campello, Vaz & Queiroz col. GoogleMaps  

Diagnosis: Eyes, in lateral view, strongly obliquely projected ( Fig. 6E View Figure 6 ). Pronotum 1.4× wider than long, anterior and posterior margins slightly curved to nearly straight ( Fig. 6F View Figure 6 ). Body overall light brown, head brown, palpi, thoracic sterna, legs, tergites and sternites pale yellow ( Figs. 6 View Figure 6 A-B).

Description, male

Measurements (n = 6): Total length: 3.2-3.6 mm (aver. 3.4 mm). Head length: 0.47-0.53 mm (aver. 0.5 mm). Head width: 0.62-0.67 mm (aver. 0.64 mm). Pronotum length: 0.42-0.44 mm (aver. 0.43 mm). Pronotum maximum width: 0.59-0.63 (aver. 0.6 mm). Elytron length: 1.55-1.6 mm (aver. 1.57 mm). Elytron maximum width: 0.39-0.48 mm (aver. 0.44 mm).

Morphology: Head wider than long, integument glossy, finely punctate, frons slightly concave between antennal insertions, interocular distance occupying half of head in dorsal view ( Fig. 6F View Figure 6 ); eyes occupying ¾ of head width, in lateral view, posterior margin strongly obliquely project- ed ( Fig. 6E View Figure 6 ); antennomere IV 1.5-2× longer than III, progressively longer from IV to VIII, IX and X progressively shorter, XI cylindrical, 1.5-2× longer than X; IV-X with two symmetrical branches, 2 to 4× longer than antennomere ( Fig. 6 View Figure 6 C-D). Pronotum 1.4× wider than long, integument glossy, finely punctate, anterior margin slightly curved, lateral margins weakly convergent, posterior margin slightly curved ( Fig. 6F View Figure 6 ). Elytron heavily setigerous punctate, around 3.5× longer than wide ( Fig. 6A View Figure 6 ), reaching posterior margin of fourth abdominal segment ( Figs. 6 View Figure 6 A-B). Tergites IX and X, sternite IX and aedeagus shows no morphological variation in relation to C. picea   sp. nov.

Coloration: Body overall light brown, head brown, palpi, sternum, legs, tergites and sternites pale yellow.

Females and immatures: Unknown.

Etymology: Patronymic. The name silveirai is given in honor of Luiz Felipe Lima da Silveira, a fellow coleopterist graduated from Universidade Federal do Rio de Janeiro, currently an assistant professor at the Western Carolina University, USA. Luiz is a Lampyridae   specialist which also has interest in other soft-body Elateroid beetles, encouraging the first author to start the studies with Phengodidae   . He has also collected extensively in areas of Rio de Janeiro state with Malaise traps.

Biology and distribution: Cleidella silveirai   sp. nov. occurs on the Spring and Summer of the southern hemi-

sphere. It inhabits altitudinal areas of the Serra dos Órgãos, in the Serra do Mar mountain range, around 700-1,100 m, in a vegetation type of montane forest, and altitudinal areas of Ilha Grande, around 700 m, in a vegetation type of dense ombrophilous forest.

Remarks: This species can be easily distinguished from Cleidella picea   sp. nov. by eyes, in lateral view, strongly obliquely projected (with posterior margin vertical, slightly reniform in C. picea   sp. nov.); pronotum distinctly wider than long (slightly wider than long in C. picea   sp. nov.); and the body overall light brown, head brown, palpi, thoracic sterna, legs, tergites and sternites pale yellow (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 in C. picea   sp. nov.).

Two distinct populations of Cleidella silveirai   sp. nov. were found, around 100 km apart from each other. The specimens from Ilha Grande have smaller flabellae in the antennae (2 to 3× the antennomere length) and the antennomere XI 1.5× the antennomere X length, while the specimens from the Serra dos Órgãos have longer flabellae in the antennae (3 to 4× the antennomere length) and the antennomere XI 2× the antennomere X length. However, as this was the only difference found between the populations, they were considered as a single species.

R

Departamento de Geologia, Universidad de Chile

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo