Amydetes alexi Campello, Vaz, Mermudes & Silveira, 2022
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publication ID |
https://dx.doi.org/10.3897/zookeys.1114.77692 |
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publication LSID |
lsid:zoobank.org:pub:D865EE03-6617-4BA1-8064-BBEE3AC72758 |
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persistent identifier |
https://treatment.plazi.org/id/D396352E-BD3B-490B-A1EE-AC2A6389B303 |
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taxon LSID |
lsid:zoobank.org:act:D396352E-BD3B-490B-A1EE-AC2A6389B303 |
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treatment provided by |
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scientific name |
Amydetes alexi Campello, Vaz, Mermudes & Silveira, 2022 |
| status |
sp. nov. |
Amydetes alexi Campello, Vaz, Mermudes & Silveira, 2022 sp. nov.
Figs 13 View Figure 13 , 14 View Figure 14 , 15 View Figure 15 , 16 View Figure 16
Etymology.
The specific epithet Amydetes alexi , is a masculine noun in the genitive case. This species is named in honor of Alex Schomaker Bastos, our dearest friend and biology student at the Universidade Federal do Rio de Janeiro, who was murdered on 8 January 2015.
Diagnosis.
Antennae with scape and pedicel yellowish brown (Fig. 14G View Figure 14 ), flagellum dark brown (Fig. 14G View Figure 14 ); pronotal disc dark brown with margins yellowish brown (Fig. 15A, B View Figure 15 ); elytra dark brown with outer margin yellow (Fig. 13A-C View Figure 13 ); posterolateral margin of thorax yellowish brown (including the posterior corners of metaepisternum and metaepimeron, in addition to the anterior portion of metacoxa; Fig. 13A View Figure 13 ); legs yellowish brown darkened to dark brown toward apex (Fig. 13A View Figure 13 ); sides of sternites II-V translucent (Fig. 13A View Figure 13 ); sternite VIII translucent (Fig. 16E View Figure 16 ); antennae with 33-37 antennomeres (Fig. 13G View Figure 13 ); antennomere III 0.5 × longer than scape (Fig. 14G View Figure 14 ); maxillary and labial apical palpomere subequal in length (Fig. 14A-E View Figure 14 ); hypomeron as long as tall (Fig. 15C View Figure 15 ); lantern occupying the posterior 1/2 of the sternites VI and VII, and 3/4 the width of these sternites (Fig. 13A View Figure 13 ).
Description.
Male. Coloration. Antennae with scape and pedicel yellowish-brown (Fig. 14G View Figure 14 ), flagellum dark brown (Fig. 14G View Figure 14 ); pronotal disc dark brown with margins yellowish brown (Fig. 15A, B View Figure 15 ); elytra dark brown with outer margin yellow (Fig. 13A-C View Figure 13 ); posterolateral margin of thorax yellowish brown (Fig. 13A View Figure 13 ); legs yellowish brown darkened to dark brown toward apex (Fig. 13A View Figure 13 ); sides of sternites II-V translucent (Fig. 13A View Figure 13 ); sternite VIII translucent (Fig. 16E View Figure 16 ). Head. Antennae flabellate with 33-37 antennomeres (Fig. 14G View Figure 14 ); antennomere III 1/2 × longer than scape, with flabellum 3 × longer than antennomere III. Fronto-clypeus as wide as 1/2 distance between antennifers process (Fig. 14C View Figure 14 ). Maxillary and labial apical palpomere subequal in length (Fig. 14A-E View Figure 14 ); maxillary palpomere I, II and IV 2 × longer than wide, III 2 × wider than long, I 2/3 × longer than II, II approximately 2 × longer than III, IV approximately 3 × longer than III (Fig. 14A-D View Figure 14 ). Gular margins separated by 1/2 length of maxillary palpomere IV (Fig. 16B View Figure 16 ). Thorax. Pronotum 1.5 × wider than head width in ventral view (Fig. 13A View Figure 13 ), 1.5 × wider than long (Fig. 15A View Figure 15 ). Hypomeron as long as tall (Fig. 15C View Figure 15 ). Abdomen. Lanterns occupying the posterior 1/2 of sterna VI and VII, as wide as 2/3 the width of these sternites (Fig. 13A View Figure 13 ). Sternite VIII with posterior margin bisinuate, central 1/3 longer than posterolateral angles (Fig. 16E View Figure 16 ). Pygidium 1.5 × wider than long (Fig. 16F View Figure 16 ), with posterior margin bisinuate, postero-lateral projections as long as 1/5 length of the central projection. Phallus 1.5 × longer than parameres (Fig. 16A-C View Figure 16 ); parameres basally constricted, 2 × longer than phallobase (Fig. 16A-C View Figure 16 ); phallobase asymmetrical (Fig. 16A, C View Figure 16 ).
Females and immature stages. Unknown.
Biology.
Forty-five individuals were collected in hilly areas in the Pedra Branca State Park (Fig. 1 View Figure 1 ), between 140 and 800 m a.s.l. Twelve were collected using Malaise traps: four at 250 m a.s.l. and nine at 280 m a.s.l. All individuals were collected between May and August 2017, which are relatively cooler months. Despite limited sampling, we noticed that the greatest abundance was found around 250-500 m a.s.l., with 23 individuals collected. One specimen, collected on 4 October 2017, was actively flying during daylight (~13:00), suggesting that this species is diurnal, which is congruent with the species’ morphology (i.e., smaller eyes and lanterns; Silveira and Mermudes 2014a).
Remarks.
Amydetes alexi sp. nov. differs from A. bellorum and A. marolae sp. nov. in the length of maxillary palpomere IV, which is at least 6 × longer than III in A. marolae sp. nov. and A. bellorum , but only 3 × longer than III in three species: A. itatiaia , A. apicalis , and A. alexi sp. nov. Amydetes alexi sp. nov. differs from A. itatiaia in the length of flabellum of antennomere III (3 × longer than pedicel in A. alexi sp. nov., but equal in A. itatiaia ). The new species shares the following traits with A. apicalis : pronotum with posterolateral angles pointed but weakly developed; flabellum of antennomere III 3 × longer than pedicel; and phallobase asymmetrical. Nevertheless, A. alexi sp. nov. differs from A. apicalis in having antennae with 33-37 antennomeres (37-44 in A. apicalis ) and lantern of sternite VI up to 1/2 sternite length (3/5 in A. apicalis ). The distribution of A. alexi sp. nov. is apparently restricted to Pedra Branca massif, as it has not been found nearby by our team (e.g., Silveira et al. 2020).
Type material.
Holotype: Brazil • Rio de Janeiro: Rio de Janeiro: Taquara, Núcleo Pau da Fome, Rio da Fazenda; 285 m a.s.l.; ♂; 6 Aug.-3 Sep. 2017; A. Diniz leg. (DZRJ).
Paratypes: Brazil • Rio de Janeiro: Rio de Janeiro: Taquara, Núcleo Pau da Fome, Trilha para o açude; 1 ♂; 7-10 May. 2017; L. Silveira, A. Diniz leg. (MNRJ) • same data as for preceding, Afluente do Rio Grande, perto da Cachoeira Sete Quedas; 255 m a.s.l.; 4 ♂, 22-19 Jun. 2017; A. Diniz leg. (MNRJ) • same data as for preceding; 3 ♂; 19 Jun.-19 Jul. 2017; A. Diniz leg. (DZRJ) • same data as for preceding, Próximo às ruínas; 5 ♂; 23 Jun.-4 Aug. 2017, A. Diniz leg. (MNRJ) • same data as for preceding, Travessia para o Rio da Prata; 800 m a.s.l.; 3 ♂; 20 Jul. 2017; A. Diniz leg. (MNRJ) • same data as for preceding; 450 m a.s.l.; 8 ♂ 8 Aug.-4 Sep. 2017; L. Silveira, A. Diniz leg. (DZRJ) • same data as for preceding; 300-400 m a.s.l.; 4 ♂; 4 Sep. 2017, L. Silveira leg. (DZRJ) • 22°55'59,7"S, 43°26'29,0"W; 140 m a.s.l., 12 ♂; J. Nessimian, L. Dumas, T. Almeida, B. Genário, L. Diniz leg. (DZRJ) • same data as for holotype; 4 ♂ (MNRJ).
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