Spanglerelmis Polizei & Bispo, 2022

Polizei, Thiago Tadeu Silva, Costa, Lucas de Souza Machado & Bispo, Pitágoras da Conceição, 2022, Spanglerelmis, a new genus of Elmidae (Insecta: Coleoptera) from Brazil with new species and biological notes, European Journal of Taxonomy 813 (1), pp. 33-56 : 52

Key to the species of Spanglerelmis Polizei & Bispo gen. nov.

1. Protibia not swollen ( Fig. 2 ); hypomeron with a belt of tomentum near the suture ( Fig. 7C ); apical tarsomere as long as the four-preceding combined; abdominal ventrite 1 with a pair of carinae, ventrite 5 strongly emarginate laterally ( Fig. 2B )................................................................................ ..................................................................... Spanglerelmis xiririca Polizei & Bispo gen. et sp. nov.

– Protibia swollen ( Figs 1B, F , 9A–B ); hypomeron without a belt of tomentum near the suture ( Figs 1B, F , 9B ); apical tarsomere shorter than the four-preceding combined; abdominal ventrite 1 without carinae, ventrite 5 moderately emarginate laterally ( Fig. 9B ) ........................................................... 2

2. Elytron with first puncture on interval IV bigger and deeper than any others ( Fig. 9A ); setae of the protarsomeres no longer than on the other legs (males); metatibia without spur; phallobase 1.5× as long as penis, approximately 2.5× as long as wide; penis 4× as long as wide (9C– D) ................................................................. Spanglerelmis timburi Polizei & Bispo gen. et sp. nov.

– Elytron with first puncture on interval IV not bigger and deeper than any others ( Fig. 1A, E ); setae of the protarsomeres longer than on the other legs (males); metatibia with a curved spur (males); phallobase 2× as long as penis, approximately 4× as long as wide; penis 3× as long as wide ............................................................ Spanglerelmis femoralis ( Hinton, 1940) gen. et comb. nov.

Biological notes

Spanglerelmis is only recorded from the Atlantic rainforest ( Fig. 10 ). Most of the material was collected by the authors during expeditions to unimpacted streams in the São Paulo State, Brazil, in the years 1999 to 2000 and 2013, where a high diversity of aquatic beetles, mostly of the family Elmidae , was collected. Samples containing the two new species were collected from streams with high oxygen concentrations and rocky bottoms ( Fig. 10B–E ) in Parque Estadual Caverna do Diabo (Eldorado) ( Fig. 10B ); Parque Estadual Intervales (Ribeirão Grande) ( Fig. 10C ); the region of Echaporã ( Fig. 10D ); and the region of Timburi ( Fig. 10E ). These streams are in basins with undisturbed vegetation and in elevations that range from 452 m to 820 m. In general, the specimens were collected in riffles at a depth of 0.1 m to 0.5 m, in streams with different slopes and with alternating pools and riffles ( Fig. 10B–E ).

Figures

Fig. 2. Spanglerelmis xiririca Polizei & Bispo gen. et sp. nov., holotype, ♂ (MZSP31444). Habitus. A. Dorsal view (arrow showing the pattern of tomentum on femur). B. Ventral view. Scale bar = 0.5 mm.

Fig. 7. Spanglerelmis xiririca Polizei & Bispo gen. et sp. nov. under scanning electron microscope, ♀ (MZSP31481). Ventral view. A. Habitus. B. Hind leg (arrow showing the pattern of tomentum on femur). C. Prosternum and mesoventrite. D. Metaventrite and abdominal ventrites I–II. Scale bars = 0.1 mm.

Fig. 1. A–D. Spanglerelmis femoralis (Hinton, 1940) gen. et comb. nov., holotype, ♂ (NHMUK 010583892). A–C. Habitus. A. Dorsal view. B. Ventral view. C. Lateral view. D. Aedeagus in ventral view. E–H. Microcylloepus ochus Hinton, 1940, holotype, ♂(NHMUK 010583871). E–G. Habitus. E. Dorsal view (arrows showing the pattern of tomentum on femur). F. Ventral view. G. Lateral view. H. Aedeagus in ventral view. Scale bars: A–C, E–G = 0.5 mm; D, H = 0.1 mm.

Fig. 9. Spanglerelmis timburi Polizei & Bispo gen. et sp. nov. holotype, ♂ (MZSP31520). A–B. Habitus. A. Dorsal view (arrows showing the pattern of tomentum on femur). B. Ventral view. C–D. Aedeagus in ventral view. E. Aedeagus in lateral view. Scale bars: A–B = 0.5 mm; C–E = 0.1 mm.

Fig. 10. Distribution records for Spanglerelmis Polizei & Bispo gen. nov. A. Map of Brazil highlighting the São Paulo and Santa Catarina States, showing the localities of Spanglerelmis gen. nov. B–D. Locality of Spanglerelmis xiririca gen. et sp. nov. B. Parque Estadual Caverna do Diabo, Eldorado, São Paulo State, Brazil (type locality) (24°38′00.7ʺ S, 048°24′32.7ʺ W). C. Parque Estadual de Intervales, Ribeirão Grande, São Paulo State, Brazil (24°16′16ʺ S, 048°25′31ʺ W). D. Echaporã, São Paulo State, Brazil (22°25′06.9ʺ S, 050°12′0.9ʺ W). E. Type locality of Spanglerelmis timburi gen. et sp. nov. Timburi, São Paulo State, Brazil (23°11′01.6ʺ S, 049°37′49.2ʺ W). F. Type locality of Spanglerelmis femoralis gen. et comb. nov. Nova Teutônia (currently county of Seara), Santa Catarina State, Brazil (27°09′42.5′′ S, 052°25′28.5′′ W).