Eunemadina
Creators: name: Peck, Stewart B.
name: Gnaspini, Pedro
name: Newton, Alfred F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Leiodidae

description: Key to Genera of Eunemadina of Latin America (modified from Salgado, 2005b)
1a Longest metatibial spur serrate, and slightly shorter, as long as or longer than first tarsomere; Neotropical except southern South America.................................................................................. Dissochaetus
1b Longest metatibial spur not or indistinctly serrate, and much shorter than first tarsomere; southern South America, no further north than northern Chile ............................................................................... 2
2a Pronotum with abruptly excavate hind angles; neck on each side with a large deep invagination; elytra not distinctly transversely striolate............................................................................. Falkocholeva
2b Pronotum not or evenly narrowed toward base, hind angles not excavate, usually right or obtuse; neck without invaginations; elytra transversely striolate.............................................................................. 3
3a Median lobe of aedeagus asymmetrical; marginal setae on median lobe with non-symmetrical insertions pores; male mesotarsi with first two segments expanded.............................................................. Araucaniopsis
3b Median lobe of aedeagus symmetrical; if present, marginal setae with symmetrical insertion pores; male mesotarsi either simple or bearing one or two expanded segments.................................................................. 4
4a Male mesotarsi with first two segments expanded............................................................ 5
4b Male mesotarsi simple or with first segment expanded........................................................ 6
5a Body size small, less than 2.50 mm long; punctation on head very fine and superficial; mesosternum with complete longitudinal carina; parameres of aedeagus forceps-shaped, with setae on internal margin; basal lamina of aedeagus longer than median lobe......................................................................................... Peckardia
5b Larger body size, over 3.00 mm long; punctation on head very strong and deep; mesosternum not all carinate; parameres of aedeagus subcylindrical, lacking setae on internal margin; basal lamina of aedeagus as long as median lobe.... Newtoniopsis
6a Male metasternum strongly bituberculate; male segment tubuliform, longer than wide, with the sternal apophysis nonexistent or rudimentary....................................................................................... 7
6b Male metasternum not tuberculate; male segment not tubuliform, wider than long, often about as long as wide, with the sternal apophysis developed and wide if short..................................................................... 8
7a Pronotum weakly transverse, at most 1.25 times wider than long; antennal segments longer than wide, only segment 8 slightly transverse; lateral margins of median lobe festooned, apical region lanceolate; parameres of aedeagus strongly widened and flattened; body extremely long and narrow, not more than 0.4 x as wide as long.......................... Nemadotropis
7b Pronotum strongly transverse, at least 1.50 times wider than long; antennal segments 6 to 10 transverse, lateral margins of median lobe rectilinear, apically wide; parameres of aedeagus subcylindrical; body less elongate, more than 0.4 x as wide as long....................................................................................... Eunemadus
8a Apical segment of maxillary palp very small, much shorter than and only half as wide at base as penultimate segment; occipital crest scarcely elevated above neck at midline; mesosternum not carinate; parameres of aedeagus glabrous or with small apical setae.................................................................................... Falkonemadus
8b Apical segment of maxillary palp usually not much shorter than, and at least 2/3 as wide at base as, penultimate segment; occipital crest strongly elevated throughout; mesosternum usually with mid-longitudinal carina on at least posterior third; parameres of aedeagus each with at least 2 apical setae............................................................ 9
9a All antennal segments clearly longer than wide; antennal segments 1, 2, and 3 over three times longer than wide; ventrite of female 8 th abdominal segment triangular, spiculum ventrale very short; very fine punctures on head, almost indiscernible; mesotarsi simple............................................................................ Pseudonargiotes
9b Antennal segment 8 always clearly transverse; 1, 2, and 3 shorter than three times width; ventrite of female 8 th abdominal segment more or less widely arcuate, spiculum ventrale well-developed; fine or stout punctures on head; mesotarsi simple or with widened first tarsomere............................................................................... 10
10a Male mesotarsus with first segment without tenent setae, slender; fine or non-existent punctures on head (except for subgenus Reticulonemadioluls).......................................................................... Nemadiolus
10b Male mesotarsus with first segment bearing tenant setae and more or less expanded; punctures on head strong... Nemadiopsis
description: Published as part of Peck, Stewart B., Gnaspini, Pedro & Newton, Alfred F., 2020, Updated catalog and generic keys of the Leiodidae (Insecta: Coleoptera) of the Neotropical region (" Latin America ": Mexico, the West Indies, and Central and South America), pp. 1-114 in Zootaxa 4741 (1) on pages 19-20, DOI: 10.11646/zootaxa.4741.1.1, http://zenodo.org/record/3772899