Renda Blackwelder, 1952

Márquez, Juan, 2010, Revision of the genus Renda Blackwelder, 1952 (Coleoptera: Staphylinidae: Xantholinini) 2686, Zootaxa 2686 (1), pp. 1-61 : 7-10

publication ID	https://doi.org/ 10.11646/zootaxa.2686.1.1
DOI	https://doi.org/10.5281/zenodo.10538809
persistent identifier	https://treatment.plazi.org/id/237A597D-FFAB-FFDC-7482-C0EBFEBCAB83
treatment provided by	Felipe
scientific name	Renda Blackwelder, 1952
status

Treatment

Renda Blackwelder, 1952 View in CoL

( Figs. 3–10 View FIGURES 1–6 View FIGURES 7–10 )

Renda Blackwelder, 1952: 338 View in CoL (replacement name for Plochionocerus Sharp View in CoL ).

Type species: Sterculia formicaria Laporte , fixed by objective synonymy with Plochionocerus Sharp , by Blackwelder, 1952: 315.

Synonymy: Plochionocerus Sharp, 1885: 471 (preoccupied, not Plochionocerus Dejean, 1833 )

Redescription: Total length 11.3–22.5 mm; body black to dark brown, five species with metallic green or blue coloration.

Head. Oval ( Figs. 11–13 View FIGURES 11–19 ), elongate ( Figs. 17–18 View FIGURES 11–19 ), or quadrate ( Fig. 19 View FIGURES 11–19 ), some times narrowed in posterior region ( Figs. 14–16 View FIGURES 11–19 ); less than 1.5x as long as wide. Dorsal surface with dense setae and umbilicate punctures, with smooth areas on vertex and front, surface variably convex. Ventral surface with umbilicate punctures variably dense, unevenly distributed ( Figs. 22–24 View FIGURES 20–24 ); gular sutures variably convex. Temple convex ( Fig. 27 View FIGURES 25–34 ), or with superior temporal carina (at superior level of eye; Figs. 30, 31 View FIGURES 25–34 ), inferior temporal carina (at inferior level of eye; Fig. 32 View FIGURES 25–34 ), or both temporal carinae ( Figs. 33, 34 View FIGURES 25–34 ). Additionally, median flattened or concave area (internal when carinae to exists) present or absent ( Figs.27–34 View FIGURES 25–34 ). Antennae reaching at least middle part of pronotum when directed backwards; first antennomere 1.6x to more than twice as long as antennomeres 2–3 combined, second antennomere 0.6x to more than 1.0x as long as third antennomere, antennomeres 4–10 transverse, increasing in width toward apical antennomeres, apical antennomere 0.80–1.10x as long as antennomeres 9– 10 combined. Labrum slightly bilobed ( Fig. 54 View FIGURES 53–61 ) or with two lateral teeth and two central teeth ( Fig. 55 View FIGURES 53–61 ). Mandibles less than 0.5x as long as head, with two teeth on left mandible and one tooth on right mandible. First maxillary palpomere shortest; second longest; third shorter (0.5x) to almost as long as apical palpomere; apical palpomere elongate, conical or conically elongate ( Figs.38–40 View FIGURES 35–46 ). First labial palpomere shorter than second and third; second 0.5 to 1.0x as long as apical palpomere; apical palpomere elongate, asymmetrically conical, moderately wide at apex or securiform ( Figs. 44–46 View FIGURES 35–46 ).

Thorax. Pronotum with fine, dense to moderately dense setiferous punctures, except for wide longitudinal impunctate area ( Figs. 5–10 View FIGURES 1–6 View FIGURES 7–10 , 51, 52 View FIGURES 47–52 ); or with very dense umbilicate punctures, except for narrow longitudinal impunctate area ( Figs. 3, 4 View FIGURES 1–6 , 49, 50 View FIGURES 47–52 ); lateral margins slightly sinuate at posterior half; with or without poorly developed depressed area at each side of posterior third ( Figs. 51, 52 View FIGURES 47–52 ); superior line of pronotal hypomeron absent in anterior third, directed ventrad and close to inferior line ( Fig. 58 View FIGURES 53–61 ); pronotal hypomeron with sparse and fine setae on anterior third ( Fig. 58 View FIGURES 53–61 ). Elytra as long as ( Fig. 4 View FIGURES 1–6 ), shorter ( Fig. 3 View FIGURES 1–6 ), or slightly longer than pronotum; some species with horizontal fascia of pale and long setae on anterior fourth of elytra and with similar setae on posterior borders ( Fig. 5 View FIGURES 1–6 ). Prosternum transverse, variably setose. Mesosternum short and wide, surface smooth and with sparse setiferous punctures in foremargin. Metasternum large, with smooth surface and sparse setiferous punctures.

Legs. First legs shorter than middle and third legs; tarsi not expanded, with long and pale setae on ventral surface, setae denser on protarsi than meso and metatarsi; protibiae with spines, spines sparser on meso and metatibiae; additionally, tibiae with brush of pale setae on all lateral borders ( Fig. 61 View FIGURES 53–61 ); first tarsi with fifth tarsomere longest, followed by first and second, which are similar in length, third and fourth shortest; middle and last legs with first and fifth tarsomeres similar in length and longer than second, third and fourth tarsomeres.

Abdomen. Subequal in width to elytra, some species with abdomen wider than elytra; shining; with fine setae as dense as, or denser than on elytra; lateral setae longer than setae on medial area of each segment; genital sternite elongate in males, slightly asymmetrical and bilobed toward apex, wider than genital tergite.

Aedeagus. Variable in shape: elongate; ovally elongate, with base of median lobe notably widened; ovally elongate, with base of median lobe not conspicuously wide; or ovally elongate, with lateral margins of median lobe concave ( Figs. 62–92 View FIGURES 62–77 View FIGURES 78–92 ). Parameres symmetrical or asymmetrical, with right or left paramere shorter than the other ( Figs. 79, 81, 83, 84, 92 View FIGURES 78–92 ).

Comparison. Renda can be separated from Plochionocerus , Agrodes and other similar genera by the following combination of characters: elytra black or almost black in metallic species; temple convex or with one or two temporal carinae, with or without flattened or concave internal area ( Figs. 27–34 View FIGURES 25–34 ); mandibles less than 0.5x as long as head; apical labial palpomere slightly widened toward apex ( Figs. 44, 45 View FIGURES 35–46 ), except in three species with this palpomere securiform at apex ( Fig. 46 View FIGURES 35–46 ); gular sutures convex; superior line of pronotal hypomeron absent in anterior third, directed ventrad and close to lower line ( Fig. 58 View FIGURES 53–61 ); pronotal hypomeron with sparse and fine setae on anterior third ( Fig. 58 View FIGURES 53–61 ); tibiae with brush of pale setae on whole lateral border ( Fig. 61 View FIGURES 53–61 ).