Renda Blackwelder 1952
Creators: name: Márquez, Juan
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Renda

description: Renda Blackwelder, 1952   
(Figs. 3–10)  
 Renda Blackwelder, 1952: 338 (replacement name for Plochionocerus Sharp).   
 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), elongate (Figs. 17–18), or quadrate (Fig. 19), some times narrowed in posterior region (Figs. 14–16); 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); gular sutures variably convex. Temple convex (Fig. 27), or with superior temporal carina (at superior level of eye; Figs. 30, 31), inferior temporal carina (at inferior level of eye; Fig. 32), or both temporal carinae (Figs. 33, 34). Additionally, median flattened or concave area (internal when carinae to exists) present or absent (Figs.27–34). 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) or with two lateral teeth and two central teeth (Fig. 55). 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). 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).   
 Thorax. Pronotum with fine, dense to moderately dense setiferous punctures, except for wide longitudinal impunctate area (Figs. 5–10, 51, 52); or with very dense umbilicate punctures, except for narrow longitudinal impunctate area (Figs. 3, 4, 49, 50); lateral margins slightly sinuate at posterior half; with or without poorly developed depressed area at each side of posterior third (Figs. 51, 52); superior line of pronotal hypomeron absent in anterior third, directed ventrad and close to inferior line (Fig. 58); pronotal hypomeron with sparse and fine setae on anterior third (Fig. 58). Elytra as long as (Fig. 4), shorter (Fig. 3), 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). 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); 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). Parameres symmetrical or asymmetrical, with right or left paramere shorter than the other (Figs. 79, 81, 83, 84, 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); mandibles less than 0.5x as long as head; apical labial palpomere slightly widened toward apex (Figs. 44, 45), except in three species with this palpomere securiform at apex (Fig. 46); gular sutures convex; superior line of pronotal hypomeron absent in anterior third, directed ventrad and close to lower line (Fig. 58); pronotal hypomeron with sparse and fine setae on anterior third (Fig. 58); tibiae with brush of pale setae on whole lateral border (Fig. 61).
description: Published as part of Márquez, Juan, 2010, Revision of the genus Renda Blackwelder, 1952 (Coleoptera: Staphylinidae: Xantholinini) 2686, pp. 1-61 in Zootaxa 2686 (1) on pages 7-10, DOI: 10.11646/zootaxa.2686.1.1, http://zenodo.org/record/10095335