Renda Blackwelder, 1952

Klemann-Junior, Louri, Barroso, Paulo Ricardo Ramires & Márquez, Juan, 2025, New species and new records of Renda Blackwelder, 1952 (Coleoptera: Staphylinidae: Xantholinini) from Brazil, with an updated key to the species of the genus, Zootaxa 5693 (2), pp. 243-260 : 245-259

Genus Renda Blackwelder, 1952

To include R. aneba sp. nov., R. boiuna sp. nov., and R. carauariense sp. nov., the taxonomic key proposed by Márquez (2010) is modified as follows (“M” before figure number refers to Márquez, 2010):

1. Pronotum with dense umbilicate punctures, except for narrow longitudinal impunctate area ( “formicaria ” species group; Figs. M3 , M 4 , M49, M50)................................................................................... 2

1´. Pronotum with fine punctures (commonly; Figs. M5–M 10, M51, M52) or shallow umbilicate punctures (just one species; Fig. 5D ) moderately dense, except for wide longitudinal impunctate area............................................ 10

2 (1). Head not posteriorly narrowed (Figs. M11, M12)............................................................ 3

2´. Head posteriorly narrowed (Fig. M15)..................................................................... 8

3 (2). Head with temple convex (Figs. M27–M29); aedeagus ovally elongate, base of median lobe not conspicuously widened, with constricted lateral margins (Figs. M66, M68)............................................................... 4

3´. Temple of head with one or two temporal carinae (Figs. M30–M34); aedeagus oval, base of median lobe notably widened, lateral margins not constricted (Figs. M65, M67, M69)....................................................... 5

4 (3). Elytra shorter than pronotum (0.8–0.9x; Fig. 3 ); body with few long yellow setae; small aedeagus, internal sac with weakly sclerotized structures (Fig. M66).............................................................. R. brachyptera

4´. Elytra as long as pronotum; body with dense long yellow setae; elongate aedeagus, internal sac with sclerotized structures moderately visible (Fig. M68)................................................................. R. formicaria

5 (3). Temple of head with inferior temporal carina (below eye; Fig. M32); ventral surface of head slightly convex; apical maxillary palpomere 1.50–1.75x as long as preapical palpomere; internal sac of aedeagus with sclerotized structures (Figs. M67, M69)............................................................................................... 6

5´. Temple of head with superior and inferior temporal carinae (above and below eye, respectively; Fig. M34); ventral surface of head clearly convex; apical maxillary palpomere 1.76–2.00x as long as preapical palpomere; internal sac of aedeagus with weakly sclerotized structures (Fig. M65).......................................................... R. bicarinata

6 (5). Ventral surface of head with dense umbilicate punctures separated by less than twice their width (Fig. M24); anterior half of pronotum without small impunctate areas lateriad of median longitudinal impunctate area; aedeagus less than 4 mm of total length, with long parameres (more than 0.35x the length of median lobe)......................................... 7

6´. Ventral surface of head with moderately dense umbilicate punctures separated by 2–3x their width (Fig. M23); anterior half of pronotum with small impunctate areas lateriad of median longitudinal impunctate area; aedeagus 4.24 mm in total length, with short parameres (0.29x the length of median lobe; Fig. M69)........................................ R. grandipenis

7 (6). First antennomere nearly twice the length of antennomeres 2–3 combined; apical antennomere slightly shorter than antennomeres 9–10 combined (proportion 0.93x); elytra as long as pronotum; aedeagus 3.55 mm in length, with shorter parameres (0.39x the length of median lobe; Fig. M67)............................................................. R. flagellicornis

7´. First antennomere 1.5x the length of antennomeres 2–3 combined; apical antennomere as long as antennomeres 9–10 combined; elytra slightly shorter than pronotum (0.94x); aedeagus 2.16 mm of length, with large parameres (0.85x the length of median lobe; Figs. 2D–G )........................................................................ R. aneba sp. nov.

8 (2). Head with temple convex (Fig. M27); ventral surface of head clearly convex; eyes long (0.33x as long as head and interocular distance 0.57x as wide as head measured at eye level); apical maxillary palpomere conically elongate, twice as long as preapical palpomere (Fig. M39); pronotum with wide, smooth longitudinal central area (Fig. M50); prosternum with fine carinate longitudinal line on anterior half (male unknown)................................................. R. glabrinotum

8´. Temple of head with superior and/or inferior temporal carinae (Figs. M30–M32); ventral surface of head slightly convex; eyes smaller (0.22–0.28x as long as head and interocular distance 0.66–0.68x as wide as head); apical maxillary palpomere elongate, 1.86–1.87x as long as preapical palpomere (Fig. M38); pronotum with narrow longitudinal impunctate central area (Figs. M51, M52); prosternum without longitudinal carinate line.......................................................... 9

9 (8). Temple of head with superior temporal carina and a flattened area (Fig. M30); eyes 0.22x as long as head; ventral surface of head with moderately dense umbilicate punctures separated by 2–3x their width (Fig. M23); apical area (from insertion of parameres to apex of median lobe, sensu Asiain et al. 2007) of median lobe of aedeagus 0.3x as long as total length of median lobe, internal sac with weakly sclerotized structures (Fig. M70).................................. R. profundepunctata

9´. Temple of head with inferior temporal carina and a moderately deep concave area (Fig. M32); eyes 0.28x as long as head; ventral surface of head with dense umbilicate punctures separated by twice or less their width (Fig. M24); apical area of median lobe of aedeagus 0.14x as long as total length of median lobe, internal sac with moderately visible sclerotized structures (Fig. M71)......................................................................................... R. sharpi

10 (1). Body with metallic green or blue color, or at least somewhat metallic; apical antennomere at least 1.1x the length of antennomeres 9–10 combined; elytra with fascia of long and pale setae at anterior quarter, fascia as wide as or slightly wider than scutellum ( Fig. M5 ); labrum with two pairs of teeth, the central pair longest (Fig. M55) ( “fasciata ” species group)................ 11

10´. Body black, not metallic; apical antennomere subequal to or shorter than antennomeres 9–10 combined (1.07x or less); elytra without fascia of long and pale setae; labrum bilobed (Fig. M54)............................................... 15

11 (10). Head oval, notably narrowed posteriorly (Fig. M14); temple convex (Figs. M27, M28)............................. 12

11´. Head ovally elongate, not posteriorly narrowed (similar to Figs. M17–M18), or if posteriorly narrowed, with head elongate (Fig. M16); temple of head with one or two carinae (Figs. M30–M34).......................................... 13

12 (11). Temple of head flattened (Fig. M28); dorsal surface of head clearly convex; ventral surface of head with slightly dense umbilicate punctures separated by 3x their width (Fig. M22); pronotum shorter than elytra (0.87x as long), without depressed areas at each side of posterior third; aedeagus small and elongate (Fig. M76).......................... R. simplicephala

12´. Temple of head slightly to moderately concave area (Fig. M29); dorsal surface of head slightly convex; ventral surface of head with moderately dense umbilicate punctures separated by 2–3x their width (Fig. M23); pronotum as long as elytra (0.92x), with depressed area at each side of the posterior third (Fig. M51); aedeagus elongate, with base of median lobe widened (Fig. 73).............................................................................. R. fasciata

13 (11). Head elongate and posteriorly narrowed (Fig. M16); tempora of head with superior temporal carina and a slightly to moderately deep concave area (Fig. M31); mandibles with external channel; ventral surface of head with sparse umbilicate punctures separated by 3x their width (Fig. M22); aedeagus with long parameres (0.51x as long as median lobe), internal sac with sclerotized structures (Fig. M75)................................................................. R. leprieuri

13´. Head ovally elongate, not posteriorly narrowed (similar to Figs. M17, M18); tempora of head with superior and inferior temporal carinae and a slightly deep concave area (Fig. M34); mandibles with external channel poorly developed; ventral surface of head with dense umbilicate punctures separated by 2–3x their width (Fig. M23); aedeagus with short parameres (0.48x or less as long as median lobe), internal sac with weakly sclerotized structures (Figs. M72, M74)................................. 14

14 (13).Body black with metallic reflection; ventral surface of head slightly convex; pronotum with depressed area clearly visible at each side of posterior third (Fig. M51); aedeagus small, elongate, with parameres and apical area of median lobe long (0.48x and 0.45x as long as median lobe, respectively), internal sac of aedeagus with weakly sclerotized structures (Fig. M74)................................................................................................. R. fulgida

14´. Body metallic green or blue; ventral surface of head clearly convex; pronotum with depressed area poorly developed at each side of posterior third; aedeagus large, ovally elongate, with short parameres and apical area of median lobe (0.29x and 0.26x as long as median lobe, respectively), internal sac of aedeagus with sclerotized structures moderately visible (Fig. M72)................................................................................................ R. cyanea

15 (10).Apical maxillary palpomere conical, 1.00–1.29x as long as preapical palpomere (Fig. M40) ( “minor ” species group)..... 16

15´. Apical maxillary palpomere elongate or conically elongate, 1.42 to more than twice as long as preapical palpomere (Figs. M38, M39).............................................................................................. 24

16 (15).Pregenital and genital segments of abdomen, and posterior border of fifth visible abdominal segment yellow to reddish brown............................................................................................. 17

16´. Genital segment and posterior border of pregenital segment of abdomen reddish brown............................. 18

17 (16).Head ovally elongate (similar to Fig. M17); ventral surface of head clearly convex; apical antennomere nearly as long as antennomeres 9–10 combined (proportion 0.94x); pronotum 1.41x as long as wide and shorter than elytra (0.83x); aedeagus elongate, with symmetrical parameres and internal sac with weakly sclerotized structures (Fig. M77).......... R. brasiliana

17´. Head oval quadrate (similar to Fig. M19); ventral surface of head slightly convex; apical antennomere shorter than antennomeres 9–10 combined (proportion 0.85x); pronotum 1.38x as long as wide and nearly as long as elytra (0.97x); aedeagus ovally elongate, with base of median lobe widened, right paramere longer than left paramere and internal sac with sclerotized structures (Fig. M78)..................................................................................... R. debilis

18 (16).Head ovally elongate (length/width proportion 1.27–1.37x; similar to Fig. M17).................................. 19

18´. Head oval quadrate (length/width proportion 1.14–1.22x; similar to Fig. M19).................................... 21

19 (18).Head slightly convex dorsally; first antennomere 1.59–1.67x as long as antennomeres 2–3 combined; ventral surface of head with moderately dense umbilicate punctures separated by 2–3x their width (Fig. M23); pronotum 1.38–1.46x as long as wide; parameres asymmetrical, apical area of median lobe 0.22–0.32x as long as total length of median lobe (Figs. M83, M84).. 20

19´. Head clearly convex dorsally; first antennomere 1.73–1.95x as long as antennomeres 2–3 combined; ventral surfaces of head with very dense umbilicate punctures separated by less than twice their width (Fig. M24); pronotum 1.69–1.76x as long as wide; parameres symmetrical, apical area of median lobe 0.14x as long as total length of median lobe (Fig. M80).................................................................................................... R. longiceps

20 (19).Second antennomere longer than third antennomere (proportion 1.19x); pronotum 1.38x as long as wide; aedeagus ovally elongate, with base widened, left paramere longer than right paramere, 0.22x as long as median lobe, internal sac with sclerotized structures (Fig. M84)........................................................................ R. raulmunizi

20´. Second antennomere shorter than third antennomere (proportion 0.80–0.93x); pronotum 1.46x as long as wide; aedeagus elongate, with right paramere longer than left paramere, 0.32x as long as median lobe, internal sac with weakly sclerotized structures (Fig. M83)........................................................................... .. R. nitida

21 (18).Head with temple flattened (Fig. M28); apical antennomere shorter than antennomeres 9–10 combined (proportion 0.84–0.90x); aedeagus large (more than 3 mm), ovally elongate, with base widened, internal sac with sclerotized structures (Fig. M81)..................................................................................................... 22

21´. Head with temple convex (Fig. M27); apical antennomere nearly as long as antennomeres 9–10 combined (proportion 0.91– 0.97x); aedeagus small (length 1.33 mm), elongate, internal sac with weakly sclerotized structures (Figs. M79, M82)..... 23

22 (21).Head square oval shape (similar to Fig. M11); ventral surface of head with umbilicate punctures smaller and denser than in R. boiuna ; punctures on ventral surface of head with same size than on lateral and dorsal surfaces; median lobe of the aedeagus without well-marked neck below insertion of parameres, right paramere smaller than left paramere...... R. mesoamericana

22´. Head square shape ( Fig. 3B ); ventral surface of head with large umbilicate punctures, sparser than in R. mesoamericana ; punctures on ventral surface of head larger than on lateral and dorsal surfaces; median lobe of aedeagus narrow and with well-marked neck just below insertion of parameres, left paramere smaller than the right paramere ( Figs. 4D–G ).................................................................................................... R. boiuna sp. nov.

23 (21).Total body length 11.9–14.5 mm; head slightly expanded toward posterior corners, dorsally faintly convex, ventrally clearly convex; pronotum 1.38x as long as wide; right paramere longer than left paramere, 0.4x as long as median lobe (Fig. M79)............................................................................................. R. lescheni

23´. Total body length 11.3–12.8 mm; head not expanded toward posterior corners, clearly convex dorsally, ventrally slightly convex; pronotum 1.41x as long as wide; aedeagus with symmetrical parameres, 0.29x as long as median lobe (Fig. M82)................................................................................................ R. minor

24 (15).Apical labial palpomere securiform (Fig. M46) ( “palpalis ” species group)....................................... 25

24´. Apical labial palpomere moderately expanded toward apex, or conical (Figs. M44, M45) ( “fimetaria ” species group)..... 27

25 (24).Total body length 17.1 mm; dorsal surface of head slightly convex; head with temple convex (Fig. M27); pronotum with wide and conspicuous, but not umbilicate punctures; male unknown......................................... R. palpalis

25´. Total body length less than 16.1 mm; dorsal surface of head clearly convex; temple of head with one or two temporal carinae and a flattened or concave area (Figs. M30–M34); pronotum with fine punctures; male known....................... 26

26 (25).Head oval quadrate (length/width proportion 1.10–1.17x; Fig. M19); tempora of head with inferior temporal carina and a deep, concave area (similar to Fig. M32); ventral surface of head clearly convex; eyes long (0.39x as long as head) and wide (interocular distance 0.57x the cephalic width, measured at eye level); pronotum with depressed area poorly developed at each side of posterior third; aedeagus ovally elongate, with apical area of median lobe 0.24x as long as total length of median lobe (Fig. M92)................................................................................ R. ophthalmica

26´. Head oval (length/width proportion 1.22–1.28x; Fig.M13); tempora of head with superior and inferior temporal carinae and a flattened area (Fig. M33); ventral surface of head slightly convex; eyes shorter (0.29x as long as head) and less wide (interocular distance 0.66x as wide as head width measured at eye level); pronotum without depressed areas; aedeagus elongate, with apex of median lobe 0.15x as long as total length of median lobe (Fig. M91).................................. R. julietarum

27 (24).Apical maxillary palpomere conically elongate (Fig. M39); pronotum without depressed area at each side of posterior third.................................................................................................... 28

27´. Apical maxillary palpomere elongate (Fig. M38); pronotum with depressed area at each side of posterior third moderately visible............................................................................................. 30

28 (27).Head with temple convex (Fig. M27); pronotum longer than elytra (proportion 1.24x); second antennomere as long as third antennomere; male unknown.................................................................. R. brevipennis

28´. Temple of head with superior and inferior carinae (Figs. M33–M34); second antennomere shorter than third antennomere (proportion 0.89–0.91x); pronotum as long as elytra (proportion 1.00–1.07x)..................................... 29

29 (28).Head oval, narrowed posteriorly (similar to Fig. M14), 1.41x as long as wide; ventral surface of head clearly convex; eyes 0.27x as long as head, interocular distance 0.61x cephalic width at eye level; apical antennomere 1.1x as long as antennomeres 9–10 combined; apical maxillary palpomere 1.75x as long as preapical palpomere........................ R. fimetariamimus

29´. Head ovally elongate, not narrowed posteriorly (Fig. M18), 1.32–1.44x as long as wide; ventral surface of head slightly convex; eyes 0.33x as long as head, interocular distance 0.58x cephalic width (at eye level; Figs. M9, M18); apical antennomere nearly as long as antennomeres 9–10 combined (proportion 0.91x); apical maxillary palpomere 1.82x as long as preapical palpomere................................................................................. R. fimetaria

30 (27).Pronotum with shallow umbilicated punctures ( Fig. 5D ), giving impression of thin, sparse punctures; elytra with umbilicated punctures similar to pronotum but denser than it ( Fig. 5E ); aedeagus oval elongated, with constricted lateral margins; total length 1.46–1.56 mm; parameres 0.48x length of median lobe; apical area of median lobe 0.22x total length of median lobe; internal sac with sclerotized structures ( Figs. 6D–G )...................................... R. carauariense sp. nov.

30´. Pronotum and elytra with dense, fine punctures; aedeagus not exactly as in previous species, with total length more than 1.70 mm............................................................................................... 31

31 (30).Head oval, narrowed posteriorly (similar to Figs. M14, M15); head with temple convex (Fig. M27); ventral surface of head slightly convex; pronotum 0.87x as long as elytra; aedeagus ovally elongate, with base notably widened (Fig. M85)................................................................................................... R. brendelli

31´. Head oval or oval quadrate, not narrowed posteriorly (similar to Figs. M11–M13, M17–M19); temple of head with superior and inferior carinae (Figs. M33–M34); ventral surface of head clearly convex; pronotum as long as elytra (proportion 0.99–1.00x); aedeagus ovally elongate, base not strongly widened (Figs. M86, M87, M90)..................................... 32

32 (31).Head slightly convex dorsally; antennomere 2 shorter than antennomere 3 (proportion 0.87x); apical antennomere 1.16x as long as wide; ventral surface of head with moderately dense umbilicate punctures separated by 2–3x their width (Fig. M23); aedeagus with left paramere longer than right paramere, 0.23x total length of median lobe, apical area of median lobe 0.11x as long as total length of median lobe, internal sac with sclerotized structures (Fig. M87)..................... R. clavicornis

32´. Head clearly convex dorsally; antennomere 2 as long as antennomere 3; apical antennomere as long as wide; ventral surface of head with sparse umbilicate punctures separated by more than 3x their width (Fig. M22) or dense separated by less than twice their width (Fig. M24); aedeagus with symmetrical parameres (Figs. M86, M90), 0.36–0.42x as long as median lobe, apical area of median lobe 0.21–0.23x as long as total length of median lobe, internal sac with weakly sclerotized structures..... 33

33 (32).Head oval (1.23–1.30x longer than wide; similar to Fig. M13); eyes 0.30x as long as head; ventral surfaces of head with dense umbilicate punctures separated by less than twice their width (Fig. M24); pronotum with fine punctures; prosternum with longitudinal, fine carina on anterior half........................................................ R. cariniventris

33´. Head oval quadrate (1.18–1.22x longer than wide; similar to Fig. M19); eyes 0.33x as long as head (measured from middle); ventral surface of head with sparse umbilicate punctures separated by more than 3x their width (Fig. M22); pronotum with wide and conspicuous but not umbilicate punctures; prosternum without longitudinal carina..................... R. pronotalis

Note: name correction (due to lapsus calami) made by Márquez and Asiain (2014: 297) to the currently valid name Renda julietarum .

Figures

FIGURE 2. Renda aneba sp. nov. Holotype; A. Antenna; B. Head (lateral view); C. Prosternum; D–G. Aedeagus: D. Lateral view; E. Parameral view; F. Antiparameral view; G. Apex of median lobe in lateral view.

FIGURE 3. Renda boiuna sp. nov. Holotype; A. Habitus; B. Head (dorsal view); C. Head (ventral view); D. Pronotum; E. Elytra.

FIGURE 4. Renda boiuna sp. nov. Holotype; A. Antenna; B. Head (lateral view); C. Prosternum; D–G. Aedeagus: D. Lateral view; E. Parameral view; F. Antiparameral view; G. Apex of median lobe in lateral view.

FIGURE 5. Renda carauariense sp. nov. Holotype; A. Habitus; B. Head (dorsal view); C. Head (ventral view); D. Pronotum; E. Elytra.

FIGURE 6. Renda carauariense sp. nov. Holotype; A. Antenna; B. Head (lateral view); C. Prosternum; D–G. Aedeagus: D. Lateral view; E. Parameral view; F. Antiparameral view; G. Apex of median lobe in lateral view.