Guajirolus, Flowers, 1985

Kluge, Nikita J., 2019, Systematics of Guajirolus ektrapeloglossa Flowers 1985 (Ephemeroptera: Baetidae), Zootaxa 4564 (2), pp. 531-553 : 538

The taxon Guajirolus /g2, or genus Guajirolus Flowers 1985

( Figs 1–88 )

Genus 3 nr. Pseudocloeon: Roback 1966: 135 , figs 58–63 (larva).

Guajirolus Flowers 1985: 27 (♂ and ♀ imago, larva).

Type species Guajirolus ektrapeloglossa Flowers 1985 .

Diagnosis. Dorsal side of glossa bears a regular transverse row of long, stout setae ( Fig. 37 ). In contrast to Chane , proximal segments of maxillary and labial palps are not greatly shortened, and distal segments of the palps are not greatly elongated, without long filtering setae.

Composition. The genus Guajirolus includes 5 formally described species, among which only two species can be recognized, G. ektrapeloglossa Flowers 1985 and G. rondoni Salles 2007 (see «Discussion» under G. ektrapeloglossa ).

Figures

FIGURES 1–3. Female larvae of Guajirolus ektrapeloglossa from Quebrada Barrigón.

FIGURES 4–11. Labrum of last instar larvae of Guajirolus ektrapeloglossa from Quebrada Barrigón. 4, labrum; 5, exuviae of labrum; 6, longitudinal section of lateral part; 7–8, one and the same median emargination differently compressed; 9–11, fragments of exuviae of one labrum: 9, with focus on distal margin; 10, with focus on dorsal side; 11, detached ventral cuticle (right side at right).

FIGURES 12–16. Mandibles of Guajirolus ektrapeloglossa from Quebrada Barrigón. 12–13 right and left mandibles inside old cuticle before molt from penultimate to last larval instar; 14–15, biting edges of right and left mandibles; 16, lateral part of left mandible.

FIGURES 17–21. Guajirolus ektrapeloglossa from Quebrada Barrigón. 17, maxilla (dorsal view); 18, apex of maxilla (ventral view); 19, distal margin of labrum (dorsal view); 20–21, biting denticles of left and right mandibles. Abbreviations: 1d, distal subsegment of first palpomere; 1p, proximal subsegment of first palpomere; 2, second palpomere; ds1, ds2, ds3, dentisetae; in, incisor; kd, kinetodontium; prs, prostheca.

FIGURES 22–28. Guajirolus ektrapeloglossa from Quebrada Barrigón. 22–23, exuviae of maxillae; 24, maxilla; 25, exuviae of hypopharynx; 26–28, hypopharynx.

FIGURES 29–35. Labium of Guajirolus ektrapeloglossa from Quebrada Barrigón. 29–31, labium (29, ventral view; 30–31, in translucent light, with focus on glossae and on palps); 32–33, one and the same labial palp differently compressed; 34–35, left and right labial palps of one and the same individual.

FIGURES 36–40. Setation of labium of Guajirolus ektrapeloglossa from Quebrada Barrigón. 36, exuviae of glossae and paraglossa (focus on ventral side); 37, glossae (focus on dorsal side); 38–40, exuviae of palp and paraglossa (38, 40, focus on ventral side; 39, focus on dorsal side).

FIGURES 41–43. Larval thorax of Guajirolus ektrapeloglossa from Quebrada Barrigón. 41, exuviae of left half of pronotum and mesonotum; 42, posterior margin of mesonotum and protoptera; 43, exuviae of sterna and pleura (fore leg turned anteriorly, middle and hind legs detached). Abbreviations: abd1, first abdominal tergum; msth, mesothorax; mtth, metathorax; prth, prothorax.

FIGURES 44–50. Larval legs of Guajirolus ektrapeloglossa from Quebrada Barrigón. 44–45, fore and middle legs of darkest specimen; 46–47, claws; 48, fragment of fore femur (focus on anterior side); 49, fragment of fore tibia (focus on anterior side); 50, fragment of hind tibia (focus on posterior side).

FIGURES 51–58. Larval coloration of Guajirolus ektrapeloglossa from Quebrada Barrigón.

FIGURES 59–69. Larvae of Guajirolus ektrapeloglossa from Quebrada Barrigón. 59, middle part of cercus; 60–61, scales on abdominal terga; 62, posterior margin of tergum II; 63, posterior margin of tergum VIII; 64, posterior margin of sternum VIII; 56, posterior margin of sternum IX of female; 66, tergalii VI–VII; 67–68, tergalius III; 59, paraprocts.

FIGURES 70–74. Guajirolus ektrapeloglossa from Quebrada Barrigón. 70–71, male imagines; 72, subimaginal exuviae of left half of mesonotum; 73, subimaginal exuviae of left half of meso- and metapleuron; 74, subimago extracted from larval exuviae.

FIGURES 75–80. Male genitals of Guajirolus ektrapeloglossa from Quebrada Barrigón. 75, genital of imago (ventral view; muscles and internal parts of penis shown by interrupted lines; right gonostylar and gonovectal muscles not shown); 76, subimaginal genitals developing under larval cuticle; 77–78 and 79–80, genitals of two specimens. Abbreviations: 1, 2, 3, segments of gonostylus; pgs, larval protogonostylus; usg, unistyliger.

FIGURES 81–82. Female imagines of Guajirolus ektrapeloglossa from Quebrada Barrigón.

FIGURES 83–88. Eggs of Guajirolus ektrapeloglossa. 83–85, from Quebrada Barrigón (Panama); 86–88, from Rio Sotorani (Peru).