Euryphlegon degallieri ( Muona, 1985 ) Otto, 2017

Otto, Robert L., 2017, A revision of Phlegoninae (Coleoptera: Eucnemidae), with descriptions of a new genus and four new species, Insecta Mundi 2017 (569), pp. 1-27 : 11-12

Euryphlegon degallieri ( Muona, 1985) comb. nov.

Fig. 26–32

Phlegon degallieri Muona, 1985: 321–323

Diagnosis. Dark brown dorsum along with the distribution in French Guiana distinguish E. degallieri from both E. jacqueschassaini and E. parallelus .

Specimens Examined. Five specimens, including the holotype, were available for study: FRENCH GUIANA: 1 ♂, “ GUYANA FRANC., Isle de Cayenne, Cabassou, (Piège eumineux)” (handwritten) / “en canopèe, Fin X.1979, N. DEGALLIER” (handwritten) / “Museo Civico, di Genova” (grey; typed label) / “ HOLOTYPE, Phlegon , degallieri n. sp., Muona des. 1984” (pink label; genus, species and year handwritten) / “ HOLOTYPUS, Phlegon , degallieri ” (light reddish label; genus and species handwritten) (MSNG); 1 ♂, “Guyane francaise, Mtgne, des Chevaux, RN2 PK22, Roura 16.11.2008 SEAG” / “Piège intercept, à vitre” / “Collection of the Global, Eucnemid Research Project, (Robert L. Otto)” (greenframed white label) / “ Phlegon ♂, degallieri Muona, J. Chassain det. 2016” (genus, species, author, sex symbol and year handwritten) / “ Euryphlegon , degallieri, (Muona) , Det. R.L. Otto 2016” (GERP); 1♀, “Guyane – Mgne des, Chevaux SEAG” / “Piège SLAM, 17 Septbre 2012” (“L” handwritten over “P”; “M” handwritten) / “Collection of the Global, Eucnemid Research Project, (Robert L. Otto)” (green-framed white label) / “ Phlegon ♀, degallieri Muona, J. Chassain det. 2016” (genus, species, author, sex symbol and year handwritten) / “ Euryphlegon , degallieri, (Muona) , det. R.L. Otto, 2016” (GERP); “Matiti, 30 km NNW Cayenne, 5°3’N 52°36’W, September 2014, Jean Louis Giuglaris leg.” (JMC); “Matiti, 30 km NNW Cayenne, 5°3’N 52°36’W, November 2014, Jean Louis Giuglaris leg” (JMC).

Redescription. ♂: length 8.0– 8.5 mm, width, 3.0 mm. ♀: length 9.5 mm, width, 3.0 mm. Body oblong, elongate; uniformly dark brown; antennae and legs dark brown; head, pronotum and elytra clothed with short, recumbent yellowish setae ( Fig. 26–27 ).

Head: Subspherical, with variably delicate median carina at vertex extending down to frons; surfaces shiny, punctures closely spaced; apical margin of frontoclypeal region rounded, about 2 times wider than base; mandibles stout, bidentate, densely punctate.

Antennae: ♂ ( Fig. 28 ): Antennomeres IX–XI capitate, about 2/3 of body length; antennomere III longer than wide, slightly longer than II; antennomeres IV–V slightly longer than wide; antennomeres VI–VIII subequal, quadrate; antennomeres IX–XI each much longer than wide, without lateral carina, each as long as combined length of V–VIII; antennomere X slightly shorter than either IX or XI; antennomere XI somewhat asymmetrical, slightly bent apically. ♀ ( Fig. 29 ): Antennomeres IX–XI capitate, about 1/2 of body length; antennomere III longer than wide, slightly longer than II; antennomeres IV–V slightly longer than wide; antennomeres VI–VIII subequal, quadrate; antennomeres IX–XI each much longer than wide, without lateral carina; antennomere IX slightly longer than either X or XI, as long as combined length of IV–VII; antennomeres X and XI subequal, each shorter than IX, each as long as combined length of IV–VI.

Pronotum: Surfaces shiny, densely punctate; longer than wide, with moderate, sharp hind angles; parallel-sided in female, parallel-sided to slightly arcuate in males; disc convex, with delicate median carina and slightly round fovea above base; base sinuous.

Scutellum: Longer than wide, subtriangular and distally truncate to bilobed.

Elytra: Striae indicated as smooth lines at humeri, punctate elsewhere, somewhat obscured in middle; interstices flattened; surfaces shiny, transversely rugose; apices with six deep, round cavities in males ( Fig. 30 ), female with two rows of small, round cavities in deep, parallel grooves near elytral suture.

Legs: First tarsomere as long as combined length of remaining four on meso- and metatarsi; tibiae rounded in cross section; metatarsomeres I–III simple; metatarsomere IV excavated, as wide as III; metatarsomere V elongate; pretarsal claws simple.

Venter: Closely punctate, with elongate, recumbent yellowish setae; hypomeron simple, without lateral antennal grooves; metepisterna parallel-sided; metacoxal plates medially 3.0–6.0 times wider than laterally.

Aedeagus ( Fig. 31 ): Basal piece short, bilobed, dorsally open; remaining parts elongate, laterally constricted at base of lateral lobes, apically bilobed; median lobe elongate, narrow, apically rounded; lateral lobes curved, elongate, apically hooked.

Distribution. Taken from several localities in French Guiana.

Biology. One specimen was taken from a tree canopy. A second specimen was taken from a window flight intercept trap. Chassain and Touroult (2011) reported finding the species to be relatively common in the country. Larvae and pupae are unknown.

Note. I examined the holotype and observed the presence of a lateral spine on the scape just below the attachment of the pedicel, and lateral clusters of spine combs at the apices of the protibiae. Both features are absent in Phlegon . The species is transferred to Euryphlegon from Phlegon based on the presence of these features. The apical spur on the protibiae is obscured by the adhesive used to secure the holotype on the glue board. A male specimen ( Fig. 32 ) in GERP was compared to the holotype.

Figures

Figures 26–32. Euryphlegon degallieri (Muona). 26) Male holotype (MSNG), dorsal habitus. 27) Female (GERP), dorsal habitus. 28) Male holotype antenna (MSNG), dorsal view. 29) Female antenna (GERP), dorsal view. 30) Male holotype elytral apices (MSNG), dorsal view. 31) Aedeagus of holotype, dorsal view. 32) Male specimen (GERP), dorsal habitus. (Scale: 26–27, 32 = 5.0 mm; 28–31 = 1.0 mm)