Polletomyia subulata, Curler, 2020

Curler, Gregory, 2020, Descriptions of two new genera of Maruinini (Diptera, Psychodidae, Psychodinae) from the Mitaraka range of French Guiana, Zoosystema 42 (10), pp. 139-149 : 141-144

Polletomyia subulata n. gen., n. sp.

( Figs 1 ; 2 ; 5A )

urn:lsid:zoobank.org:act:E67019D9-A3A3-4A9C-9CC4-CE6279752520

TYPE LOCALITY. — Guyane, Mitaraka.

TYPE MATERIAL. — Holotype. French Guiana • ♂; Mitaraka, site MIT-C-RBF2; 02°14’03.4”N, 54°26’53.0”W; 29 m a.s.l.; lowland rainforest; 27.II-6.III.2015; Marc Pollet leg. (sample code: MITA- RAKA/125), YPT; specimen dissected, mounted on slide; MNHN. Paratypes. French Guiana • 8 ♂, 2 ♀; same data as holotype; YPT; MNHN (4 ♂, 1 ♀), LACM (4 ♂ LACM 340591-340594 , 1 ♀ LACM 340595 ) • 2 ♂, 1 ♀; site MIT-C-RBF2; 02°14’03.4”N, 54°26’53.0”W; 29 m a.s.l.; lowland rainforest; 27.II-5.III.2015; Marc Pollet leg. (sample code: MITARAKA/126); BPT; LACM (♂ LACM 340600-340601 , ♀ LACM 340602 ) • 3 ♂, 2 ♀; site MIT-C-RBF1; 02°14’10.8”N, 54°26’49.5”W; 25 m a.s.l.; lowland rainforest; 27.II-8.III.2015; Marc Pollet leg. (sample code: MITA- RAKA/133); YPT; MNHN (2 ♂, 1 ♀), LACM (1 ♂ LACM 340596 , 1 ♀ LACM 340597 ) • 2 ♀; site MIT-C-RBF1; 02°14’10.8”N, 54°26’49.5”W; 25 m a.s.l.; lowland rainforest; 27.II-8.III.2015; Marc Pollet leg. (sample code: MITARAKA/134); WPT; MNHN • 1 ♂; site MIT-C-RBF1; 02°14’10.8”N, 54°26’49.5”W; 25 m a.s.l.; lowland rainforest; 27.II-8.III.2015; Marc Pollet leg. (sample code: MITARAKA/135); BPT; MNHN • 3 ♂; site MIT-C-RBF2; 02°14’03.4”N, 54°26’53.0”W; 29 m a.s.l.; lowland rainforest; 5-10. III.2015; Marc Pollet leg. (sample code: MITARAKA/137); BPT; MNHN (2 ♂), LACM (1 ♂ LACM 340598 ) • 1 ♀; site MIT-A- RBF2 ; 02°14’12.5”N, 54°27’08.1”W; 28 m a.s.l.; lowland rainforest; 4-10.III.2015; Marc Pollet leg. (sample code: MITARAKA/149); BPT; LACM 340599 .

ETYMOLOGY. — The specific epithet is derived form the Latin word “subulatus”, meaning awl-shaped, in reference to the prominent, spiniform seta inserted at the apex of each gonostylus.

DIAGNOSIS. — See above, Polletomyia n. gen.

DISTRIBUTION. — Currently known from multiple localities in the Mitaraka range of French Guiana.

HABITAT. — Little information regarding specific habitat is available; however, all specimens were collected in lowland rainforest.

DESCRIPTION

Male

Measurements, (N = 5) head width 0.37 mm (0.34-0.40), head height 0.33 mm (0.30-0.34), wing length 1.70 mm (1.64-1.76), wing width 0.44 mm. Head with vertex extended slightly posteriorly, eyebridge comprised of 3 facet rows, contiguous but slightly constricted at median. Antennae: scape cylindrical, about 1.5 times longer than wide; pedicel globular; flagellomeres fusiform, with paired ascoids on f4 f7, single ascoids on f8 f11. Frons and clypeus distinctly divided; frontal scar patch bilobed posteriorly, contiguous medially. Mouthparts inconspicuous, obscured by clypeus, extending slightly beyond apex of palp segment 1; palpi typical of Psychodinae , with apical segment annulated; palp segment proportions: 1, 2, 2.18, 2.18; labellum about as wide as anterior margin of clypeus. Wing: strongly lanceolate; radial and medial fork positioned at a level basal to the apex of CuA; R 5 terminating in C posterior to wing apex; M 2 incomplete at base; CuA conspicuously widened at base. Male terminalia: bilaterally symmetrical; hypandrium flat, band-like, arched posteriorly, fused with gonocoxites laterally; hypandrium in some specimens appearing folded along median ( Fig. 1E ); intersegmental membrane connecting between anterior margin of hypandrium and posterior margin of abdominal segment 8, covering base of ejaculatory apodeme; ejaculatory apodeme dorsoventrally compressed at base, dome-like at center, articulating posteriorly with aedeagal sclerites; aedeagus comprised of four blade-like sclerites ( Fig. 1 E-G) surrounded by a tubular membrane; innermost aedeagal sclerites spathiform, expanding dorsally in extended aedeagus; outer sclerites sinuous, longer than inner sclerites, expanding lateroventrally in extended aedeagus ( Fig. 1F ); parameres dorsoventrally compressed, flat, with pointed, hook-like projection posteromedially; gonostyli tapered gradually from base to apex, curved ventrally along apical half, appearing pitted ventrally; gonocoxites reniform, about two times as long as wide, setose, with setae alveoli laterally and dorsally; gonocoxal apodemes inflated, triangular in dorsoventral view, bulbous in lateral view, with dorsal paramere extending from posterior margin; subepandrial sclerite narrow, band-like, with lateral arms claw-shaped in dorsoventral view, linked to base of epandrial claspers; epandrium rectangular, narrowing posteriorly; epandrial claspers elongate, tapered, curved dorsally from base to apex, with single, setiform tenaculum inserted dorsoapically.

Female

Measurements, (N = 3) head width 0.34 mm (0.32-0.36), head height 0.33 mm (0.32-0.34), wing length 1.84 mm (1.76-1.88), wing width 0.48 mm (0.44-0.52). Head and wing generally as in male; palp segment proportions: 1, 2.50, 3, 3. Terminalia: cerci elongate, heavily sclerotized, spatulate in lateral view, with numerous setae inserted on medial surface; posterior margin of sternum 8 bilobed, oviduct complex, ornate internally ( Fig. 2D ).

Figures

FIG. 1. — Polletomyia subulata n. gen., n. sp.: A, male head, frontal view; B, wing; C, male antennal flagellomeres 3-4, dorsal view; D, male antennal flagellomeres 12-14, dorsal view; E, male terminalia,epandrium removed, dorsal view; F, male terminalia,epandrium removed, aedeagal structure expanded,dorsal view; G, male terminalia, epandrium removed, aedeagal structure partly expanded, ventral view. Abbreviations: see Material and methods. Scale bars: A, 0.25 mm; B, 0.5 mm; C-G, 0.1 mm.

FIG. 2. — Polletomyia subulata n. gen., n. sp.: A, male terminalia, lateral view; B, male epandrium, proctiger and epandrial claspers, dorsal view; C, female terminalia, external structure, ventral view; D, female terminalia, internal structure, ventral view. Abbreviations: see Material and methods. Scale bars: 0.1 mm.

FIG. 5. — Photomicrographs of male wings: A, Polletomyia subulata n. gen., n. sp.; B, Myiomystax trilineata n. gen., n. sp. Scale bars: 0.5 mm