Hirtodrosophila florida, Grimaldi, 2018

Grimaldi, David A., 2018, Hirtodrosophila Of North America (Diptera: Drosophilidae), Bulletin of the American Museum of Natural History 2018 (421), pp. 1-1 : 1-

Hirtodrosophila florida , new species

Figures 5 , 15D , 22 , 23

DIAGNOSIS: Face and antennae light, cream colored, frons slightly darker but with lateral areas whitish, pollinose; scutum, scutellum, abdominal tergites very light brown; anterior portion of scutum with pair of faint, short, light stripes; pleura, legs, halter entirely light, cream colored. Basal flagellomere with short setulae; head relatively narrow (HW/HD 1.20), frons relatively wide (frontal index 1.11), eye deep (ED/EW 1.56), face deep (FD/FW 1.20); wing relatively short (ThL/WL 0.51). Male: Epandrium dorsally long; cerci large, broad, flat; aedeagus straight, apex with basal flap having fine, irregular serrations. Female: Oviscapt with preapical vertical row of 4 pegs, strongly projecting apical lobe with two large pegs; spermatheca unique, barely sclerotized, slender and fusiform, no introvert, with slight transverse wrinkles.

DESCRIPTION: Coloration: Head mostly light, frons tan in middle, slightly pollinose; fronto-orbital plates lighter, pollinose white; margins of frontal vittae and ocellar triangle barely differentiated; narrow triangle of light brown at base of verticals. Face light, cream colored, including carina, oral margin not darkened; vibrissal angle and anterior portion of cheek beneath eye dark brown. Antenna entirely light, cream colored; branched portion of arista dark. Mouthparts: clypeus and outer surface of labellum light brown, palp darker brown, rest of proboscis light. Eye dull red. Thorax: Scutum and scutellum light brown; scutum with pair of faint, paramedian light stripes anteriorly (between tangents of dorsocentrals), bright spots at anterior end of stripes. Pleura, legs, halter entirely light, cream colored; edge between dark scutum and light pleura at notopleural suture is diffuse, not discrete. Wing hyaline, without markings; apex of C at Sc break slightly darkened, small dark node about midway along Sc. Abdomen with tergites, cerci light brown, lighter than notum; sternites light, cream colored, as for pleural membrane.

Head: Antenna: Scape well exposed, with setulae; pedicel with setulae, 2 larger setae; basal flagellomere relatively long, tip almost reaching oral margin, with short setulae only; arista with 6 long dorsal branches, 1 ventral branch, opposite d6. Eye oblong, tall and narrow in lateral view, with short, dense interfacetal setulae. Face very slightly concave; carina small, narrow, on upper 0.65× of face, oral margin very slightly concave. One pair vibrissae, subvibrissal setulae much smaller. Frons: Fronto-orbital plates, frontal vittae, ocellar triangle matte, margins between them not differentiated. Fronto-orbital setae: proclinate slightly shorter than posterior reclinate; anterior reclinate ca. 0.6× length of proclinate; posterior reclinate slightly closer to proclinate than to verticals; proclinate slightly medial to tangent formed by line through ipsilateral reclinates and inner vertical. Tip of ocellar seta reaching to anterior reclinate; postocellar setae ca. 0.5× length of ocellar, varying from parallel to tips crossed. Inner vertical setae upright, inclinate; outer vertical setae lateroclinate, pointing slightly posteriad; verticals approximately equal in length.

Head measurements (N = 2): CD/ED 0.15, ED/EW 1.56 (1.51, 1.61), FD/FW 1.20 (1.13, 1.27), FL/LFW 1.11 (1.03, 1.20), HW/HD 1.20, Ocellar S-index 1.05 (0.93, 1.18), OR2/OR1 0.57, VT-index 1.13.

Thorax: Acrostichal setae in 6 rows; 1 to 2 enlarged acrostichals just anterior to transverse suture. Anterior dorsocentral finer than and ca. 0.8× length of posterior dorsocentral; posterior dorsocentral midway between anterior dorsocentral and scutellar margin. Postpronotal lobe with 2–3 setae; 3 notopleural setae (dorsal one longest); 2 supra-alar setae, anterior one short; 2 postalar setae; katepisternum with one large seta (posterior katepisternum), anterior katepisternum fine, ca.0.4× length of other, a minute seta between these. Legs: Forefemur with ventral row of 4 setae, lateral row 4 setae, none longer than thickness of femur; mid- and hind femora without large setae. Male foretarsus without fine, erect setulae on dorsal surface; midtibia with large ventroapical seta, hind tibia with short, fine preapical dorsal seta.

Thorax and wing measurements (N = 4): ThL 1.00 mm (0.96–1.04), DC-index 0.72, S-index 0.40 (0.38–0.41), 4-V index 1.86 (1.82–1.95), 5-X index 1.70 (1.57–1.85), C-index 1.85 (1.70–1.92), hb-index 1.74 (1.58–1.81), ThL/WL 0.51 (0.49, 0.53), WL/WW 2.20 (2.19–2.22).

Male Terminalia: Epandrium with dorsal portion elongate, microtrichia overall except for ventral lobes; ca. 15 setae in lateral row, longest ones dorsally, more numerous on ventral lobe; ventral lobe of epandrium short, broad, ends just below dorsal margin of surstylus. Subepandrial sclerite large, broadly arched with a small projecting lobe on posterior margin. Cercus large, broad, flattened, follows curvature of epandrial dorsum; slightly less sclerotized than epandrium; ventral margin of cercus oblique, slopes downward from middle laterad; microtrichia very sparse (on dorsal portion only), setae long, fine setulae in row on ventral margin. Surstylus pendulous, simple (no secondary lobes), dorsal portion covered by ventral epandrial lobe; dorsal row of 6 prensisetae pegs laterally, all other (ca. 15) prensisetae thick and setiform. Hypandrium well developed, relatively long; posterior lobes very light, membranous, without wrinkles, paraphyses with minute medial pair of setulae, large subapical seta. Aedeagus virtually straight in lateral view, with thicker apex; gonopore with slight rim, ledge or flap anterior to gonopore having fine, irregular serrations; fine, sparse scales on dorsal surface of aedeagal shaft. Aedeagal apodeme short, ca. 0.5× length of aedeagus, slender in lateral view.

Female Terminalia: Oviscapt with apex highly modified: preapical vertical row of 4 small pegs; ventral lobe with two large pegs projecting terminally, horizontal row 8 minute pegs anterior to lobe along ventral margin. Oviprovector well developed; semicircular dorsally, with overlapping scales on dorsal margin appearing like saw teeth; scales abundant overall, overlapping. Spermatheca unique: hardly sclerotized; slender, roughly fusiform in shape; no introvert; with fine transverse wrinkles.

TYPE: Holotype, male. USA: Florida: Dade Co., near Homestead, 30/VI/92, D. Grimaldi. Not dissected, in AMNH.

OTHER SPECIMENS EXAMINED: USA: Florida: Dade Co., near Homestead, 30/VI/92, D. Grimaldi, on mushroom, 1♀ (dissected, no. 75), 2♂ (1 dissected, no. 59). Homestead, VII/31/59, W.B. Heed, 1♂ ( AMNH).). All are paratypes ( AMNH).

ETYMOLOGY: In reference to the state of the type locality, as a noun in apposition.

COMMENTS: I have not found this species in any material from the Caribbean, though most of the drosophilid collections I have examined are from Hispaniola, Puerto Rico, and the Virgin Islands, some from the Lesser Antilles, few from Cuba and Jamaica.

Figures

FIG. 5. Hirtodrosophila florida, new species (female). A. Head, frontal. B. Habitus, lateral. C. Thorax, dorsal. D. Abdomen, dorsal.

FIG. 15. Wings.

FIG. 22. Hirtodrosophila florida, n. sp., C, D female (diss. no. 75). A. Frons, portion. B. Antenna (dashed branch occurs in some individuals). C. Spermatheca. D. Oviscapt and oviprovector, lateral.

FIG. 23. Hirtodrosophila florida, n. sp., male terminalia (diss. no. 59). A. Epandrium and associated structures. B. Surstylus. C. Subepandrial sclerite, fully ventral view. D. Aedeagus and aedeagal apodeme, lateral. E. Hypandrium, aedeagus and aedeagal apodeme, ventral. F.Apex of aedeagus, ventral.