Hirtodrosophila florida Grimaldi, 2018, new species
Creators: name: Grimaldi, David A.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Hirtodrosophila
Hirtodrosophila florida

description: 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.
description: Published as part of Grimaldi, David A., 2018, Hirtodrosophila Of North America (Diptera: Drosophilidae), pp. 1 in Bulletin of the American Museum of Natural History 2018 (421) on page 1, DOI: 10.1206/0003-0090-421.1.1, http://zenodo.org/record/10687866