Enlinia bova, Runyon & Pollet, 2018

Runyon, Justin B. & Pollet, Marc, 2018, Enlinia Aldrich, 1933 of Mitaraka, French Guiana (Diptera: Dolichopodidae), Zoosystema 40 (19), pp. 453-468 : 457-459

Enlinia bova n. sp.

( Fig. 4 )

urn:lsid:zoobank.org:act:EAF56000-38E1-4F03-8C0A-0893A70F3843

TYPE MATERIAL. — Holotype. ♂, pinned. First label: “ GUYANE, Maripasoula, N 2°13’59.8” / W 54°27’46.5”, 471m, Malaise trap (6m), 13.viii.2015 - 20.viii.2015, P.-H. Dalens leg.” Second label: “partially open areas on savane roche 2; La Planète Revisitée Guyane 2015, MNHN PNI, sample cd: MITARAKA/230”. Third label: “HOLOTYPE ♂ Enlinia bova Runyon & Pollet 2018 ” (red label). Deposited at MNHN.

ETYMOLOGY. — The specific epithet is from the Latin bova = “swelling of the legs” in reference to the swollen front legs of the male ( Fig. 4C ).

DIAGNOSIS. — The shape of the male wing (as in Fig. 3 ) and the row of large, modified setae on the hind tibia ( Fig. 4B ) distinguish E. bova n. sp. from other known Enlinia species, except E. loboptera n. sp. These two species are closely related and males share many unique characteristics most notably the shape of the wing and the anterior row of distinct setae on hind tibia, but their differences are also marked. The large cerci bearing long apical setae that reach the base of the abdomen ( Fig. 4E ) and the very swollen front legs ( Fig. 4C ) easily distinguish E. bova n. sp.

DESCRIPTION

Male

Body size. Length. 1.5 mm, wing length 1.1 mm by 0.5 mm (width).

Head. Face and frons dark brown to black with very sparse brown pollen. Eyes essentially contiguous below antennae; anterior facets very enlarged; hairs between facets noticeably longer near mouth. Palpus not visible. Proboscis brown. Antenna ( Fig. 4A ) dark brown; first flagellomere about as long as wide, conical and rather sharply pointed apically; arista-like stylus apical, slightly longer than height of eye.

Thorax. Mesoscutum strongly arched with posterior slope distinctly flattened, dark brown to black with very sparse brown pollen and with weak dark green reflections; pleura dark brown to black, slightly lighter than scutum. Setae on dorsum short, brown with strong pale reflections; 9-10 pairs of small acrostichal setae; 10-11 pairs of dorsocentral setae, the posterior-most distinctly larger; one pair of widely separated scutellar setae and one pair of very small lateral hairs.

Legs. Brown with dark setae. Fore leg ( Fig. 4C ) enlarged and somewhat raptorial. Fore coxa enlarged, mostly bare except for a large, black seta on outer anterior surface at apex and a very small lateral hair just basal to large seta. Hind trochanter ( Fig. 4B ) with stout black ventrally-directed spine near 1/2 on anterior surface (length subequal to length of trochanter). Fore femur ( Fig. 4C ) greatly swollen, excavated anteroventrally at apex, with an erect ventral seta near base, one row of about 4-5 long, slender anterodorsal setae and a similar row of about 5 long, slender setae along posteroventral edge.Mid femur with stout ventral seta arising near base that is held close to ventral surface of femur and curved apically. Hind femur ( Fig. 4B ) with two rows of anteroventral setae on apical 2/3 (longest setae subequal to width of femur). Fore tibia ( Fig. 4C ) slightly thickened and distinctly shorter than fore femur, gradually widened toward apex and slightly dorsoventrally flattened, with one row of ventral setae nearly full-length, and a large apical seta at posteroventral corner. Mid tibia flattened dorsoventrally, bare dorsally; with ventral row of 10-12 stout setae along fulllength of tibia (as in E. loboptera n. sp. Fig. 1D ); fringed with long posteroventral setae along most of its length and a few long anteroventral setae on basal half and apical 2/3. Hind tibia ( Fig. 4B ) with anterior surface somewhat flattened on basal half, with a row of distinct anteroventral setae that are abruptly narrowed and slightly elbowed near or just beyond 1/2, these setae becoming smaller toward apex of tibia with apical-most seta slightly thickened and hook-like, with stout anteroventral seta at apex of tibia. Fore tarsus ( Fig. 4C ) extremely modified; tarsomere 1 ( Fig. 4D ) subquadrate, with 3 very large ventral setae one of which is hooked; tarsomere 2 slightly smaller than tarsomere 1 with finger-like posterior lobe near base and with dorsal setae near apex; tarsomere 3 expanded and rather thin, with large, darkened posterior lobe and with stout black dorsal seta and a “V”-shaped brown ventral seta near apex; tarsomere 4 nearly normal in shape, with large anterodorsal seta near apex. Mid tarsus with tarsomere 1 bearing short ventral setae that are hooked at apex; tarsomeres 2-4 with a slightly larger dorsal seta at apex. Hind tarsus ( Fig. 4B ) with tarsomere 1 short, slightly longer than wide and slightly flattened, with 3-4 setae along ventral edge and a couple setae dorsally at apex. Ratios of tibia:tarsomeres for fore leg (for highly modified tarsomeres, width given in parentheses): 12-4-4-6(8)-4-6; for mid leg: 15- 6-2-3-3-3; for hind leg: 25-4-9-6-4-3.

Wing. As in E. loboptera n. sp. ( Fig. 3 ) but vein R 2+3 not as sinuous. Halter dark brown.

Abdomen ( Fig. 4E ). Dark brown, slightly lighter in color than thorax; setae short and black. Sternite 4 with short median armature at hind margin that is rounded apically; tergite 6 about half width of sternite 5, and hidden beneath latter; sternite 6 wishbone-shaped. Hypopygium brown, relatively large; cerci brown, elongate and slender, ending in an oval disk with marginal setae along ventral edge and very long, stout black apical setae.

Female

Unknown, but likely similar to females of E. loboptera n. sp. and probably larger.

REMARKS

Enlinia bova n. sp. is one of the more ornate species of Enlinia and males have most body parts modified, sometimes exceptionally so (i.e., front legs and genitalia). This species is also perhaps the largest known in the genus thus far surpassing E. maxima which has a body size of 1.4 mm ( Robinson 1975).

Figures

FIG. 4. — Enlinia bova n. sp., ♂: A, antenna, lateral view; B, hind leg from tip of coxa, anterior view; C, fore leg, posterior view; D, tarsomere 1 of fore leg, ventral view (anterior is toward bottom of page); E, tip abdomen and terminalia, right lateral view. Abbreviations: cerc, cerci; S4, abdominal sternite 4. Scale bars: A, D, 0.1 mm; B, C, E, 0.5 mm.

FIG. 3. — Enlinia loboptera n. sp., ♂ wing. Scale bar: 0.5 mm.

FIG. 1. — Enlinia loboptera n. sp., ♂: A, fore tibia and tarsus, dorsal view; B, apex of fore tibia and tarsomere 1, ventral view; C, mid tibia and tarsomere 1, dorsal view; D, apex of mid femur, tibia, and tarsomere 1, anterior view; E, tip of abdomen and terminalia, left lateral view. Abbreviations: cerc, cerci; S4, abdominal sternite 4. Scale bars: A, C-E, 0.5 mm; B, 0.1 mm.