Dohrniphora sexspinosa, Kung & Brown, 2006

Kung, Giar-Ann & Brown, Brian V., 2006, Review of the Caribbean species of Dohrniphora Dahl (Diptera: Phoridae), Journal of Natural History 40 (32 - 34), pp. 1931-1945 : 1941-1944

Dohrniphora sexspinosa new species

( Figures 17, 18 , 31, 32 )

Diagnosis

Dohrniphora sexspinosa is easily distinguished from other Dohrniphora species by its six scutellar setae, and close group of six ventrobasal peg-like setae. D. sexspinosa keys to D. scutellaris in Borgmeier’s 1960 key because of the presence of six scutellar setae, but the arrangement and number of the ventrobasal peg-like setae on the hind femur differs. (See Diagnosis section of D. seriata .)

Description

Male. Mean body length 2.44 mm; range 2.12–2.72 mm. Mean frontal ratio 0.50; range 0.48–0.51. Frons and flagellomere 1 orange to brown. Ventral fronto-orbital setae at approximately same level as ventral interfrontal setae. Palpus yellow, with four or five apical setae. Scutum and scutellum light brown. Scutellum with three pairs of scutellar setae. Middle pair approximately 2.5 times length and thickness of other pairs. Anterior and posterior pairs about equal in size. Pleuron yellow. Mean wing length 2.22 mm; range 2.00– 2.41 mm. Mean costal length 0.52 wing length; range 0.49–0.53. Mean costal sector ratio 8.54:3.11:1.00; range 7.67–10.75:2.67–3.75:1.00. Halter white. Legs mostly yellow, except apex of hind femur dark brown, almost black, on anterior and posterior faces. Postcoxal lobes present; yellow, rounded. Posterior face of hind femur ( Figures 17, 18 ) with a group of six peg-like setae at base of ventral margin, basal tooth, and apical tooth, dorsoapical to the group of setae (teeth difficult to see under light microscopy). Hind tibia without isolated setae. Abdominal tergites dark brown, with or without thin yellow line medially. Venter of abdomen yellow. Mean cercus length 0.29 mm; range 0.23–33 mm ( Figures 31, 32 ).

Distribution

Dominican Republic.

Etymology

Combination of the Latin words sex and spinosus, referring to the six setae on the posterior face of the hind femur.

Holotype: „. Dominican Republic: Pedernales, 23.5 km N Cabo Rojo , 18.10 ° N, 71.63 ° W, 19–21 July 1990, L. Masner, J. Rawlins, C. Young, intercept trap, deciduous forest, 540 m ( CMNH) [barcode: LACM ENT 219718 ] . Paratypes: Dominican Republic: Pedernales, 23.5 km N Cabo Rojo , 18.10 ° N, 71.63 ° W, 2 „, 13–19 July 1990, 1 „, 13–25 July 1990, 6 „, 19–21 July 1990, 4 „, 19–25 July 1990, L. Masner, J. Rawlins, C. Young, intercept trap, deciduous forest, 540 m ( CMNH, LACM) .

Key to males of Caribbean Dohrniphora

1. Scutellum with four setae................. 2

– Scutellum with six setae................. 4

2. Posterior face of hind femur with sparse dorsal setae; ventrobasal region with only four or five short, thick peg-like setae ( Figures 1, 2 ).... D. cornuta (Bigot)

– Posterior face of hind femur without dorsal setae; ventrobasal region with many (more than 20) long, thick peg-like setae............ 3

3. Flagellomere 1 orange, enlarged ( Figures 21, 22 ); fore tarsomere 5 dark, broad ( Figure 19 ); posterior face of hind femur with dark, circular ventral carina apical to ventral setae ( Figures 3, 4 ).......... D. dispar (Enderlein)

– Flagellomere 1 brown, not enlarged; fore tarsomere 5 same colour as rest of leg, not broad ( Figure 20 ); posterior face of hind femur without carina, but with shallow ventral depression apical to ventral setae ( Figures 5–12 )....................... D. divaricata (Aldrich)

4. Posterior face of hind femur with relatively straight ventrobasal row of four or five setae ( Figures 13–16 ); postcoxal lobes not developed... D. seriata new species

– Posterior face of hind femur with six setae grouped together, not in a row ( Figures 17, 18 ); postcoxal lobes present..... D. sexspinosa new species

Figures

Figures 13–18. Posterior face of hind femur. (13, 14) Dohrniphora seriata [LACM ENT 184595]. (15, 16) D. seriata [LACM ENT 210889]. (17, 18) D. sexspinosa [LACM ENT 179771].

Figures 23–32. Male genitalia, right and left lateral views. (23, 24) Dohrniphora cornuta. (25, 26) D. dispar. (27, 28) D. divaricata. (29, 30) D. seriata. (31, 32) D. sexspinosa.

Figures 1–4. Posterior face of hind femur. (1, 2) Dohrniphora cornuta [LACM ENT 186301]. (3, 4) D. dispar [LACM ENT 219829].

Figures 21, 22. Dohrniphora dispar, head. (21) Front view. (22) Lateral view.

Figures 19, 20. Fore tarsomere 5. (19) Dohrniphora dispar [LACM ENT 219743]. (20) D. divaricata [CMNH 381,632].

Figures 5–8. Posterior face of hind femur, variation in Dohrniphora divaricata. (5, 6) Paratype, Saint Vincent [LACM ENT 210546]. (7, 8) Dominica [LACM ENT 210539].

Figures 9–12. Posterior face of hind femur, variation in Dohrniphora divaricata. (9, 10) Saint Kitts [LACM ENT 210487]. (11, 12) Puerto Rico [LACM ENT 210822].