Dixella woodi Chaverri and Borkent, 2007
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publication ID |
https://doi.org/ 10.11646/zootaxa.1575.1.1 |
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publication LSID |
lsid:zoobank.org:pub:6D448CFC-0B62-46C0-92BF-24629AE3FCE0 |
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persistent identifier |
https://treatment.plazi.org/id/03A187C6-FF90-FF91-4EF8-FAD6FB2BFC9A |
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treatment provided by |
Felipe |
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scientific name |
Dixella woodi Chaverri and Borkent |
| status |
sp. nov. |
Dixella woodi Chaverri and Borkent View in CoL n. sp.
( Figures 1H View FIGURE 1 , 3B View FIGURE 3 , 5B View FIGURE 5 , 6H View FIGURE 6 , 9A View FIGURE 9 , 13B View FIGURE 13 , 19A View FIGURE 19 )
Diagnosis. Male: only species of Dixidae in Central America with elongate, dark acrostichal and dorsocentral setae ( Figs. 3B View FIGURE 3 ; 5B View FIGURE 5 ). Also, only species in this region with setae on the katepisternum ( Fig. 5B View FIGURE 5 ) (but see Taxonomic Discussion below). Female: unknown.
Description. Male. Head ( Fig. 1H View FIGURE 1 ): brown, densely spiculate. Clypeus brown, 1.22 longer than basal width. Antennal scape brown, pedicel dark brown, flagellomeres light brown. Thorax ( Fig. 3B View FIGURE 3 , 5B View FIGURE 5 ): scutum with brown medial vittae extending from anterior margin to slightly beyond middle of scutum, divided longitudinally by yellow strip that continues posteriorly in prescutellar area as brown strip; lateral vitta extending from supraalar area to prescutal suture; acrostichal, dorsocentral setae elongate, dark; area near prescutal suture, antealar area with scattered setae; scutellum with setae along anterior margin. Scutellum, mediotergite light brown. Pleura with katepisternum, posterior anepisternum, anepimeron light brown, rest of pleura yellowish; scattered setae on upper katepisternum. Wing ( Fig. 6H View FIGURE 6 ; Table 1): without dark spot over r-m; R2+3 originating at or distal to r-m; stem of R2+3 0.30 length of R3. Halter: pale, 0.40 length of fore femur. Legs: yellowish; claws as figured ( Fig. 9A View FIGURE 9 ). Genitalia ( Fig. 13B View FIGURE 13 ): tergite 9 with anterior, posterior margins nearly straight, with numerous scattered setae. Sternite 9 with posterior margin lacking narrow excavation, with elongate scattered lateral, sublateral setae, bare medially. Gonocoxite wider than long; basal lobe not visible; apical lobe as long, as wide as gonostylus, truncate apically with anteromedial margin slightly projecting, with elongate basal seta, one elongate, two short subapical setae, a brown basal projection as a beak and a strong subbasal seta. Gonostylus with dense setae, somewhat swollen subapically, apex sharply tapered. Parameres, aedeagus not identified with certainty; anterior internal structures as figured. Tergite 10 broad, tapering gradully posteriorly, with minute and elongate spicules, posterior margin with two submedial setae.
Female and immatures. Unknown.
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Distribution and bionomics. This species is recorded from two localities in Costa Rica, at altitudes from 340–1360 m ( Fig. 19A View FIGURE 19 ) during the dry season (February). Habitats include Premontane Moist Forest and Tropical Lower Montane Forest. The paratype was swept with an aerial net along the margin of a narrow stream where pools had formed and were collected together with adults of D. venezuelensis .
Taxonomic discussion. A female collected at Costa Rica, Puntarenas, Puntarenas, Monteverde, 2 Km E. Santa Elena (1540 m, 2-VI-2000, J.M. Cumming, CD 5084; INBC) was initially thought to be the female of D. woodi because it had a thorax with a similarly distinctive setation (including on the katepisternum). However, the clypeus of this female was short, suggesting the presence of a second Costa Rican species with setae on the katepisternum (otherwise unique in this area). A second female we examined, from Colombia, Cundinamarca, Finca Bella Vista, near Sasaima (19-IV-1965, P.R. Craig; CAS), had katepisternal setae and a moderately elongate clypeus and may represent the female of D. woodi . However, the distance between the type locality and the site in Colombia makes us suspect that this female represents yet another undescribed species.
Types. Holotype, male adult on microscope slide, labeled “ HOLOTYPE Dixella woodi Chaverri and Borkent ”, “ Costa Rica, Prov. San José, Escazú, San Antonio, 4 Km E de Palmichal , Albergue Nacientes de Palmichal , 1360 m, 17-II-2004, LN 202650 516850, D.M. Wood ” ( INBC) . Paratype: male adult on microscope slide, Costa Rica, Prov. San José, Tarrazú, San Carlos, Reserva Riosparaíso , orilla del Río Blanco , 16 km NE de Quepos, 340 m, 15-17-II-2003, LN 172094 522815, A. Borkent, CD 5400" ( CNCI) .
Derivation of specific epithet. This species is named for D. Monty Wood in recognition of his important and continuing research on Neotropical Diptera and for his invaluable teaching, advice and contributions to developing an understanding of Diptera at the Instituto Nacional de Biodiversidad (INBio).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.