Dixella shannoni (Lane)

Huerta, Heron & Ibáñez-Bernal, Sergio, 2021, A new species of Dixella, the first Mexican record of Dixella shannoni, and a summary of dixid records from Mexico (Diptera: Dixidae), Zootaxa 5016 (3), pp. 430-440: 438

publication ID

https://doi.org/10.11646/zootaxa.5016.3.8

publication LSID

lsid:zoobank.org:pub:C129938C-C9AA-4874-8DEF-CA8191D02A5C

persistent identifier

http://treatment.plazi.org/id/03A4827A-9D19-FFB0-3E97-58D1FD57F817

treatment provided by

Plazi

scientific name

Dixella shannoni (Lane)
status

 

Dixella shannoni (Lane)  

( Figs. 3C View FIGURE 3 , 8 View FIGURE 8 , 9 View FIGURE 9 )

Dixa (Dixella) shannoni Lane, 1942: 88   . (male; figs.; Costa Rica). Type-locality: San Mateo, Higuito, Costa Rica. Holotype male (USNM). Lane, 1953: 51 (male; description; distribution; figs.; Costa Rica).

Dixella shannoni (Lane)   : Stone, 1966: 10.2 (Catalogue of Diptera   of the Americas south of US); Chaverri & Borkent, 2007: 11 (male, female; diagnosis; redescription; distribution; bionomics; figs.; Costa Rica); Greewalt & Moulton, 2016: 31 (morphological data matrix).

Remarks. This species was previously known only from Costa Rica ( Lane, 1942, 1953; Chaverri & Borkent, 2007). We examined two males from Oaxaca, collected in the vicinity of Yaveo ( Fig. 9 View FIGURE 9 ). Based on the descriptions provided by Lane and Chaverri & Borkent, our specimens are conspecific. Dixella shannoni   is distinguished from other species of the genus by the following combination of characteristics: 1) a wide pale medial band on the pleura extending from the anterior margin of the katepisternum to the posterior margin of the anepimeron ( Fig. 8A View FIGURE 8 ); 2) R 2+3 originating distal to r-m ( Fig. 3C View FIGURE 3 ); 3) and 4) aedeagus triangular anteriorly (in Fig. 8B View FIGURE 8 , it seems short and rounded because the position of terminalia after the permanent slide was made), aedeagal apodemes long with apical portion hook shaped (labeled as parameres in Fig. 11A of Chaverri & Borkent (2007)), parameres blade like ( Fig. 8B View FIGURE 8 ). Our specimens from Mexico agrees with the general body description and structures of the male genitalia, differing only by the scutum being darker. This species was collected at altitudes of 180–700 m in Costa Rica ( Chaverri & Borkent, 2007), and in Mexico was collected at an altitude of 440 m.

New records for Mexico. Oaxaca, Santiago Yaveo ( Fig. 9 View FIGURE 9 ), trap CDC, GPS: 17° 20’ 8.5” N, 95° 41’ 38” W; 20 Nov. 2019 GoogleMaps   , coll. entomological brigade, 2 males (slides, in CAIM)   .

Distribution. Mexico (Oaxaca), Costa Rica.

CDC

Changdu Institute for Drug Control

CAIM

Collection of Aquatic Important Microorganisms

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Dixidae

Genus

Dixella

Loc

Dixella shannoni (Lane)

Huerta, Heron & Ibáñez-Bernal, Sergio 2021
2021
Loc

Dixa (Dixella) shannoni

Lane, J. 1953: 51
Lane, J. 1942: 88
1942