Published October 9, 2024 | Version v1

Achradocera femoralis Becker 1922

  • 1. Universidade de São Paulo, Instituto de Biociências, Programa de Pós-Graduação em Zoologia. Rua do Matão, travessa 14, nº. 101, Cep: 05508 - 090, Cidade Universitária, São Paulo, SP, Brazil
  • 2. Instituto Federal de São Paulo. Campus Avaré. Av. Prof. Celso Ferreira da Silva, 1333 Jardim Europa II, 18707 - 150, Avaré, SP, Brazil
  • 3. Universidade de São Paulo, Museu de Zoologia. Av. Nazaré, 481, 04263 - 000, Ipiranga, São Paulo, SP, Brazil

Description

Achradocera femoralis Becker, 1922

(Figs 13, 14, 26)

Achradocera femoralis Becker, 1922: 208.

Type-locality: Colombia, Barranquilla. Lectotype male, MfN [see Remarks section].

Diagnosis (male). Postpedicel longer than arista-like stylus; lower postoccipital setae dense. Legs mostly yellow, except for FIII, dorsal surface of FI, and distal tarsi, which are all brown infuscated; leg I simple; TII bulged ventrally in the middle, with two ventral rows of setae along the swelling, then constricted from apical 1/3 to the apex, forming excavation; IIt 1 arched, with ring of setae at basal 1/3 and anteroventral tubercule within ring; FIII bulged on basal half and concave below, bearing cluster of strong, long setae near middle of anterior surface; IIIt 3–4 concave ventrally. Hypopygium small; surstylus subtriangular, tapered and bearing 1 apical and 1 strong subapical seta; postgonite enlarged and covered by small setae.

Redescription. Similar to A. angustifacies stat. rev., except as noted. Male. Body length: 2.68 mm. Wing: 2.24 mm long, 0.78 mm wide. Antenna. Postpedicel longer than arista-like stylus; FAr ratio, 1.35. Thorax. Bearing 10 ac and 5 dc pairs of setae. Wing. Lower calypter yellow with fan of about 6–7 brownish setae; CuAx ratio, 0.45; RMx ratio, 1.43. Leg I. 40, 35, 15, 7, 5, 4, 4. F bearing posterior row of about 4 setae at apical 1/4 apical; T with distinct apicoventral seta. Leg II. 45, 50, 23, 14, 6, 5, 4. F yellow, with anterior and posterior row of about 5 setae at apical 1/4; T bearing anterior seta on basal 1/4, and 4 setae apically (1 av, 1 pv, 1 ad and 1 pd); T (Fig. 13E) bulged ventrally in middle, with two ventral rows of setae along swelling, constricted at apical 1/3 to apex, forming excavation; t 1 (Fig. 13E) arched with small av tubercule on basal 1/5 with some spines apically, carrying ventral and posterior row of strong decreasing setae, with ad row making circlet of conspicuous setae. Leg III. 32, 35, 10, 6, 4, 3, 3. F with anterior and posterior row of about 3 setae at apical 1/5; bulged on basal half and concave below, bearing cluster of strong anterior setae near middle; T bearing 3 pd, 2 ad, and 3 apical setae (1 av, 1 ad and 1 pd); T yellow; IIIt 3–4 concave ventrally. Hypopygium. As in Fig. 14A–D, similar to that of A. angustifacies stat. rev.

Female. Unknown.

Distribution. Colombia and Curaçao (Fig. 26).

Type material examined. LECTOTYPE [here designated] ♂, labelled: “ Columbia | Ujhelyi”, “ Baranquilla | 1912.III.”, “ Achradocera | Beck.” [handwritten], “ femoralis | Beck.” [handwritten], “Typus”, “ MFN URI | http:// coll.mfn- | berlin.de/u/ | 09c83f” [MfN, based on photo].

Additional material examined. Curaçao. 1♂, “ CURAÇAO | Savonet | 12 February 1987 | W. E. Steiner & | J. M. Swearingen ” [SMNS].

Remarks. According to Becker (1922), the types of A. femoralis were collected from Paraguay, Trinidad and Colombia and were housed at the Hungarian Natural History Museum (HNHM, Budapest), whose collection was set on fire during a bombing in the 1956 Hungarian Revolution (Evenhuis 2006) and, as such, the types should be considered as lost. Nevertheless, a male specimen of Achradocera from Colombia, labeled as “typus” and with Becker’s handwritten label “ femoralis ”, was later found in the MfN holdings in Berlin. This male type in Berlin clearly does not fit Becker’s (1922) original description (stated as having unmodified legs), as the specimen has modified TI, FII, IIt 1, FIII and IIIt 3–4. It is not unexpected that specimens from distant localities such as Paraguay, Trinidad and Colombia were not conspecific. We assume that Becker probably overlooked salient differences among the specimens of his type series, as he did before with Chrysotus pictipes Becker (see Capellari & Almeida (2024)) and, in similar way, regarded as conspecific specimens from distant localities, such as Paraguay and Argentina with New York, U.S.A. (for Condylostylus erectus, see Bickel (2003)) and Paraguay with Georgia, U.S.A. (for Mesorhaga jucunda, see Bickel (2007)). Even though the remaining type does not fit Becker’s original description, it still is the name-bearer specimen of A. femoralis and we are herein designating it as the lectotype to ensure proper identification of the species.

It is worth mentioning that Becker’s original concept for this species (based on the 1922 description) was the same used by Robinson (1970) for a subsequent designation of a type-species for the genus. We see no need to shift the type species of the genus, despite the change in concept of A. femoralis (which was maintained as the type-species of Achradocera). A concept similar to Becker’s A. femoralis is applied below to describe the new species A. gimli sp. nov. and the species may correspond to Becker’s specimens from Paraguay and Trinidad (HNHM, destroyed).

Notes

Published as part of Quevedo, Lucas, Capellari, Renato S. & Lamas, Carlos José E., 2024, Taxonomic revision of Achradocera Becker (Diptera: Dolichopodidae), with description of two new species, pp. 301-344 in Zootaxa 5519 (3) on pages 323-326, DOI: 10.11646/zootaxa.5519.3.1, http://zenodo.org/record/13915949

Files

Files (5.7 kB)

Name Size Download all
md5:85ec2967ae36a28684185045e42814af
5.7 kB Download

System files (29.2 kB)

Name Size Download all
md5:15b5b4ae8c61f28942cce78bff06ba5d
29.2 kB Download

Linked records

Additional details

Biodiversity

Collection code
MFN , SMNS
Event date
1987-02-12
Verbatim event date
1987-02-12
Scientific name authorship
Becker
Kingdom
Animalia
Phylum
Arthropoda
Order
Diptera
Family
Dolichopodidae
Genus
Achradocera
Species
femoralis
Taxon rank
species
Type status
lectotype
Taxonomic concept label
Achradocera femoralis Becker, 1922 sec. Quevedo, Capellari & Lamas, 2024

References

  • Becker, T. (1922) Dipterologische Studien. Dolichopodidae. B. Nearktische und neotropische Region. Abhandlungen der Zoologisch-Botanischen Gesellschaft in Wien, 13 (1), 1 - 394. https: // doi. org / 10.5962 / bhl. title. 132893
  • Evenhuis, N. L. (2006) Catalog of the Keroplatidae of the World. Bishop Museum Bulletins in Entomology 13, 1 - 178.
  • Capellari, R. S. & Almeida, K. F. (2024) On the identity of three species of Chrysotus Meigen (Diptera: Dolichopodidae) described from Brazil by Millard C. Van Duzee. Journal of Insect Biodiversity, 45 (1), 18 - 27. https: // doi. org / 10.12976 / jib / 2024.45.1.3
  • Bickel, D. J. (2003) New synonyms in the Nearctic and Neotropical Sciapodinae (Diptera: Dolichopodidae). Studia dipterologica, 9, 545 - 560.
  • Bickel, D. J. (2007) The Mesoamerican Mesorhaga (Diptera: Dolichopodidae), with a taxonomic conspectus of the New World fauna. Zootaxa, 1411 (1), 47 - 67. https: // doi. org / 10.11646 / zootaxa. 1411.1.5
  • Robinson, H. (1970) 40. Family Dolichopodidae. In: A catalogue of the Diptera of the Americas South of United States. Departamento de Zoologia, Sap Paulo, pp. 40.1 - 40.92.