Calyxochaetus lamellicornis Parent

Runyon, Justin B., 2024, Revision of the genus Calyxochaetus Bigot (Diptera: Dolichopodidae: Sympycninae), Zootaxa 5539 (1), pp. 1-74 : 60

publication ID

https://doi.org/ 10.11646/zootaxa.5539.1.1

publication LSID

lsid:zoobank.org:pub:7BDB9666-CA90-40BF-8F65-B9897CDA1F2B

DOI

https://doi.org/10.5281/zenodo.14240404

persistent identifier

https://treatment.plazi.org/id/FD1A87BF-A517-FFDE-50D3-FC59FE67F826

treatment provided by

Plazi

scientific name

Calyxochaetus lamellicornis Parent
status

 

Calyxochaetus lamellicornis Parent View in CoL

( Figs 114 View FIGURES 104–119 , 147 View FIGURES 147–148 )

Calyxochaetus lamellicornis Parent, 1930: 105 View in CoL .

Type material examined. HOLOTYPE ♂, labeled: “MUSEUM PARIS/ MEXIQUE / ÉTAT DE JALISCO / ENVIRONS DE GUADALAJARA / L. DIGUET 1914”; “NOVEMBRE”; “TYPE [red label]”; “MNHN, Paris/ ED11408” ( MNHN) [photos examined].

Diagnosis. This Mexican species is distinguished from others in the frontalis species group by the weakly modified mid tarsus ( Parent 1930, fig. 28; similar to Fig. 129 View FIGURES 120–131 ) and arista-like stylus with elongate, narrowly oval apical lamella that is obliquely clipped at apex ( Fig. 114 View FIGURES 104–119 ).

Redescription (adapted from Parent 1930). Male. Body length 3 mm. Head: Frons shiny metallic violet. Face narrow, satiny white. Antenna ( Fig. 114 View FIGURES 104–119 ) black; scape slightly shorter than postpedicel; postpedicel elongate oval, about 1.5X as long as wide; arista-like stylus with elongate, narrowly oval apical lamella, obliquely clipped across apex. Thorax: Metepimeron yellow. Scutellum with distinct blue-violet reflections. Legs: Foreleg: Yellow, tarsus dark brown from near apex of tarsomere 2. Tibia slender. Tarsomere 1 very short, about as long as wide. Tarsomere 3 subequal in length to tarsomere 4, with longer dorsal microsetulae at apex. Tarsomere 4 with longer dorsal microsetulae (some hooked) and row of slightly larger microsetulae across apex. Midleg: Yellow, except tarsomeres 2–5 black. Tarsus weakly modified ( Parent 1930, fig. 28). Tarsomere 1 slightly longer than combined length of tarsomeres 2–5. Tarsomere 2 scarcely broadened apically, with small anteroapical projection bearing a few longer microsetulae. Tarsomeres 3–4 short, similar in size. Hindleg: Yellow, except tarsus black. Tarsomere 1 slightly but distinctly shorter than tarsomere 2. Wing: Tinged with brown; veins brown. Elongate oval and rather narrow, with anal area somewhat reduced. Abdomen: Tergites 2–3 mostly yellow except narrow median brown band. Tergite 4 with large yellow lateral spot.

Female. Unknown.

Distribution and seasonal occurrence. Known only from the type specimen from near Guadalajara, Mexico ( Fig. 147 View FIGURES 147–148 ) collected in November.

Remarks. Parent (1930) provided illustrations of the antenna, fore and mid tarsi, and wing. This species seems related to C. frontalis (whose males have an unmodified arista-like stylus) based on the similar, weakly modified mid tarsus. Although Parent (1930) did not note specialized ventral setae on the hind tibia of C. lamellicornis (and the hind tibia are now broken on the type), I suspect such setae could be present and this species will run both ways in the key (couplet 27).

MNHN

France, Paris, Museum National d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Dolichopodidae

SubFamily

Sympycninae

Genus

Calyxochaetus

Loc

Calyxochaetus lamellicornis Parent

Runyon, Justin B. 2024
2024
Loc

Calyxochaetus lamellicornis

Parent, O. 1930: 105
1930
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF