Cerodontha (Dizygomyza), 1920

Cerodontha (Dizygomyza) View in CoL n.sp. (near scirpioides Zlobin )

( Figs. 25–26 View FIGURES 25-26 )

Material examined. Costa Rica. Prov. Cartago. Paraíso, P.N. Tapantí, 1600m. 20-27 ENE 2013. Proyecto ZADBI . Malaise, ZADBI-505. -83:46:30 09:43:21 #106170. INB0004392883 (1M: MNCR).

Comments. This specimen from Tapantí was identified as C. (Diz.) scirpioides Zlobin in the list of species/ morphospecies in Borkent et al. (2018), a species previously described from high elevation (2,500 m) in western Mexico (near El Salto, Durango), but it is now considered a new species (formal description will be done elsewhere). The species differs from C. (Diz.) scirpioides (Zlobin 1997) by its smaller size (2.6 mm in male not 3.0 mm), fronto-orbital plate yellowish (not blackish); calypter and fringe brown (not yellowish-white), and slight differences in the phallus, including the shorter curvature at the base of the distiphallus and the small apical enlargement of the mesophallus (arrow, Fig. 26 View FIGURES 25-26 ). The study of the Cerodontha specimens from Tapantí, has brought my attention to previous specimens that were (temporarily) identified as C (D.) scirpioides in Boucher 2005. These specimens were from Cartago (1,400 m) ( Costa Rica) (1 male, LEMQ) (with the distiphallus much less dilated), and San Cristobal, Chiapas (7000’ = 2,133 m) ( Mexico) (1 female, CNC). But it is now becoming clearer that these specimens represent a new species. C. scirpioides from Durango ( Mexico) (Zlobin 1997), along with the specimens examined from Tapantí ( Costa Rica), Cartago ( Costa Rica), and Chiapas ( Mexico) have in common a reduced lower ors ( Fig. 25 View FIGURES 25-26 , arrow), a character rarely observed in Agromyzidae , but also observed in C. (Diz.) ZABDI-4 ( Table 1) and in C. (Diz.) impatientis Sasakawa. The latter species was collected from Parque National Henri Pittier, Rancho Grande, Venezuela (Sasakawa 1992d) but described from a female specimen only (and without any figures). Parque National Henri Pittier is home to a well-known cloud forest in South America (Sanchez & Liria 2009) and it is plausible that Cerodontha (Diz.) scirpioides , C. (Diz.) impatientis, the two species of Cerodontha (Dizygomyza) from ZADBI and the species (wrongly) identified as C. (Diz.) scirpioides in Boucher (2005) represent closely related species that are restricted to mid and high elevation Neotropical cloud forests.

Host plant. Unknown.

Distribution. Costa Rica.