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 View 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.