Derecyrta risaraldensis Malagón-Aldana, 2019

Malagón-Aldana, Leonardo A., Smith, David R., Vilhelmsen, Lars & Serna, Francisco, 2019, The sawflies and woodwasps (Hymenoptera: ‘ Symphyta’) of Colombia, Zootaxa 4633 (1), pp. 1-88 : 74-76

Derecyrta risaraldensis Malagón-Aldana sp. nov. ( Fig. 28 a–h)

LSID: urn:lsid:zoobank.org:act:CEB3ABAE-A4E7-4004-A8BC-86381487244C

Female: Body length 16.6 mm. Antenna with 22 antennomeres, antenna length 2.2 × head width; scape 1.6 × as long as than pedicel; scape length 3 × its width; pedicel length 2.5 × its width; 1 st flagellomere 1.3 × as long as the 2 nd flagellomere; antennae gradually tapering distally. In frontal view, lower interocular space 1.4 × eye length; face slightly rough, without reticulations ( Fig. 28d,c ); vertex and temple smooth and polished ( Fig. 28b,e ); paired high frontal carinae run between the median ocellus and the anterior tentorial pits; circular frontal fovea present; epistomal suture absent; clypeus fused with frons, forming frontoclypeus ( Fig. 28d ); lower margin of frontoclypeus with a short mesial triangular projection; occipital carina present, postgenal carina absent; space between lateral ocelli 0.6 × distance between eye and lateral ocellus, and 0.2 × distance between lateral ocelli and posterior margin of head; malar space long, 2 × diameter of median ocellus; mandibles subquadrate ( Fig. 28d ), with 3 uniform teeth; maxillary palpus with 6 palpomeres; labial palpus with 4 palpomeres, apical palpomere 2 × length of preapical. Pronotum with short reticulations on lateral ends of transpronotal sulcus. Meso- and metathorax slightly rough, with parallel reticulations on following: posterior area to notauli and anterior to median region of transcutal sulcus, interaxillar sulcus, anterior margin of lateral mesoscutellum, lateral arms of metascutellum, and posterior margin of mesepimeron. Mesoscutellum posterior margin with short mesodorsad spiniform projection ( Fig. 28a ). Cenchri narrow and semicircular. Mesopleuron with horizontal pleural suture obliterated posteroventrally. Fore wing ( Fig. 28f ) with crossvein 2r-rs absent; intercostal crossvein Sc1 distad to Rs; section of vein M from M+Cu1 shorter (0.5 ×) than section of vein Rs section from Sc+R; 1m-cu curved out distally; crossvein 2r-m length 0.5 × of 3r-m length ( Fig. 28f ). Calcar of protibiae curved, tapering distally, with two triangular apical teeth and short velum on inner ventral margin ( Fig. 28c ). Metafemur 4 × as long as its width. Claws strongly curved apically, with inner tooth shorter than outer ( Fig. 28g,h ). Metabasitarsus length 0.4 × of entire metatarsus. Tarsal plantulae lobes absent. Tibial preapical spurs absent. Subquadrate plates of abdominal tergum I (T1) rough with mesial margin smooth; abdominal segments II, VIII and IX twice as long as remaining segments ( Fig. 28b ); urotergum X (T10) subquadrate, much smaller than all anterior abdominal terga. Cerci long, 4 × as long as its width, rounded apically, in dorsal view slightly longer than urotergum X. Third valvulae in lateral view same length as tergum I. Pilosity white, covering frons, malar space, base of mandibles, propleura, pronotum, mesopleura and abdominal tergum IX.

Color: Body mostly black, with many creamy white spots. Head mainly black, with a white trapezoid spot on frontoclypeus, and a couple of wide white bands along dorsomesial margin of eyes, extending to vertex, ventrally covering malar space, expanding posteriorly to temple ( Fig. 28d,e ). Antenna mainly black, with antennomeres 13- 20 white ( Fig. 28b ). Pronotum mainly white, with dorsal and posterior margins of lateral lobes white; propleura black; mesonotum mainly black, with posterior half of median lobe of mesoscutum, dorsal region of axillae and mesoscutellum white; mesoscutellum with small black spot apically; metanotum black with metascutellum white, and pair of white spots posterior to each cenchrus. Mesopleuron black with superior half of episternum white; metapleuron black ( Fig. 28a,b ). Legs mostly black, with dorsal region of coxae, ventral region of femora and tibiae white (apex of tibiae black). Wings hyaline with veins brown. Abdomen mainly black, with mesal margin of tergum I and transverse band on the middle of tergum II to VIII white ( Fig. 28a,b ); tergum IX mainly black, with pair of lateral large white C-shaped bands surrounding the posteroventral margin; tergum × white. Abdominal sterna dark brown with yellow median spot on each. Cerci black. 2 nd valvifers and 3 th valvulae (ovipositor sheath) black.

Male: Unknown.

Etymology: Named for Risaralda department, Colombia.

Holotype: ♀. COLOMBIA. Risaralda, Mistrato. Cto. San Antonio del Chamí. 900m alt. 5°17’N, 75°52’10”W. 01-Abr-1992. F. Fernández. Deposited in ICN-MHN, 095923.

Remarks: Derecyrta risaraldensis , D. circularis and D. beechei each have different combinations of yellow spots on a black background. D. circularis ( Fig. 28j ) has the entire antenna black, narrow subocular stripe bands not extending dorsally beyond the antenna, thorax mostly black with a small spot in the dorsal corner of mesepisternum, and legs entirely black. In D. beechei ( Fig. 28i ) the antenna is brown, with 27 antennomeres; malar space black; thorax black with mesoscutellum yellow. In addition, beechei is exceptional in having the crossvein 2r-rs and tarsal plantulae, which are absent in the remaining species ( Smith 1995b).

Figures

FIGURE 28. Derecyrta; a-g. Derecyrta risaraldensis sp. nov. ♀ (ICN-MHN ICN_095923); a. Habitus, lateral view, b. Habitus, dorsal view; c. Calcar; d. Head, frontal view; e. Head, lateral view; f. Fore wing; g. pretarsal claws; h. Distal metatarsus; i. D. beechei ♀ (SDEI, photograph by Taeger 2013) habitus, lateral view, j. D. circularis habitus ♀ (NMNH), lateral view. Abbrevia- tion of main veins in blue, cross veins in green, wing cells in red.A, Anal veins; a-a, anal crossvein; AP, proximal anal cell; AD, distal anal cell; C, costa; Cu, cubitus; M, media; r-m, radial-median crossvein; m-cu, mediocubital crossvein; R, radius; r-rs, radial crossvein; Rs, radial sector; Sc, Subcosta.