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

publication ID 10.11646/zootaxa.4633.1.1

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Derecyrta risaraldensis Malagón-Aldana

sp. nov.

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


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 View FIGURE 28 ); vertex and temple smooth and polished ( Fig. 28b,e View FIGURE 28 ); 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 View FIGURE 28 ); 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 View FIGURE 28 ), 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 View FIGURE 28 ). Cenchri narrow and semicircular. Mesopleuron with horizontal pleural suture obliterated posteroventrally. Fore wing ( Fig. 28f View FIGURE 28 ) 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 View FIGURE 28 ). Calcar of protibiae curved, tapering distally, with two triangular apical teeth and short velum on inner ventral margin ( Fig. 28c View FIGURE 28 ). Metafemur 4 × as long as its width. Claws strongly curved apically, with inner tooth shorter than outer ( Fig. 28g,h View FIGURE 28 ). 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 View FIGURE 28 ); 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 View FIGURE 28 ). Antenna mainly black, with antennomeres 13- 20 white ( Fig. 28b View FIGURE 28 ). 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 View FIGURE 28 ). 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 View FIGURE 28 ); 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. GoogleMaps

Remarks: Derecyrta risaraldensis , D. circularis and D. beechei each have different combinations of yellow spots on a black background. D. circularis ( Fig. 28j View FIGURE 28 ) 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 View FIGURE 28 ) 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).













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