Myocoris Burmeister, 1835

Gil-Santana, Helcio R. & Oliveira, Jader, 2023, A new genus and a new species of wasp-mimicking Harpactorini (Hemiptera, Heteroptera, Reduviidae, Harpactorinae), with an updated key to the Neotropical genera, ZooKeys 1152, pp. 163-204 : 163

Myocoris Burmeister, 1835

Myocoris Burmeister, 1835: 221 [key], 226 [description], 1838: 104 [diagnostic characteristics]; Stål 1859: 367 [key], 370 [diagnostic characteristics], 1866: 294 [key], 1872: 69 [key], 83 [catalog]; Walker 1873a: 49 [key], 63 [key], 1873b: 128 [catalog]; Lethierry and Severin 1896: 178 [catalog]; Wygodzinsky 1949: 42 [catalog]; Putshkov and Putshkov 1985: 52 [catalog]; Maldonado 1990: 236 [catalog]; Maldonado and Lozada 1992: 165 [key]; Forero 2011: 15 [checklist]; Gil-Santana 2015: 36 [key], 2016: 92 [citation]; Gil-Santana et al. 2017: 41 [citation]. Type species: Myocoris nigriceps Burmeister, 1835: 226, by subsequent designation, Wygodzinsky 1949: 42.

Cosmonyttus Stål 1866: 295 [key, in part, including M. nigriceps ]; synonym proposed by Kirkaldy 1909: 388. Type species: Myocoris nigriceps Burmeister, 1835: 226, by monotypy.

Morphological remarks.

Head cylindrical, elongated, with sparse thin setae on ventral and anteocular portions; postantennal spines short, curved forward, apices acute or somewhat rounded. Legs: fore femora thickened, narrowing at apices and somewhat curved at basal half; fore tibia curved at apical third; middle and hind legs elongated, slender; hind femora curved approximately at basal half.

Burmeister (1835) described Myocoris and two new species included in this genus: M. nigriceps and M. braconiformis . In his subsequent paper, "Some account of the Genus Myocoris …” ( Burmeister 1838), he considered ten species as included in the genus, some of which were described as new in this occasion, such as M. tipuliformis . While several of these ten species were transferred to other genera or considered as synonyms of other species ( Maldonado 1990), Stål (1872) described M. nugax and maintained only two other species included in Myocoris : M. nigriceps and M. tipuliformis . With exception of Walker (1873b), who considered 26 species as belonging to Myocoris , all other subsequent authors ( Lethierry and Severin 1896; Wygodzinsky 1949; Putshkov and Putshkov 1985; Maldonado 1990) followed Stål (1872). The three species currently included in Myocoris were described from Brazil and accordingly with Stål (1872) may be separated by the following key:

1	Humeral angles acutely spined (Figs 5 , 13 )	2
-	Humeral angles not acute, rounded (Fig. 9 )	M. nugax Stål, 1872
2	Only the basal portion of the first visible labial segment blackish (Fig. 3 )	M. nigriceps Burmeister, 1835
-	First visible labial segment entirely blackish (Fig. 14 )	M. tipuliformis Burmeister, 1838

Stål (1872) stated that M. nigriceps and M. tipuliformis were very related and similar species, while M. nugax although similar to M. tipuliformis , differed from the latter by the somewhat shorter neck, shorter postantennal spines, and humeral angle without acute prominence. Another difference in coloration between M. nigriceps and M. tipuliformis is in their legs. In M. tipuliformis the apical portion of the femora and basal portion of tibiae are blackish, while in M. nigriceps these portions are pale.

Figures

Figures 1 - 8. Myocoris nigriceps Burmeister, 1835, syntypes deposited in MFNB 1 - 4 sex not determined, catalog number MfN URI http: // coll. mfn-berlin. de / u / 915662 1 dorsal view 2 ventral view 3 lateral view 4 labels 5 - 8 female, catalog number MfN URI http: // coll. mfn-berlin. de / u / bc 0135 5 dorsal view 6 lateral view 7 head, anterior view 8 labels. The copyright of these images is property of the MFNB. Scale bars: 5.0 mm (1 - 3, 5, 6); 1.0 mm (7).

Figures 13 - 16. Myocoris tipuliformis Burmeister, 1838, male syntype deposited in MFNB, catalog number MfN URI http: // coll. mfn-berlin. de / u / f 1 f 08 c 13 dorsal view 14 lateral view 15 head, anterior view 16 labels. The copyright of these images is property of the MFNB. Scale bars: 5.0 mm (13, 14); 1.0 mm (15).

Figures 9 - 12. Myocoris nugax Stal, 1872, syntype, sex not determined, deposited in NHRS, catalog number NHRS-GULI 000000052, photographs provided by Gunvi Lindberg, 2022 Naturhistoriska riksmuseet. Made available by the Swedish Museum of Natural History under Creative Commons Attribution 4.0 International Public License, CC-BY 4.0, https: // creativecommons. org / licenses / by / 4.0 / legalcode 9 dorsal view 10 ventral view 11 lateral view 12 labels.