Sundarellus orinoquensis Serna-Munoz 2024, new species
Creators: name: Serna-Muñoz, Sebastian
name: Wolff, Marta
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Coreidae
Sundarellus
Sundarellus orinoquensis

description: Sundarellus orinoquensis Serna-Muñoz new species   
http://zoobank.org/ urn:lsid:zoobank.org:act: 967F9449-6C0A-4581-9A14-ABFB7E40E33A  
(Figs. 232, 342–347)  
 Type material. Holotype male: COLOMBIA. Guaviare: VII–1989, A. Rodríguez, UNAB 6654. Paratype: COLOMBIA. Meta: La Macarena, 28–III–1997, A. Rodríguez, ♀, UNAB 6654.   
 Description. Holotype male: Dorsal coloration. Head bright orange; antennal segment I reddish brown with orange basal junction, II reddish brown, III and IV lacking; pronotal disc bright orange; scutellum black; clavus bright orange-yellow with black inner margin; corium bicolor, black with bright orange-yellow inner, costal, and apical margins; hemelytral membrane black at base and dark brown towards apex; connexival segment II bright orange with black posterior half, III-V black, VI bright orange with black basal margin, VII black with orange basal margin and posterior third (Fig. 342). Ventral coloration. Head and rostral segments I-II bright orange, rostral segment IV reddish brown; pro, meso, and metasternum bright orange; pro, meso, and metapleuron bright orange; anterior and posterior lobes of metathoracic peritreme orange; coxae orange, trochanters dull with lower half black; femora, tibiae, and tarsi reddish brown; abdominal sternites II-V orange with lateral margins black, VI orange with anterolateral margin black, VII bicolor with basal half black and posterior bright orange; spiracles orange (Fig. 343); pygophore bright orange. Integument. Body surface dull, almost glabrous; abdominal sternites, femora, and rostrum with short and scattered whitish to yellowish setae; tibiae as above but densely covered distally with yellow setae that continue on the tarsi; pygophore with two tufts of setae on the laterals of the postero-dorsal edge. Structure. Head wider than long, shorter than maximum length of pronotum; tylus broad and slightly exceeding juga; antenniferous tubercles unarmed; rostrum reaching posterior border of mesoesternum; rostral segment I longest, III shortest, II and IV subequal; pronotum wider than long; humeral areas produced into long and subtriangular projections; humeral angles acute; calli transverse, single, almost the width of the head; hind femora thin and unarmed, only with one row of tiny tubercles; hind tibiae terete; pygophore with two conical spines in the upper third lateral to midline and a medial lobe projecting posteriorly beyond the postero-ventral edge, the latter with the lateral angles slightly protruding, leaving between them a concavity, the center of which is projected a short, broad, and forked tongue (Figs. 344–345).   
 Female: Habitus and color like the male holotype, humeral angles more produced and wider than in this one (Fig. 346). Colorful areas of hemelytra with slightly more yellowish tones. Rostral segment IV reddish brown with middle third orange. Abdominal segments VIII and IX entirely bright orange. Genital plates. First gonocoxa bright orange with basal third black; paratergites entirely orange, very short, sum of both about half the length of gonocoxa. (Fig. 347).   
 Measurements. Holotype male: Body length 17.12 mm. Head: Length 1.33 mm; width 2.53 mm; interocular distance 1.48 mm; interocellar distance 0.42 mm; length of antennal segments: I, 4.65 mm; II, 3.40 mm. Pronotum: Length 2.76 mm; width across humeral angles 7.20 mm. Scutellar length 2.36 mm; width 2.12 mm.   
Female: Body length 19.77 mm. Head: Length 1.41 mm; width 3.46 mm; interocular distance 2.09 mm; interocellar distance 0.47 mm; length of antennal segments: I, 4.8 mm; II, 3.68 mm; III, 2.88 mm. Pronotum: Length 3.74 mm; width across humeral angles 8.74 mm. Scutellar length 3.28 mm; width 2.79 mm.  
 Diagnosis. Sundarellus orinoquensis can be distinguished from the other species of the genus Sundarellus by having the pronotal disc, thoracic pleura, and metathoracic peritreme completely orange, as well as by having the antennal segment I, femora, and tibiae reddish brown. In Sundarellus tiputinus Brailovsky & Barrera, the pronotal disc, thoracic pleura, and metathoracic peritreme are bicolored (bright orange and black), while the antennal segment I and legs are entirely orange (Brailovsky & Barrera 2020).   
 The dorsal coloration and pronotum shape of S. orinoquensis is similar to those of Malvanaioides decorata Brailovsky but the latter has a prorrect head, with the tylus and jugum with the characteristic shape of the tribe Anisoscelini, projecting far forward, well beyond the antenniferous tubercles and all femora spinose below (Brailovsky 2009c).   
 Etymology. Name given for the type localities located on the Colombian portion of the Orinoco basin.   
 Discussion. The male of S. tiputinus continues to be undescribed, and so we are unable to compare the male genitalia with that of this new species. Mattei & Mattei (2017), together with the Piaroa indigenous communities, catalogued some of the coreids found in the surroundings of Puerto Ayacucho, Venezuela. Their Figures 86 and 87 correspond, respectively, to a male and female of S. tiputinus, which is also the first record of the species outside of Ecuador. In these two photographs, it is possible to observe sexual dimorphism like that found in the species described here, where the humeral angles of the female are wider (Figs. 342–346). The presence of a conical tubercle in the male pygophore could be a useful character in the separation of this genus from other closely related ones. Cases like this highlight the importance of citizen science and the participation of communities in the generation of knowledge.
description: Published as part of Serna-Muñoz, Sebastian & Wolff, Marta, 2024, Leaf-footed Bugs (Hemiptera: Heteroptera: Coreidae) of Colombia: Annotated checklist, distribution, and description of a new species, pp. 1-95 in Zootaxa 5459 (1) on pages 57-63, DOI: 10.11646/zootaxa.5459.1.1, http://zenodo.org/record/11548162