Ulmeritoides amajari Boldrini & Lima 2017, sp. nov.
Creators: name: Boldrini, R.
name: Lima, L. R. C.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Leptophlebiidae
Ulmeritoides
Ulmeritoides amajari

description: Ulmeritoides amajari sp. nov.
(Figs. 1–13)
Diagnoses. Ulmeritoides amajari sp. nov. can be separated from the other species of the genus by the following combination of characters. In the imago: 1) forewings hyaline, base brown and without dark spots in bullae in Sc and R1 (Fig. 4); 2) one cross-veins basal to bulla in forewings (Fig. 4); 3) abdominal color pattern as in Fig. 1; 4) penis lobe ending in an rounded apical projection (Fig. 7). In the female: forewings hyaline, base brown and without dark spots in bullae in Sc and R1; 2) one cross-veins basal to bulla in forewings; 3) abdominal color pattern as in Fig. 2. In the nymph: 1) medial denticle on anteromedian emargination of labrum much larger than others (Figs. 8, 8 a); 2) tusk on inner margin of maxillae well developed (Figs. 10, 10 a); 3) dorsum of fore femur with numerous, acute spines (Fig. 11); 4) lines of pectinate setae on ventral surface of tibia III forming one main line (Fig. 13).
Male Imago. Length: body: 5.5–6.2 mm; forewings: 5.7–6.5 mm; hind wings: 1.0– 1.1 mm.
General coloration brown (Fig. 1).
Head: flagellum light brown; ocelli white, reddish brown basally; upper portion of eyes reddish, lower portion blackish.
Thorax: pro-, meso- and metanotum brown; pro-, meso-, and metasternum reddish brown. Wings (Figs. 4, 5, 5 a): membrane of forewings (Fig. 4) hyaline, wing base light brown; main longitudinal and intercalaries veins light brown, cross-veins hyaline; one cross-vein basal to bulla. Membrane of hind wings (Figs. 5, 5 a) hyaline; longitudinal and cross-veins hyaline.
Legs (Fig. 1): Yellowish; middle region of all femora with short blackish mark. Leg I: femur washed with reddish brown; tibia washed with light brown, subapical portion of tibia with a black band; tarsi II and III washed with light brown. Tibia II and III with a reddish brown band apically.
Abdomen (Fig. 1): Terga reddish brown. Terga I, II and III darker. Terga I–VIII with lateral light reddish brown spots. Sterna light reddish brown.
Genitalia (Fig. 6): penis yellowish, washed with reddish brown basally, apex yellowish. Forceps yellowish, segment I and II washed with light brown. Apex of penis lobe ending in a inner rounded apical projection (Fig. 7), and with a lateral pointed projection (7a). [Caudal filaments broken off and lost].
Female imago. Length: body: 5.7–6.3 mm; forewings: 5.1–7.1 mm; hind wings: 1.1 mm.
General color light brown (Fig. 2).
Head: pedicel brown; ocelli white, blackish basally; area between lateral ocelli and eyes brown.
Thorax: Lateral margins of pronotum and pleura blackish. Wings. Wings membrane hyaline. Similar to male imago.
Legs (Fig. 2): light brown; middle region of all femora with short blackish marks; Leg I: femur washed with brown; tibia washed with light brown, subapical portion of tibia with a black band. Subbasal region of hind femur with a longitudinal blackish stripe. Tarsi II and III washed with black.
Abdomen (Fig. 2): Terga I, II and III darker; terga I–VIII with lateral light brown spots, and terga IV–VIII with a medial light brown spots. Sterna I–III darker. [Caudal filaments broken off and lost].
Nymph. Length: body: 6.3–7.1 mm. Nymphal exuviae: Tibia I: 1.2 mm; Tibia II: 1.1 mm; Tibia III: 1.3 mm.
General coloration: light brown to brown.
Labrum (Figs. 8, 8 a): Subrectangular, broader than long; with one middle larger and apically rounded denticle and four inconspicuous denticles.
Mandibles: Apical 1/2 of right mandible with inner and outer margin with fine long setae; inner and outer incisors with two and three denticles respectively. Apical 1/2 of left mandible (Fig. 9) with outer margin with fine long setae; inner and outer incisors with three denticles.
Maxilla (Figs. 10, 10 a): Small tusk on inner apical margin present; one robust and twelve subapical pectinate setae.
Labium: Segment I with fine, simple setae scattered on inner margin; outer margin with a row of setae increasing in length toward apex, long pectinate setae near apex. Segment II with fine, simple setae scattered on inner and outer margin; dorsally with a diagonal row of seven simple setae. Segment III with fine, simple setae scattered on inner and outer margin.
Thorax (Fig. 3): nota light brown.
Leg I (Fig. 11): Brown; subapical region of tibia dark brown. Femur outer margin with long, pectinate setae; dorsal surface with long, pectinate setae near outer margin, inner margin with spine-like pectinate setae and with spine-like setae on midline. Tibia inner margin with a row of long, pectinate setae; dorsal and ventral surface with fine, long, simple setae near outer margin, and with spine-like setae near inner margin. Tarsi inner margin with a row of spine-like setae, and outer margin with fine, long simple setae. Claws with six denticles increasing in length toward apex.
Leg II (Fig. 12): Femur similar to leg I.
Leg III (Fig. 13): Subapical region of tibia and tarsi dark brown. Femur outer margin with simple setae; inner margin with a row of spine-like setae. Tibia ventral surface with a row of long, pectinate setae; dorsal surface with a row of spine-like setae near inner margin; apex with five long, pectinate setae.
Abdomen (Fig 3): terga brown. Posterolateral projections lighter, present on abdominal segments II-IX. Sterna light brown. Gills gray. [Caudal filaments broken off and lost].
Distribution. Brazil: Roraima: Amajari municipality.
Material examined. Holotype. Male imago (reared), Brazil, Roraima, Amajari, Rio Amajari, below the bridge, 3°39’51.6’’N / 61°21’32.46’’W, 30.iii.2016, Boldrini, R. coll (INPA). Paratypes: Three female imago, Brazil, Roraima, Amajari, Rio Amajari, below the bridge, 3°39’51.6’’N / 61°21’32.46’’W, 16.ii.2016, Boldrini, R., Lima, L.R.C. coll (UFRR). Two female and one male imagos (all reared), Brazil, Roraima, Amajari, Rio Amajari, below the bridge, 3°39’51.6’’N / 61°21’32.46’’W, 16.ii.2016, Boldrini, R., Lima, L.R.C. colls (CZNC). Two female and three male imagos, Brazil, Roraima, Amajari, Rio Amajari, below the bridge, 3°39’51.6’’N / 61°21’32.46’’W, 30.iii.2016, Boldrini, R. coll (UFRR). Three imature nymphs, Brazil, Roraima, Amajari, Rio Amajari, below the bridge, 3°39’51.6’’N / 61°21’32.46’’W, 30.iii.2016, Boldrini, R. coll (UFRR).
Etymology. Amajari, name of the river where the material was collected.
Comments. The male imago of Ulmeritoides amajari sp. nov. have a forewing coloration and penis shape similar to that of the widespread species U. uruguayensis. Ulmeritoides amajari sp. nov. is distinguished from U. uruguayensis by apex of penis lobe; U. amajari sp. nov. has the apex of penis lobe ending in a inner rounded apical projection, while U. uruguayensis has the apex of penis lobe ending in a inner pointed apical projection. The nymphs of both species can be distinguished by lines of pectinate setae on ventral surface of tibia III (U. amajari has one main line, while U. uruguayensis, has two lines).
description: Published as part of Boldrini, R. & Lima, L. R. C., 2017, New species and stages description of Ulmeritoides Traver, 1959 (Ephemeroptera: Leptophlebiidae) from Roraima State, Northern Brazil, pp. 385-394 in Zootaxa 4282 (2) on pages 386-390, DOI: 10.11646/zootaxa.4282.2.11, http://zenodo.org/record/818787