Poxyaibamberus ubajarensis Andersen & Dantas, 2024

Andersen, Trond, Dantas, Galileu P. S., Baranov, Viktor, Sanz-laParra, Annui M., Mendes, Humberto F. & Hamada, Neusa, 2024, Poxyaibamberus Andersen & Dantas, gen. nov. (Diptera, Chironomidae, Orthocladiinae) from Brazil, ZooKeys 1205, pp. 1-15 : 1-15

publication ID	https://doi.org/ 10.3897/zookeys.1205.124081
publication LSID	lsid:zoobank.org:pub:8D5E77EA-DD32-4E89-868B-17475C16DBA7
DOI	https://doi.org/10.5281/zenodo.11658948
persistent identifier	https://treatment.plazi.org/id/E8261BAB-A560-419E-AF25-4951A909D760
taxon LSID	lsid:zoobank.org:act:E8261BAB-A560-419E-AF25-4951A909D760
treatment provided by	ZooKeys by Pensoft
scientific name	Poxyaibamberus ubajarensis Andersen & Dantas
status	sp. nov.

Treatment

Poxyaibamberus ubajarensis Andersen & Dantas sp. nov.

Figs 1 C – F View Figure 1 , 4 View Figure 4

Type locality.

Brazil, Ceará State, Ubajara, Ubajara National Park GoogleMaps , Cafundó waterfall GoogleMaps , 03 ° 50 ' 13 " S, 40 ° 54 ' 35 " W, 805 m a. s. l., 25–26 February 2023, N. Hamada, J. Silva, J. M. C. Nascimento, G. P. Amorim Jr. leg.

Type specimen.

Holotype male adult, slide-mounted in Euparal under five coverslips. Original label: “ Brasil, CE, Ubajara, Parque Nacional de Ubajara, Cachoeira do Cafundó , 25-26 / 02 / 2023, light-trap, N. Hamada ” ( INPA). GoogleMaps

Diagnostic characters.

The new species can easily be separated from P. jamanximensis Andersen & Dantas , sp. nov. on the shape of the gonostylus, as it has a rather broad, curved, tapering heel that is slightly shorter than the gonostylus proper.

Description.

Adult male (n = 1). Total length 2.02 mm. Wing length 1.13 mm. Total length / wing length 1.70. Wing length / length of profemur 2.38.

Coloration. Head, thorax, and legs light brown; abdomen pale brown. Wing hyaline.

Antenna. Antenna broken. With 44 µm long subapical setae.

Head. Inner verticals 5, outer verticals 3, postorbitals not discernable. Clypeus with 5 setae. Tentorium 90 µm long, 13 µm wide. Stipes not discernable. Anterior margin of cibarial pump slightly concave. Palp (Fig. 1 C View Figure 1 ) with five segments; palpomere lengths (in µm): 17, 22, 35, 39, 37. Third palpomere without sensilla clavata.

Thorax (Fig. 1 D View Figure 1 ). Antepronotum with 2 ventrolateral setae. Acrostichals very small, at least 4 in double row in anterior part of scutum; dorsocentrals 6, uniserial; prealars 3. Scutellum apparently without setae.

Wing. VR = 1.33. Brachiolum with 1 seta, other veins and membrane bare. Squama bare. Costal extension 113 µm long.

Legs. Fore tibia (Fig. 1 E View Figure 1 ) with 30 µm long spur, mid tibia with 29 µm and 14 µm long spurs, hind tibia (Fig. 1 F View Figure 1 ) with 35 µm and 18 µm long spurs. Width at apex of fore tibia 28 µm, of mid tibia 29 µm, of hind tibia 30 µm. Hind tibia with comb of 4 bristles, longest 22 µm long. Lengths and proportions of legs as in Table 2 View Table 2 .

Hypopygium (Fig. 4 A, B View Figure 4 ). Anal point large, narrowly triangular with rounded apex, projecting from posterior margin of tergite IX, with microtrichia, 55 µm long, 28 µm wide near base, 8 µm wide medially. Tergite IX with 9 setae medially. Laterosternite IX with 2 setae. Phallapodeme 68 µm long. Transverse sternapodeme straight, without oral projections, 41 µm long. Virga apparently consisting of balloon-shaped ball of lamella with small spines. Gonocoxite 168 µm long. Gonostylus 79 µm long; heel curved, tapering, 72 µm long, 24 µm wide medially; megaseta 8 µm long. HR = 2.13; HV = 2.56.

Immatures and female. Larva, pupa, and female are unknown.

Etymology.

The epithet, ubajarensis , is used as an adjective and meaning “ from Ubajara ” in reference to the place of origin of the holotype.

Distribution.

The species is known only from the type locality in the Ubajara National Park in northeastern Brazil. The park covers an area of 6.288 ha and receives abundant rainfall, averaging 1.400 mm annually, while temperatures typically range between 22 ° C and 26 ° C. The vegetation in the park is characterized by its high diversity, with higher elevations adorned by lush humid forests ( Figueiredo 1997; Souza 1997). Lower elevations feature semi-deciduous tropical rainforest on sloping areas and arboreal Caatinga (thorny deciduous forest) in the lower regions. The specimens were collected using a light trap placed about 20 m upstream of a waterfall (Fig. 5 View Figure 5 ) at an elevation of 805 m a. s. l. At the sampling time, water temperature was 21.5 ° C, pH was 7.05, and electric conductivity was 137.6 µS / cm.