Nilothauma leccii, Pinho & Andersen, 2021

Pinho, Luiz Carlos & Andersen, Trond, 2021, Neotropical Nilothauma Kieffer, 1921 (Diptera, Chironomidae): Key, eleven new species, re-descriptions, new combination and new records, ZooKeys 1033, pp. 81-125 : 81

publication ID

https://dx.doi.org/10.3897/zookeys.1033.60686

publication LSID

lsid:zoobank.org:pub:BEFB015F-4A35-4987-AD10-DFEB7D4F91DD

persistent identifier

https://treatment.plazi.org/id/CBFC7D88-17AB-4BF8-9CBA-2995FDAB798B

taxon LSID

lsid:zoobank.org:act:CBFC7D88-17AB-4BF8-9CBA-2995FDAB798B

treatment provided by

ZooKeys by Pensoft

scientific name

Nilothauma leccii
status

sp. nov.

Nilothauma leccii sp. nov. Figures 7A, B View Figure 7 , 16B View Figure 16

Type material.

Holotype male, slide-mounted: Brazil, São Paulo, São Sebastião, Rio das Pedras, 23°44'27"S, 45°37'12"W, 28.x.2005, light trap, A.R. Calor et al. leg. (UFSC).

Etymology.

The specific epithet is a noun in the genitive case honouring Lucas Silveira Lecci, for his friendship and prolific fieldwork.

Diagnostic characters.

The male can be separated from its congeners by its large size combined with unmarked wing; spatulate anal point; superior volsella leaf-shapped; inferior volsella with strong, split setae and digitiform and strongly setose gonostylus.

Description.

Male imago (n = 1). Total length 4.35 mm. Wing length 1.96 mm. Total length/wing length 2.22. Wing length/length of profemur 2.45.

Colouration. Thorax and legs brown, abdomen light brown. Wing membrane without dark markings.

Antenna. AR = 0.16. Thirteenth flagellomere 124 µm long.

Head. Temporal setae 6 in single row. Clypeus with 15 setae. Tentorium 113 µm long, maximum width 25 µm. Stipes not measurable. Palp segment lengths (in µm): 37, 33, 74, 107, 138. Third palpomere with 2 sensilla clavata subapically, longest about 25 µm long. Fifth palpomere/third palpomere 1.86.

Thorax. Antepronotum with 4 setae. Dorsocentrals 17 partly biserial posterior, acrostichals 14, prealars 6. Scutellum with 13 setae.

Wing. VR = 1.53. Brachiolum with 2 setae, R with 15 setae, R1 with 24 setae, R4+5 with 31 setae, remaining veins bare.

Legs. Spur of fore tibia 65 µm long including 41 µm long scale. Mid-tibia with 1 spur, 47 µm long; hind tibia with 2 spurs, 43 and 65 µm long. Combs of mid-tibia 29 µm long, of hind tibia 47 µm long. Width at apex of fore tibia 69 µm, of mid-tibia 73 µm, of hind tibia 89 µm. Lengths and proportions of legs as in Table 6 View Table 6 .

Hypopygium (Fig. 7A, B View Figure 7 ). Tergite IX without dorsal lobes, posterior margin subtriangular with 7 setae to each side of the anal point. Anal point spatulate, 59 µm long, 10 µm wide basally, 17 µm wide medially. Tergite bands not continuous. Laterosternite IX with 4 setae. Phallapodeme 61 µm long; transverse sternapodeme 35 µm long. Gonocoxite 171 µm long. Inferior volsella weakly curved, 113 µm long, 15 µm wide subapically, with microtrichia and 7 strong, apically split setae. Superior volsella leaf-shaped, 69 µm long, 10 µm wide at base, 23 µm wide medially, covered with microtrichia and with few weak setae ventrally and along inner margin. Median volsella narrow, 48 µm long, covered with microtrichia and with 4 setae on tubercles at apex, setae about 23 µm long. Gonostylus digitiform, strongly setose, 163 µm long, 37 µm wide medially. HR = 1.05. HV = 2.67.

Female adult and immatures.

Unknown.

Distribution

(Fig. 16B View Figure 16 ). Only known from São Paulo State in Brazil.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae

Genus

Nilothauma