Smicridea (Smicridea) jeaneae Desiderio, Pes & Hamada, 2021

Desiderio, Gleison Robson, Pes, Ana Maria, Andrade-Souza, Vanderly & Hamada, Neusa, 2021, The Smicridea (Smicridea) fasciatella species group (Trichoptera: Hydropsychidae) in Brazil: six new species and new distributional records, European Journal of Taxonomy 750 (1), pp. 156-196 : 175-178

Smicridea (Smicridea) jeaneae Desiderio, Pes & Hamada sp. nov.

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Figs 3 , 11 – 12

Diagnosis

Smicridea jeaneae sp. nov. also belongs to the albosignata complex.Among the species in this complex, it is most similar to S. bulbosa Flint, 1974 from Suriname based on the strong, parallel, pointed apicomesal lobes on tergum X and the short, slender apical segment of the inferior appendage with slightly acute apex. In both species the claw-shaped internal dorsolateral plates of the phallic apparatus are as long as the basal width, but in S. jeaneae sp. nov. the plates are straight mesally, while in S. bulbosa they are curved. In addition, the phallotremal sclerite of the phallic apparatus has a hastate shape distally in dorsal view and is kidney-shaped in lateral view in the new species, but is strap-like in dorsal view and rod-like in lateral view in S. bulbosa . Smicridea jeaneae sp. nov. can also be recognized by the three stout apical spine-like setae on the basal segment of the inferior appendage, one long seta dorsally and two mediumsized setae on the mesal margin.

Etymology

This new species is named in honor of Dr Jeane Marcelle Cavalcante do Nascimento (Instituto Nacional de Pesquisas da Amazônia, INPA – Brazil) for her valuable friendship, cooperation in the field and the laboratory, and in gratitude for her help in collecting material during the doctoral studies of the first author.

Material examined

Holotype BRAZIL • ♂; Amapá, Oiapoque, Oiapoque River, Buraco do Cristal ; 03º48′16″ N, 51º51′25″ W; 7 Dec. 2018; M. Silva leg.; INPA-TRI 000116 .

Description

Adult male ( Figs 11–12 )

FOREWING LENGTH. 6.37 mm (n = 1).

COLOR. General color dark brown (in alcohol) ( Fig. 11A ). Antennae yellowish brown ( Fig. 11A ). Head brown, with grayish to brown setae ( Fig. 11B–C ); dorsally with weakly pronounced median suture; with five setal warts; anteromesal wart small, rounded; anterolateral pair undivided, weakly delimited; posterolateral pair large, ovoid ( Fig. 11C ). Maxillary palp with segments 1–4 increasing gradually, about 0.8× in size toward the more apical segments, segment 5 long, about 1.2× as long as all previous segments combined ( Fig. 11B ). Thorax dark brown, covered with pale-brown setae; legs brown, with mid-leg tarsi yellowish ( Fig. 11A ). Wing venation typical for subgenus ( Fig. 11D–E ). Forewings, in alcohol, brown, with white transverse band subapically reaching base of R2+3, another arising on M1+2 and reaching base of Cu1a+b, and small white spot on apex of Cu2 ( Fig. 11D ). Sternum V with anterolateral glandular processes slightly shorter than sternum. Abdominal segments VI and VII with 2 pairs of internal glands, both pairs longer than their containing segments ( Fig. 11F ).

MALE GENITALIA ( Fig. 12 ). Segment IX in lateral view with anterolateral margin nearly straight, strongly sclerotized ( Fig. 12A ); posterodorsal margin bearing small spicules, distributed in two subtriangular bands ( Fig. 12B ). Tergum X elongate; in lateral view, ventrolateral margin strongly sclerotized, with three medium-sized, thin setae on apical third; apex with shallow notch, ending in a slender, straight lobe ( Fig. 12A ); in dorsal view, lateral margin slightly rounded; dorsomesal setose area bearing four mediumsized, thin setae; divided apicomesally by V-shaped incision about ½ its length; apex of tergite rounded, with strong, pointed apicomesal lobe, each bearing three medium-sized, thin apical setae ( Fig. 12B ). Inferior appendages 2-segmented; basal segment long, slightly inflated distally, covered with long, thin setae, with group of stout apical spine-like setae (one very long dorsal seta and two long setae on mesal margin); apical segment short, about ⅓ as long as basal segment, slender, strongly curved medially, apex slightly acute with numerous short, thin setae on mesal margin ( Fig. 12B ). Phallic apparatus long and tubular; basal section, in lateral view, enlarged, 4× diameter of phallotheca at its narrowest point, forming an angle of about 103° with apical section; median section of phallotheca straight, without processes ( Fig. 12C ); apex enlarged, with pair of claw-shaped internal dorsolateral plates, as long as basal width, straight mesally and directed posterad; endothecal membranes without spines; phallotremal sclerite, in dorsal view, distinct, strongly sclerotized, with U-shaped proximal region and hastate distal region ( Fig. 12D–E ); in lateral view, dorsal region kidney-shaped, ventrally slender and sinuous ( Fig. 12C ). Ejaculatory duct of endophallus, in lateral view, distinct, slightly sclerotized ( Fig. 12C ).

Bionomics

The only male specimen of S. jeaneae sp. nov. was collected near the Oiapoque River, at a place known as “Buraco do Cristal”; this river is about 400 m in width. The prevalent vegetation is Dense Ombrophilous Lowland Forest. The collection site is located in the northern-most part of the Brazilian Amazon.

Distribution ( Fig. 3 )

Brazil: Amazon (Amapá).

Figures

Fig. 3. Geographical distribution map for the new species of Smicridea McLachlan, 1871 treated in this study.

Fig. 11. Smicridea (Smicridea) jeaneae Desiderio, Pes & Hamada sp. nov., holotype, ♂ (INPA-TRI 000116). A. Lateral habitus, pinned. B. Head, right lateral view. C. Head, dorsal view. D. Forewing, right dorsal view. E. Hind wing, right dorsal view. F. Abdomen, ventral view. Scale bars in mm:A, D–F = 1; B–C = 0.5.

Fig. 12. Smicridea (Smicridea) jeaneae Desiderio, Pes & Hamada sp. nov., male terminalia, holotype (INPA-TRI 000116). A. Terga IX, X and inferior appendages, lateral view. B. Same, dorsal view. C. Phallic apparatus, lateral view. D. Apex of phallic apparatus, dorsal view. E. Apex of phallic apparatus (photograph). Scale bars in mm: A–C = 0.1; D–E = 0.05.