Xiphocentron (Antillotrichia) maracanan, Vilarino & Cavalcante & Dumas & Nessimian, 2018

Vilarino, Albane, Cavalcante, Bruna Maria Silva, Dumas, Leandro Lourenço & Nessimian, Jorge Luiz, 2018, Four new species of Xiphocentron Brauer, 1870 (Trichoptera: Xiphocentronidae) from the Atlantic Forest, southeastern Brazil, European Journal of Taxonomy 441, pp. 1-16 : 7-8

publication ID

https://doi.org/ 10.5852/ejt.2018.441

publication LSID

lsid:zoobank.org:pub:22EF1EE7-D663-4795-8FF6-B5C5ABF555DA

DOI

https://doi.org/10.5281/zenodo.3846701

persistent identifier

https://treatment.plazi.org/id/757CC480-9BF8-4E4F-8661-271FD6FC38C2

taxon LSID

lsid:zoobank.org:act:757CC480-9BF8-4E4F-8661-271FD6FC38C2

treatment provided by

Valdenar

scientific name

Xiphocentron (Antillotrichia) maracanan
status

sp. nov.

Xiphocentron (Antillotrichia) maracanan sp. nov.

urn:lsid:zoobank.org:act:757CC480-9BF8-4E4F-8661-271FD6FC38C2

Figs 4–5 View Fig View Fig

Diagnosis

The new species is characterized by a strongly bent inferior appendage (at an angle of about 90° between the base and the apex), with a set of small spines, ranging from the mesal sclerite to near the apex. Moreover, tergum IX has a posterior margin forming a slightly concave central incision with acute sides. The new species has a similar forewing venation as in X. cobacabana sp. nov., with a sessile fork II. The genitalia of the two species are, however, very different.

Etymology

The specific epithet refers to the soccer stadium Estádio Jornalista Mário Filho, located in the city of Rio de Janeiro, and popularly known as Maracanã.

Material examined

Holotype

BRAZIL: ³, Rio de Janeiro State, Rio de Janeiro, Parque Nacional da Tijuca, Rio Taquaruçú (below the waterfall), 22°57′36.2″ S, 43°17′36.2″ W, alt. 509 m, 7 Sep. 2016, B.M. Silva, L.L. Dumas, J.L. Nessimian and F. Quintarelli leg. ( DZRJ 7335 ).

GoogleMaps

Paratype

BRAZIL: 1 Ƌ, Rio de Janeiro State, Rio de Janeiro, Parque Nacional da Tijuca, Caminho do Moke, Rio do Moke, 22°58′29.8″ S, 43°15′52.7″ W, alt. 355 m, 6 Feb. 2017, A.L. R. Silva, B.M. Silva, J.L. Nessimian, A.S. Nascimento and A.L.H. Oliveira leg. ( MZSP 5412).

Description

Adult

Forewing length 3.7–4.2 mm (n = 2). Overall color (in alcohol) nearly uniformly medium brown. Tibial spur formula 2-4-3. Hind tibia apical spurs not modified ( Fig. 4A View Fig ). Forewings covered with uniformly fine brown setae, with opaque region on anterior margin between Sc and R1 veins. Wing venation ( Fig. 4B View Fig ). Forewings: forks II and IV present; Sc reaches costa and then curves meeting R1; fork II sessile starting in discoidal cell; thyridial cell closed; two anal veins present. Hind wings: forks II and V present; Rs with three branches R2+3, R4 and R5; R1 absent. Abdominal sternum V bearing pair of mammiform glandular regions.

Male genitalia ( Fig. 5 View Fig A–E)

Tergum IX, in lateral view ( Fig. 5A View Fig ), ventrally broader, dorsal margin straight, anteroventral margin rounded, dorsal region of posterior margin projected posterad, forming a lobe; in dorsal view ( Fig. 5B View Fig ), anterior margin with deep V-shaped central incision, posterior margin mesally projected, with slightly concave central incision forming acute edges. Sternum IX, in lateral view ( Fig. 5A View Fig ), dorsal margin rounded, anterior margin with medial apodeme, ventrally with acute indentation, ventral margin rounded, posterior margin truncate; apodeme apically acuminate; in ventral view ( Fig. 5C View Fig ), with posterior margin produced, bearing medial V-shaped incision, anterior margin straight, lateral apodemes about half as long as sternum IX, strongly tapered apically. Segment X semi-membranous; in lateral view ( Fig. 5A View Fig ), elongated, apicodorsally truncated, apicoventrally produced; in dorsal view ( Fig. 5B View Fig ), wider apically, constricted near mid-length, closed all over its length, medially with sclerotized band, apex split into two lobes; in ventral view ( Fig. 5C View Fig ), concave apically, ventral region of segment cleft apically.

Preanal appendages elongated, about 1.5 × as long as segment X, setose; in lateral view ( Fig. 5A View Fig ), basally directed posterodorsally, then bent posterad near mid-length, enlarged and rounded apically; in dorsal view ( Fig. 5B View Fig ), slightly enlarged basally, slightly tapered apically, apex obtuse. Inferior appendages with articles completely fused; basal region, in lateral view ( Fig. 5A View Fig ), broad, bent 90° with respect to apical region, posteroventral margin not produced; apical region as long as basal region, slender, in dorsal view ( Fig. 5B View Fig ), with apex slightly enlarged; inner face with spines ranging from mesal sclerite until apical region; in lateral view ( Fig. 5A View Fig ), spines in a row on ventral margin of apical region; mesal sclerite small, with basal spine (only clearly visible in ventral view).

Phallus tubular, long and slender, in lateral view ( Fig 5D View Fig ), apex almost as broad as the base; in dorsal view ( Fig 5E View Fig ), apex not enlarged, semi-membranous, cleft apically.

R

Departamento de Geologia, Universidad de Chile

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Trichoptera

SuperFamily

Psychomyioidea

Family

Xiphocentronidae

Genus

Xiphocentron

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