Austronemoura rufescens ( Blanchard, 1851 ),

Murányi, Dávid, Gamboa, Maribet & Vera, Alejandro, 2016, Lost and found: the Plecoptera types of Blanchard and Mabille, with further contributions to the stoneflies of Chile, Zootaxa 4200 (4), pp. 544-560: 549-550

publication ID

http://doi.org/10.11646/zootaxa.4200.4.6

publication LSID

lsid:zoobank.org:pub:DCE541D0-8DC7-4CEC-BA5A-EA1015F0C1F2

persistent identifier

http://treatment.plazi.org/id/A1188790-FF95-FF8D-AA90-32C56A2C6C33

treatment provided by

Plazi

scientific name

Austronemoura rufescens ( Blanchard, 1851 )
status

comb. n.

Austronemoura rufescens ( Blanchard, 1851)  , comb. n.

( Figs. 9–20View FIGURES 9 – 13View FIGURES 14 – 20)

Nemoura rufescens Blanchard, 1851  — Blanchard 1851: 102. (original description of the adult); Blanchard 1854: Pl. 1., Fig. 5View FIGURES 3 – 8. (habitus figure on a syntype); Claassen 1940: 62. (catalog, valid species); Aubert 1960: 60. (nomen nudum); Illies 1961: 99. (nomen nudum); Illies 1966: 472. (nomen oblitum); Hallan 2006 (catalog, nomen oblitum); Froehlich 2010: 187. (catalog, nomen oblitum); DeWalt et al. 2016 (catalog, valid species).

Perla infuscata Blanchard, 1851  , syn. n. — Blanchard 1851: 100. (original description of the adult); Jakobson & Bianchi 1905: 617. ( Perla blanchardi  nom. n., nec. Isogenus infuscatus Newman, 1838  = Perla infuscata (Newman, 1838)  comb. n. Pictet, 1841); Claassen 1940: 134. (catalog); Illies 1964b: 209. (nomen nudum); Froehlich 2010: 187. (catalog, nomen praeoccupatum); DeWalt et al. 2016 (catalog, synonym).

Perla blanchardi Jakobson & Bianchi, 1905  , syn. n. — Jakobson & Bianchi 1905: 617. (nom. n. for Perla infuscata Blanchard, 1851  ); Claassen 1940:134. (catalog); Illies 1964b: 209. (nomen nudum); Illies 1966: 498. (nomen oblitum); Froehlich 2010: 187. (catalog, nomen oblitum); DeWalt et al. 2016 (catalog, nomen dubium in Anacroneuriini  Stark & Gaufin, 1976, not classified to genera).

Diagnosis. Male paraproct: lower lobe slender, strongly curved and with an apical spine; upper lobe with widened base, and laterally flattened, strongly curved medial and apical section, with two small apical spine. Male epiproct: dorsal plate lacks basal callus, with raised, diverging dark projections; lower cup wide and bulging, with distinct, beak-like apex.

Material examined. LECTOTYPE ♂ of Nemoura rufescens Blanchard, 1851  , present designation: CHILE, Valdivia ( NMPC, transferred to alcohol vial) ( Labels , kept in box IV.17: Museum Paris / Chili / Gay 15-43 (printed); 15 / 43 (handwritten round label); Type (red, printed); Valdivia (handwritten, maybe of Gay))  ; LECTOTYPE ♂ of Perla infuscata Blanchard, 1851  , present designation: CHILE ( NMPC, transferred to alcohol vial) ( Labels , kept in box IV.17: Museum Paris / Chili / Gay 15-43 (printed); 15 / 43 (handwritten round label); Type (red, printed); Perla  / infuscata  / Blanc (Blanchard handwritten))  ; CHILE, Region XIV (Los Ríos), Valdivia, Oncol , 13.i.2006, leg. Arias, E.: 1♂ ( MCCN)  .

Redescription. Medium sized species, macropterous ( Figs. 16–20View FIGURES 14 – 20). Forewing length: lectotype of N. rufescens  6.2 mm, lectotype of P. infuscata  6.8 mm. Head brown, details shaded by desiccation, antenna probably darker. Pronotum wider than long, corners rounded. Legs pale, femora with darker distal ring; wings with brownish pattern but obscured by specimen condition, venation brown. Abdomen pale except for brown terminal segments. Pilosity generally short but longer on terminalia.

Male terminalia ( Figs. 9–13View FIGURES 9 – 13): Sternite IX with thin basal bars medially connected and holding a moderatelly long vesicle; vesicle three times longer than wide, apical half armed with short, stocky spines. Subgenital plate is separated from other sclerites, square but posterior margin rounded, its apex broadly upcurved then continued in a straight, needle-like apex as long as the vesicle; the apex is bare, while the subgenital plate bear long setae. Paraproct fully divided into lower (medial) and upper (dorso-lateral) lobes. Lower lobe is slightly bulging basally, medial portion thin while apex widened again, with rough inner surface and a terminal spine; the lobe laterally diverging, then the apex curved inwards, bear scarce setation but with longer setae on inner surface of the apex. Upper lobe with basal section widened, densely setose and distinct from the bare, laterally flattened medial section that is curved dorsad, bear well sclerotized, inner-medial ridge; apex is forming a laterally flattened and rounded pocket at the end of the ridge, its dorsal surface bear short but distinct setae and two small apical spines on dorsal surface. Cerci long and slender, with slightly pointed apex. Tergite IX weakly sclerotized and unmodified. Tergite X medially connected only with weak antecosta, dorso-lateral portion with indistinct humps. Median sclerite weakly sclerotized and setose, hardly limited from dorsal plates of epiproct. Epiproct consist of strong dorsal plate, stripe-like lateral bars and bulging lower cup. Dorsal plate of epiproct bear no basal callus, basally narrow and covered with dense setae but its raised, paired dark apical portion is bald; the two projections diverging and separeted by a narrow membranous medial area. Lateral epiproct bars are slightly undulated, each ends in knoblike apex beneath the dark projections of the dorsal plate. Lower cup of epiproct basally weakly sclerotized but bear dense, long setae, wide and curved up dorsally; its apex is distinctly separated, beak-like and strongly sclerotized, directed backward and points to the dorsal plate.

Female: Unknown.

Affinities. Austronemoura rufescens  seems to be the closest to A. chilena Aubert, 1960  and A. auberti McLellan & Zwick, 1996  , having similar paraprocts and ventral surface of the terminalia. However, distinctly differs from the above species by the lack of basal callus and presence of diverging apical projections on the dorsal plate of epiproct. The combination of paraproctal and epiproctal characters clearly separate A. rufescens  from the seven further congeneric species.

Distribution. The species was described on the basis of specimens from Valdivia and San Carlos. Unfortunately, no identifiable specimens remained from San Carlos, and the lectotype of P. infuscata  bears no locality data besides “ Chile ”. Presently, we have to treat this species as restricted to the vicinity of Valdivia, from where we can confirm from a recently collected specimen.

Remarks. In the original box, there were three specimens pinned together as types of N. rufescens  ( Fig. 14View FIGURES 14 – 20). Whereas the specimen bearing an identification label with Blanchard's handwriting is detached from the plastic sheet and the specimen from San Carlos is represented by only a forewing fragment, the Valdivia specimen is in relatively good condition. Characters of the latter agree well with the brief description and the original figure that clearly depicts a Notonemouridae  , thus, we feel justified to designate this specimen as the lectotype. As already mentioned above, the three identifiable syntypes of P. infuscata  belong to three genera ( Fig. 15View FIGURES 14 – 20). The brief original description does not allow a conclusion if it is a Notonemouridae  or a Gripopterygidae  . In addition, for nomenclatorial stability, the fact that the Austronemura specimen is the one bearing Blanchard's handwritten identification label justifies its selection as the lectotype and to further treat P. infuscata  and P. blanchardi  as junior subjective synonyms of A. rufescens  .

NMPC

National Museum Prague

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Plecoptera

Family

Notonemouridae

Genus

Austronemoura

Loc

Austronemoura rufescens ( Blanchard, 1851 )

Murányi, Dávid, Gamboa, Maribet & Vera, Alejandro 2016
2016
Loc

Perla blanchardi

Froehlich 2010: 187
Illies 1966: 498
Illies 1964: 209
Claassen 1940: 134
Jakobson 1905: 617
1905
Loc

Nemoura rufescens

Froehlich 2010: 187
Illies 1966: 472
Illies 1961: 99
Aubert 1960: 60
Claassen 1940: 62
Blanchard 1851: 102
1851
Loc

Perla infuscata

Froehlich 2010: 187
Illies 1964: 209
Claassen 1940: 134
Jakobson 1905: 617
Blanchard 1851: 100
1851