Arcyphysa angusta,

Wells, Alice & Contents, Arturs Neboiss Table Of, 2018, Australian Diplectroninae reviewed (Insecta: Trichoptera), with description of 21 new species, most referred to a new genus, Zootaxa 4415 (1), pp. 1-44: 25-27

publication ID

https://doi.org/10.11646/zootaxa.4415.1.1

publication LSID

lsid:zoobank.org:pub:5DAA824F-BCBD-47FF-9948-F7EC45829AEB

persistent identifier

http://treatment.plazi.org/id/03D65762-334B-3F25-908B-26209DC4B8BB

treatment provided by

Plazi

scientific name

Arcyphysa angusta
status

 

Arcyphysa angusta  Group

( Figs 104–105View FIGURES 102–109, 146, 158–159View FIGURES 146–163, 179–180)

Arcyphysa angusta (Banks) 

Diplectrona angusta Banks 1939  , 495; Mosely & Kimmins 1953, 337.

Material examined. Holotype ♂, Dorrigo, NSW ( ANIC, ex MCZ 22087View Materials); 1♂, 2♀, NSW, Styx River, 12 km S of Ebor, 17.x.1973, A. Neboiss ( NMV [PT-1005]).

Diagnosis. This species resembles Arcyphysa diamontona  sp. nov. in having the gonopods in ventral view widely bowed, but is distinguished from Arc. diamontona  by having dorsal processes clearly arising on abdominal tergite IX and lanceolate, not club shaped, and by lacking sharp spines apicolaterally on sternite IX; harpagones are leaf-like, rounded apically, not acute as in Arc. diamontona  .

Description. Length of each forewing: ♂ 10.0 mm (n = 2), ♀ 10.4 mm (n = 2); forewing median cell length about 5x maximum width.

Male. Abdomen with internal reticulate-walled internal sacs all elongate oval, about length of segments.

Male genitalia ( Figs 104–105View FIGURES 102–109, 158–159View FIGURES 146–163): Segment IX short, apicolaterally expanded distally to form subtriangular lobe; apicolateral processes elongate, lanceolate, about twice length of tergite X, in ventral view with convergent club-shaped lobes densely clothed in short setae; tergite X compressed, taller than long; phallic apparatus without parameres, in ventral view wide at base, in lateral view with apex curved downward; gonopods each with coxopodite stout, strongly curved in ventral view, width almost equal throughout length, harpagones leaf-shaped, about 1/3 length of coxopodites, curved gently, tapered to rounded apices.

Female ( Figs 179–180View FIGURES 179–187). Abdomen terminating bluntly; distally with pair of cerci and 2 pairs of small terminal protuberances; sternite VIII formed by 2 ventrolateral plates (valves) covering inferior appendage receptacle grooves, fully divided mesally, apicolateral angles produced, broadly rounded; segment IX with rounded sclerotic cavity, its inner surface granular.

Distribution. Collected only from north-eastern New South Wales.

Remarks. Banks (1939, 495) interpreted the paired apicolateral structures in Arc. angusta  as part of the ‘superior plate’. Here these structures are interpreted as apicolateral processes on abdominal tergite IX. The arrangement in Arcyphysa angusta  contrasts with the arrangement in Arc. diamontona, Arc.  hystricosa  , and Arc. fraserensis  in which abdominal segment IX and tergite X appear to be fused, with the result that the apicolateral lobes appear to arise from the fused structure.

NSW

Royal Botanic Gardens, National Herbarium of New South Wales

ANIC

Australian National Insect Collection

MCZ

Museum of Comparative Zoology

NMV

Museum Victoria

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Trichoptera

Family

Hydropsychidae

Genus

Arcyphysa

Loc

Arcyphysa angusta

Wells, Alice & Contents, Arturs Neboiss Table Of 2018
2018
Loc

Diplectrona angusta

Banks 1939
1939