Diplectrona Westwood,

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: 6-7

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Diplectrona Westwood


Diplectrona Westwood 

( Figs 1–48View FIGURES 1–9View FIGURES 10–16View FIGURES 17–31View FIGURES 32–48)

Diplectrona Westwood 1839  , 49. Type species, Diplectrona felix McLachlan 1878  , under Plenary Powers, ICZN Decision 758 [1966]. [See Fischer (1963a, 1972) and Morse (2017) for full taxonomic literature on Diplectrona  and its included species.]

Diemeniluma Neboiss 2003  , 71. Type species, Diplectrona tasmanica Jacquemart 1965  , by original designation. New synonym.

Diagnosis. In the Australian hydropsychid fauna, Diplectrona  resembles Austropsyche  and Arcyphysa  gen. nov. in having fork 2 in both wings usually sessile, and in the hind wing Sc and R distally curved towards the costal margin, but is distinguished from Arcyphysa  in having on the dorsal head the anterolateral setal warts undivided or incompletely divided; and from Austropsyche  in having the anterolateral warts at most with an incomplete, indistinct, median suture, not fragmented posteriorly; and coxopodites of male gonopods simple, without mesal processes.

Description. Medium-sized caddisflies. Head ( Figs 17–21View FIGURES 17–31) dorsally with 5 setal warts, anterolateral warts wider than long, undivided or incompletely and indistinctly divided, crowded by pair of large posterior warts. Maxillary palpi ( Figs 2View FIGURES 1–9, 27–28View FIGURES 17–31) with segments 2 and 3 equal length, 4 slightly shorter, segment 5 exceeding length of 2+3+4. Antennae with at least distal segments bearing sutures and tufts of setae, giving crenate appearance ( Figs 25–26View FIGURES 17–31). Midtibiae and tarsi not dilated. In both pairs of wings fork 2 sessile ( Figs 1View FIGURES 1–9, 22, 24View FIGURES 17–31) or very short ( Fig. 23View FIGURES 17–31); forewings each with vein A1+2+3 curved, cell ac lanceolate to subtriangular; hind wings each with Sc and R with pronounced posterior curvature distally before wing margin. Abdomen with pair of filaments laterally on segment V ( Figs 30–31View FIGURES 17–31), length variable; in male reticulate-walled internal sacs ( Fig. 29View FIGURES 17–31) spherical to elongate-ovoid. Male genitalia ( Figs 3–12, 14–16View FIGURES 1–9View FIGURES 10–16, 32–43, 45–46) with midapicolateral margin of segment IX often extended into paired distinct triangular lobes (‘phallic guides’ or ‘clasper guides’ of Ross & Morse, unpublished MS); phallus with or without spines or spicules distally. Female terminal abdomen ( Figs 13View FIGURES 10–16, 44, 47–48View FIGURES 32–48) with sternite VIII comprising two sclerites, usually separated ventromesally, produced apicolaterally, apical tubercles on segment X small.

Remarks. Continued separation of Diemeniluma  from Diplectrona  is unsupported. Diemeniluma  was erected on the basis of rather weak features. The key characteristic of absence of anteromesal wart on the vertex of the head was erroneous as there is a small round wart between the two large, undivided anterolateral warts ( Figs 18, 19View FIGURES 17–31)— the arrangement of head warts in Diemeniluma  closely resembles that seen in a specimen of the type species, Diplectrona felix  ( Fig. 17View FIGURES 17–31). The female characteristics of Diemeniluma  as given by Neboiss (2003) —abdominal 'sternite VIII entire, not divided ventromesally; segment IX without lateral scleritic cavity, sternite three-lobed'— have not been confirmed in the genitalic preparation of the female identified, as that of D. tasmanica  cannot be located in the NMV collection. However, a single female in ANIC, tentatively associated with a male of D. tasmanica  , does show at least some slight midventral separation of sternite VIII ( Fig. 44View FIGURES 32–48); the female is not known for the second species, D. serrula ( Neboiss 2003)  . The nature of the triangular midapicolateral structures on segment IX of male D. inermis ( Banks 1939)  , and D. spinata ( Banks 1939)  (the ‘phallic guides’) becomes apparent when D. tasmanica  is viewed laterally. With greater or lesser fusion of segments IX and X these become more closely associated with tergite X as in D. tasmanica  (compare Figs 3, 5View FIGURES 1–9 and 42, 43).


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Diplectrona Westwood

Wells, Alice & Contents, Arturs Neboiss Table Of 2018

Diemeniluma Neboiss 2003

, Neboiss 2003

Diplectrona tasmanica Jacquemart 1965

Jacquemart, Revised 1965

Diplectrona felix

McLachlan 1878

Diplectrona Westwood 1839

Westwood. For 1839


Westwood. For 1839