Banyallarga (Histricoverpa), Prather Table Of Contents, 2004

Prather Table Of Contents, Aysha L., 2004, Revision of the Neotropical caddisfly genus Banyallarga (Trichoptera: Calamoceratidae), Zootaxa 435 (1), pp. 1-76 : 22-23

publication ID 10.11646/zootaxa.435.1.1


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scientific name

Banyallarga (Histricoverpa)

new subgenus

Histricoverpa , new subgenus

Figs. 16–36 View FIGURE 16 View FIGURE 18 View FIGURE 19 View FIGURE 20 View FIGURE 21 View FIGURE 22 View FIGURE 23 View FIGURE 24 View FIGURE 25 View FIGURE 26 View FIGURE 27 View FIGURE 28 View FIGURE 29 View FIGURE 30 View FIGURE 31 View FIGURE 32 View FIGURE 34 View FIGURE 35 View FIGURE 36

Type species: Ganonema molliculum McLachlan 1871 .

This subgenus includes two species originally described in Murielia Hogue and Denning 1983 (in Denning et al. 1983). The genus was largely established to accommodate these two species, (described in the same paper), but the authors chose to select Phylloicus farri Flint (1968) as the type species for their new genus, based on what they believed to be synapomorphies. However, Flint et al. (1999b) recognized that the type species of Murielia is a true species of Phylloicus and therefore synonymized Murielia with Phylloicus . He transferred the two new species of Murielia described in Denning et al (1983) to Banyallarga . However, the new species described in Murielia , Banyallarga acutiterga and B. fortuna , along with a Venezuelan species, B. mollicula , and several new species from Central America and northwestern South America do form a distinct clade within Banyallarga ( Fig. 37 View FIGURE 37 ), whose distinctiveness was first recognized by Hogue and Denning. This clade is here described as a new subgenus of Banyallarga .

Histricoverpa is distinguished from its sister subgenus by several characters. A pointed mesal process is present on the anterior margin of sternum VII ( Fig. 16 View FIGURE 16 ), in some species also on sternum VI. The abdominal terga lack anteromesal notches. In males of several species ( B. acutiterga , echinata , fortuna , nica , quincemil , and sylvana ; the single male specimens of mexicana and sanchezi have lost segment IV) the lateral margin of sternum IV is deeply excavated ( Fig. 16 View FIGURE 16 ); possibly this is related to the function of an abdominal glandular structure. In B. acutiterga ¸ echinata , fortuna , nica , quincemil , sylvana , and tapanti , the posterolateral margin of segment IX is broadly produced as a rounded lobe (Fig. 17A). Generally, the preanal appendages are much longer than tergum X, except in B. mollicula , and are somewhat flexible distally. The name refers to the thornlike setae on the phallic endothecal membrane (Figs. 17D, 21D), which are unique to the species in this subgenus. The endotheca was fully everted in only a few specimens, so I am unable to assess whether the arrangement of the thornlike setae is species­specific. In the female, the posterior end of the spermatheca is sclerotized as a sphere, with a posterior invagination where the spermathecal duct enters ( Fig. 20A View FIGURE 20 ).

Male. In some species, sternum IV lateral margin deeply excavated ( Fig. 16 View FIGURE 16 ). Tergum IX very short mesally; anterolateral margin of segment IX with broad rounded anterior process (Fig. 17A). Preanal appendages usually much longer than tergum X, narrow, several times longer than wide. Phallic endotheca bearing numerous thornlike setae or spines (Figs. 17D, 21D).

Female. Tergum IX with anterior marginal ridge entire, mesal ridge sometimes present. Sternum IX with anterior and posterior pair of striate lobes lateral to vaginal opening. Tergum X bearing paired posterolateral appendages, varying in shape, not extending 1/2 length beyond posterior margin of tergum; posteromesal portion of tergite membranous or semisclerotized. Sternum X mostly membranous except for bases of dorsal appendages; semisclerotized patches and short fine setae may be present lateral to anal opening. Vaginal apparatus complex ( Figs. 18A View FIGURE 18 , 20A View FIGURE 20 ); posterior end of spermatheca sclerotized as a sphere, with posterior invagination where spermathecal duct enters ( Figs. 20A View FIGURE 20 , 22A View FIGURE 22 ).

Etymology. From histricis, Latin, meaning "porcupine", and verpa, Latin, meaning "penis," for the phallus of these species, the endotheca of which is covered with thornlike setae that resemble the quills of a porcupine.