Leptonema boliviense boliviense Mosely

Rueda Martín, Paola A. & Miranda, Águeda Verónica Isa, 2015, Association of immature stages of some caddisfly species from northwestern Argentina with description of a new species of Helicopsyche (Trichoptera: Helicopsychidae), Zootaxa 3949 (2), pp. 203-216 : 211-214

publication ID

https://doi.org/ 10.11646/zootaxa.3949.2.3

publication LSID

lsid:zoobank.org:pub:43D9AF95-21AA-4C56-B2DE-41D91F27D7AB

DOI

https://doi.org/10.5281/zenodo.6106645

persistent identifier

https://treatment.plazi.org/id/03A487B6-8253-FFC8-FF44-FCA2FEE2FBEE

treatment provided by

Plazi

scientific name

Leptonema boliviense boliviense Mosely
status

 

Leptonema boliviense boliviense Mosely View in CoL

(Figs. 7–8)

Leptonema boliviense boliviense Mosely 1933: 36 View in CoL [original description]. Flint et al. 1987: 47 [male redescription, distribution].

This subspecies belongs to the L. stigmosum View in CoL Group. The male of L. boliviense boliviense View in CoL is recognizable by characters of the male genitalia: The shapes of the dorsal excision of tergum X, the two lateral lobes, and the two pairs of dorsal setal warts. The basal segment of each inferior appendage is slightly wider in the mesal area. The phallic apparatus bears an apical setose lobe, a pair of dorsolateral processes directed posterad and a pair of ventrolateral processes directed anterad, both with apical setae. Leptonema boliviense boliviense View in CoL is close to the subspecies L. b. plumosum from which it can be differentiated by structures of the phallic apparatus.

Several Neotropical Leptonema View in CoL species had been associated with their immature stages: L. albovirens ( Walker 1852) ( Flint 1968) View in CoL ; L. archboldi Flint 1968 ( Flint 1968) View in CoL , L. eugnathum ( Müller 1921) ( Ulmer 1957) View in CoL , L. columbianum Ulmer 1905 ( Flint & Wallace 1980) View in CoL , L. insulanum Banks 1924 ( Flint 1964) View in CoL , L. poeyi Banks 1938 ( Botosaneanu 1994) View in CoL and L. tridens Mosely 1933 ( Nessimian & Dumas 2010) View in CoL .

The descriptions of larvae of L. poeyi View in CoL , L. alborivens , L. archboldi View in CoL , and L. eugnathum View in CoL are rather incomplete, so that only a few larval characters can be compared. The larva of L. boliviense boliviense View in CoL is the second largest larva of Leptonema View in CoL described at the moment, with 29 mm ( L. tridens View in CoL = 31–40mm). The shape of the head of L. boliviense boliviense View in CoL is similar that of L. columbianum View in CoL , in dorsal view; L. columbianum View in CoL is more setose in the labrum and in the anterior area of the head. In L. insulanum View in CoL the head is long and more nearly rectangular in dorsal view and in L. tridens View in CoL , the head, in lateral view is sharply narrowed anteriorly whereas in L. boliviense boliviense View in CoL it is gradually narrowed from the posterior to the anterior area. The mandibles are asymmetrical, but in L. columbianum View in CoL , L insulanum View in CoL , and L. tridens View in CoL the teeth are more prominent and sharper whereas in L. boliviense boliviense View in CoL the teeth are blunt and the mandibles are shorter and widener. The shape of the mesonotal plates in dorsal view is different: L. boliviense boliviense View in CoL shows posterolateral margins broad and extended and the coloration in the posterior area is discontinuous mesally whereas L. columbianum View in CoL and L. tridens View in CoL have a dark sclerotized area making a complete curve posteriorly. The metanotum in L. boliviense boliviense View in CoL has its posterior margin stronger and darker. The prosternal sclerite is broad in L. boliviense boliviense View in CoL , similar to that of L. tridens View in CoL and L. columbianun . The thoracic legs of L. boliviense boliviense View in CoL have fewer and shorter setae than those of L. columbianum View in CoL . The forefemur of L. boliviense boliviense View in CoL is broader than in L. columbianum View in CoL and L. tridens View in CoL , but the forefemur of L. insulanum View in CoL is even broader than the others. Abdominal gills in L. boliviense boliviense View in CoL have a central axis surrounded by regular digitate projections, in L. columbianum View in CoL and in most species of Leptonema View in CoL , the shape is the same but in L. tridens View in CoL the gills are rather irregular. The sclerites of abdominal sternum IX are triangular in L. boliviense boliviense View in CoL , but in L. columbianum View in CoL and L. tridens View in CoL the sclerites have rounded angles. Pupal characters are different, too. The mandibles of L. boliviense boliviense View in CoL are sharper, longer and with smaller teeth than in L. columbianum View in CoL ; in L tridens View in CoL , the pupal mandibles are asymmetrical. The hook plates are distributed on the same segments in L. columbianum View in CoL and L. boliviense View in CoL , but the shape of each plate is different. Leptonema tridens View in CoL has a pair of dorsal hook plates on abdominal segment II that are absent in other species, however the shape of the rest of the dorsal plates are very similar those of L. boliviense boliviense View in CoL . The terminal segment of the L. boliviense boliviense View in CoL pupa is less setose than that of L. columbianum View in CoL .

FIGURE. 7. Leptonema boliviense boliviense Mosely 1933: 7 View in CoL A–B, adult male: 7A, genitalia, left lateral; 7B, phallic apparatus, left lateral. 7C–L, larva: 7C, habitus of larva; 7D, head, dorsal; 7E, pronotum, dorsal; 7F, mesonotum, dorsal; 7G, metanotum, dorsal; 7H, labrum, dorsal; 7I, mandibles, ventral; 7J, thoracic legs; 7K, prosternal plate; 7L, ventral plates of abdominal segment IX. ix=segment IX; x=tergum X; ai=inferior appendages; pdl=dorsolateral process; pvl=ventrolateral process.

Adult. Mean length of each forewing: 17 mm ( Flint et al. 1987). General coloration yellowish without scales on wings and body.

Male genitalia (Fig. 7). Segment IX annular, dorsally broader and with medial carina (Fig. 7A:ix). Tergum X with mesal excision U–shaped in dorsal view; lateral lobe bilobed with two dorsal setal warts (Fig. 7A: x). Inferior appendages long and slender, with basal segment broader near middle; apical segment 1/3 as long as basal segment, curved to midline. Phallic apparatus tubular with membranous apical lobe directed posterad and bearing setae; dorsolateral process of phallic apparatus short, directed posterad with short apical setae (Fig. 7B: pdl); ventrolateral process of phallic apparatus short, directed posterad and bearing short apical setae (Fig. 7B: pvl).

5th instar larva (Fig. 7–8). Mean total length: 29 mm (27–30, n=15). General color brown. Head dark brown, clear around stemmata (Fig. 7C); head almost square posteriorly in dorsal view, nearly round on anterior margin; anterolateral area of head bearing short modified yellowish setae with truncate apices, parietal sclerites each with dorsal longitudinal line of short, strong, gold setae (Fig. 7D). Ventrolateral regions of head with pair of areas with transverse stridulatory lines. Labrum with brush of long, curved, yellowish setae on anterolateral margin; mesal anterior margin of labrum with short setae (Fig. 7H). Mandibles asymmetrical, right mandible with concave area bearing yellowish setae; left mandible with lateral margin strongly sclerotized and with three mesal teeth (Fig. 7I).

Pronotum dark brown with short and truncate setae on anterior margin; posterior margin of pronotum black, strongly sclerotized; each pronotal plate bearing semicircular groove and two small dark spots (Fig. 7E). Mesonotum and metanotum with curved setae in anterior margins; surfaces recovered with dark setae; muscle scar patterns as in Figs 7 F–G. Prosternum irregular, subtriangular, broader anteriorly with short, broad anteromesal projection; posteriorly rounded, coloration pattern as in Fig. 7K. Chaetotaxy of thoracic legs as in Fig. 7J. Forefemur wider in distal 2/3rds, with pointed dorsal process probably associated with stridulation function. Abdomen with pattern of abdominal gills as in Fig. 8 View FIGURE 8 A, lateral line vague. Segment IX with pair of ventral subtriangular plates bearing posterior setae (Fig. 7L). Anal prolegs each with brush of long setae on posterior margin of each lateral plate.

Pupa ( Fig. 8 View FIGURE 8 ). Mean body length: 14 mm (n=3). General color in alcohol yellowish. Mandibles each 2.5 times as long as basal width, curved, pointed, bearing serrated internal margins ( Fig. 8 View FIGURE 8 B). Abdominal tergites III–VIII bearing anterior dorsal hook plates; abdominal tergite III bearing also posterior pair of hook plates ( Fig. 8 View FIGURE 8 C). Terminal segment elongate with two digitate projections bearing lateral setae ( Fig. 8 View FIGURE 8 D).

Biology. Larvae of L. boliviense boliviense were collected in rivers with much marginal vegetation. These rivers and springs have stony bottoms and abundant allochthonous organic debris from the riparian vegetation. The larva builds a retreat, with sand and bigger stone pieces between stones in small waterfall areas. In the stomachs of some larvae we found coarse particulate organic matter, mainly pieces of leaves. The second most commonly found items were algae and some arthropod sclerites.

Distribution. Argentina, Bolivia, Peru.

Material examined. ARGENTINA: Jujuy: Camino a Tiraxi, Arroyo Hondo Bajo Puente, 2400’25”S, 06522’9 W, 1700 m, Romero & Molineri cols, 2 larvae (IBN); Río Yala, 20.vi.2009, 7 larvae (IBN); Salta: Santa Victoria, Río Los Naranjos, 2225’47’’S, 06444’20"W, 1109 m, 13.xi.2004, P. Rueda Martín col., 5 larvae, 1 pupa, 20 males (IBN); Los Toldos, Río Huaico Grande, 2216’44’’S, 06442’39’’W, 1645 m ,, 26.x.1999, 3 males (IBN); Río Huaico Grande, 2216’44’’S, 06442’39’’W, 1645 m, 11.xi.2004, P. Rueda Martín col., 3 pupae, 2 metamorphotype males (IBN); Tucumán: Afluente Río Raco, Manantial, 3.iii. 2009,1 larva, 1 metamorphotype male (IBN); Arroyo Calimayo, antes de la papelera, 265533”S, 0652319”W, 493 m, 28.vii.2006, Rueda Martín col., 6 larvae (IBN).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Trichoptera

Family

Hydropsychidae

Genus

Leptonema

Loc

Leptonema boliviense boliviense Mosely

Rueda Martín, Paola A. & Miranda, Águeda Verónica Isa 2015
2015
Loc

Leptonema boliviense boliviense

Flint 1987: 47
Mosely 1933: 36
1933
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