Neofilchneria wanglanga Chen, 2019

Chen, Zhi-Teng, 2022, Comparative larval morphology of two stoneflies of Perlodidae (Insecta: Plecoptera), Zoologischer Anzeiger 299, pp. 115-127 : 116-119

publication ID	https://doi.org/ 10.1016/j.jcz.2022.06.001
persistent identifier	https://treatment.plazi.org/id/976E1C25-FFBC-D17D-5277-B802FED70EB1
treatment provided by	Felipe
scientific name	Neofilchneria wanglanga Chen, 2019
status

Treatment

3.1. Neofilchneria wanglanga Chen, 2019 View in CoL

3.1.1. Material examined

2 males, 3 females, 5 larvae, 1 exuvia, Siguniang Mountain ( Fig. 1A and B View Fig ), Xiaojin County, Sichuan Province, China, 30.9975 ◦ N, 102.8633 ◦ E, 3350 m, 16.07.2021, Zhi-Teng Chen GoogleMaps ; 1 male, 1 female, Siguniang Mountain , Xiaojin County, Sichuan Province, China, 30.9975 ◦ N, 102.8633 ◦ E, 3350 m, 26.07.2020, Ze-Chuan Li, Jia-Heng Chen GoogleMaps ; 3 females, 1 larva, Wanglang National Nature Reserve , Pingwu County, Sichuan Province, China, 32.9096 ◦ N, 104.1556 ◦ E, 2600 m, 23.06.2021, Zhi-Teng Chen GoogleMaps ; 1 female, Siguniang Mountain , Xiaojin County, Sichuan Province, China, 30.9975 ◦ N, 102.8633 ◦ E, 3350 m, 15.07.2021, Zhi-Teng Chen GoogleMaps ; 1 male, Miyaluo Nature Reserve , Li County, Sichuan Province, China, 31.7545 ◦ N, 102.7235 ◦ E, 3068 m, 05.04.2021, Zhi-Teng Chen GoogleMaps .

3.1.2. Description of male larvae

Body length ca. 20 mm ( Fig. 2A View Fig ). Head background pigmentation pale ( Fig. 2B View Fig ). Frons mostly dark brown, with a pale M-line. Posterior area of M-line dark brown, with two pairs of pale spots lateral to the three ocelli ( Fig. 2B View Fig ). Ecdysial suture indistinct. Occiput covered with dense, dark, short setae, on anterolateral areas which medially interrupted by the median epicranial suture, posterolateral areas with sparse, shorter dark setae, laterally with two oval areas which with have fewer irregular rows of setae; the transverse occipital row of spines extending from below eye to near median epicranial suture, regular and near straight on dorsal aspect, medially with a small additional patch of long hairs ( Fig. 2B View Fig ). Compound eyes small, dark and glabrous; postocular fringe distinct. Submentum of labium rounded ( Fig. 2C View Fig ), with a concave anterior margin, lateral margins fringed with short pale spines; submental gills finger-shaped; glossae much shorter than paraglossae. Antennae pale brown and slender ( Fig. 2A, D–E View Fig ), subequal in length to the abdomen, each segment apically fringed with short setae, basal segments covered with additional dense dark setae.

Cardo of maxilla ventrally covered with flattened setae and stout spines except for a glabrous rounded area ( Fig. 3A and B View Fig ). Stipes elongated, ventrally covered with dense short spines mainly on outer margin ( Fig. 3A and B View Fig ), dorsally with both apically curved dark setae and stout spines ( Fig. 3C and D View Fig ). Galea finger-shaped and covered with sparse moderate setae mainly on anterior margin and dorsal surface, apex near glabrous except for several short setae ( Fig. 3A–D View Fig ). Lacinia bidentate, much longer than galea, submarginal row with ca. 8 continuous slender setae beginning at base of apical tooth, ending after the inner margin of subapical tooth; a thin marginal seta present adjacent to the inner margin of apical tooth; dorsal seta located below inner margin of subapical tooth; ca. 15 marginal setae widely spaced and initially long-stout, posterior ones mixed with thinner marginal setae and blending into dorsal surface setae; ca. 30 ventral surface setae closely located near posterior half of the inner lacinia margin; ca. 10 curved dorsal surface setae densely located near posterior 1 / 3 of the inner lacinia margin ( Fig. 3A–D View Fig ). Maxillary palp segments 2–3 with sparse, long, straight setae and stout apical spines. Mandible with five pointed apical teeth ( Fig. 4A–D View Fig ), the four longest teeth each with serrated inner margin; a huge hairbrush present posterior to the apical teeth; both ventral and dorsal surfaces of mandible with spine patches near the hairbrush ( Fig. 3A–D View Fig ); dorsal surface with flattened dark setae and moderate spines near the outer margin ( Fig. 3C and D View Fig ).

Pronotum subquadrate, much narrower than head, corners obtuse ( Fig. 5A View Fig ); background pigmentation pale, mostly covered with dark setae except the irregularly shaped glabrous areas which have clear borders; median line with long hairs; margins fringed with densely located, short to moderate spines. Meso- and metanota background pigmentation pale, with both dark setae and irregular glabrous areas ( Fig. 5A View Fig ); median line with long hairs. Wing pads short, indicating brachypterous male adults, pale brown, covered with dark setae, outer margins near straight and fringed with short spines, inner margins concave in forewing pads and arched in hind wing pads ( Fig. 5A View Fig ). Median area of each thoracic sternum covered with dark setae ( Fig. 5B View Fig ). Apex of mesosternal Y-stem connected to anterior corners of furcal pits ( Fig. 5B View Fig ). Coxae and trochanters covered with dark setae and fringed with moderate spines mainly on dorsal surfaces ( Fig. 6A–C View Fig ). Femora dorsally covered with dense dark setae except for a longitudinal glabrous stripe near outer margin ( Fig. 6A–C View Fig ), ventrally near glabrous except the anterior margins ( Fig. 6D–F View Fig ), posterior margins fringed with dense, long swimming hairs. Tibiae dorsally covered with dense dark setae on anterior half ( Fig. 6A–C View Fig ), anterior margin fringed with sparse, short spines, ventrally covered with dense dark setae and with several short spines ( Fig. 6D–F View Fig ), posterior margins with dense, long swimming hairs. Two stout tibial spurs present ( Fig. 6D–F View Fig ). Tarsal segments with short spines along inner margin, surface mostly covered with short setae except for a glabrous stripe along posterior margin ( Fig. 6A–F View Fig ). Claws sharp and glabrous.

Abdominal segments divided into terga and sterna at the first three segments by membranous pleura, covered with dense dark setae on both dorsal and ventral aspects ( Fig. 7A and B View Fig ), each segment covered and fringed with conical spines along posterior margin; median line of terga 1–6 with long silky hairs ( Fig. 7A View Fig ); terga 1–9 each with a transverse row of small glabrous pits ( Fig. 7A View Fig ). Tergum 10 with a pale anteromedial area and covered with long conical spines, posterior margin rounded ( Fig. 7A View Fig ). A rounded process presents posterior to tergum 10, which with sclerotized lateral areas and a membranous median area ( Fig. 7A View Fig ). Paraproct sclerites subtriangular and covered with conical spines ( Fig. 7B View Fig ). Cerci pale ( Fig. 7C and D View Fig ), subequal in length to the abdomen, dorsally with long swimming hairs, most segments with sparse short spines on dorsal aspects, each segment apically fringed with long conical spines, length of which does not exceed the segment length.

3.1.3. Description of female larvae

Body length ca. 25 mm ( Fig. 8A View Fig ). Color pattern, chaetotaxy, and structure of head ( Fig. 8B and C View Fig ), thorax ( Fig. 8D and E View Fig ), abdomen ( Fig. 9A and B View Fig ), and appendages almost identical to those of the male larvae. Abdominal terga 1–10 with long silky hairs along the median line ( Fig. 9A View Fig ); tergum 10 with a pale median area and covered with several short spines on median area, posterior margin subtriangular ( Fig. 9A View Fig ); sterna 1–8 with glabrous anteromedial and posteromedial areas ( Fig. 9B View Fig ); posterior margin of sternum 8 slightly produced, with a shallow notch ( Fig. 9B View Fig ). Paraproct sclerites long triangular and covered with long conical spines ( Fig. 9B View Fig ).