Vietnamella Tshernova 1972
Creators: name: Luo, Yanping
name: Jiang, Jian
name: Wang, Lili
name: Shu, Zufei
name: Tong, Xiaoli
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Vietnamellidae
Vietnamella

description: Key to known larvae of Vietnamella
(Excluding V. ornata which is known only from the subimago)
1. Outer pair of cephalic projections with serration............................................................. 2
- Outer pair of cephalic projections smooth without serration.................................................... 3
2 Length ratio from basal to apical segments of maxillary palp = 1:0.9:0.7; pairs of projections on posterior margins of abdominal tergites I–X....................................................................... Vietnamella sp. A [India]
- Length ratio from basal to apical segments of maxillary palp = 1.3:1:1.1; pairs of projections on posterior margins of abdominal tergites II–VI and VIII–X, tergite VII with a single projection............................ Vietnamella sp. B [Thailand]
3 Body, especially legs usually with mottled color pattern....................................................... 4
- Body and legs usually unicolor.......................................................................... 6
4 Length ratio of outer cephalic projection to the inner about 2:1; length ratio from basal to apical segments of maxillary palp =1:1.3:1; pairs of projections on posterior margins of abdominal tergites I–VI and VIII–X, tergite VII with only a single posterior projection.................................................................... V. chebalingensis sp. nov.
- Length ratio of outer cephalic projection to the inner at least 3:1; pairs of projections on posterior margins of abdominal tergites I–X................................................................................................ 5
5 Length ratio from basal to apical segments of maxillary palp =1:1.3:1; transverse ridge of fore femur with spatulate setae............................................................................................... V. nanensis
- Length ratio from basal to apical segments of maxillary palp =1.3:1.2:1; transverse ridge of fore femur with small rounded setae...................................................................................... V. maculosa
6 Length of basal segment of maxillary palp nearly equal to length of the second segment, posterior margin of tergite X with a pair of weakly developed projections................................................................ V. thani
- Length of basal segment of maxillary palp shorter than length of the second segment, posterior margin of tergite X with a pair of apparent pointed projections.................................................................. V. sinensis
description: Published as part of Luo, Yanping, Jiang, Jian, Wang, Lili, Shu, Zufei & Tong, Xiaoli, 2020, Vietnamella chebalingensis, a new species of the family Vietnamellidae (Ephemeroptera) from China based on morphological and molecular data, pp. 208-220 in Zootaxa 4868 (2) on pages 215-216, DOI: 10.11646/zootaxa.4868.2.2, http://zenodo.org/record/4417564