Labiobaetis Novikova & Kluge 1987

Kluge, Nikita J. & Novikova, Eugenia A., 2016, New tribe Labiobaetini tribus n., redefinition of Pseudopannota Waltz & McCafferty 1987 and descriptions of new and little known species from Zambia and Uganda, Zootaxa 4169 (1), pp. 1-43 : 32-33

Genus Labiobaetis Novikova & Kluge 1987

( Figs 1 , 4, 5 , 8 , 16 , 113–141)

Labiobaetis Novikova & Kluge 1987: 13 .

= Mullerbaetis Kang et al. 1994: 32 .

= Cymulabaetis McCafferty & Waltz 1995: 25 . Pseudocloeon: Lugo-Ortiz, McCafferty & Waltz 1999: 3 (non Klapalek 1905). Type species: Baetis atrebatinus Eaton 1870 .

Hierarchical name: Labiobaetis /f2=g1.

Characteristics. This is a plesiomorphon within Labiobaetini, that means that it has all characters of Labiobaetini (see above), but has no apomorphies of Pseudopannota (see above). Discussion about characters of Labiobaetis is given in our previous paper ( Kluge & Novikova 2014). Most characteristic larval features of Labiobaetis are widened paraglossae, diminished glossae and expanded median projection of 2nd segment of labial palp ( Figs 126, 127 ).

Composition. About 75 formally described species and many undescribed species.

Species examined. Imagoes, subimagoes and larvae associated by rearing were examined for L. atrebatinus ( Eaton 1870 [ Baetis ]), L. calcaratus ( Keffermüller 1972 [ Baetis ]), L. desertus ( Novikova & Kluge 1987 [ Baetis (Labiobaetis) ]), L. geminatus ( Müller-Liebenau & Hubbard 1985 [ Baetis ]), L. ordinatus ( Müller-Liebenau & Hubbard 1985 [ Baetis ]), L. propinguus ( Walsh 1863 [ Cloe ]), L. pulchellus ( Müller-Liebenau & Hubbard 1985 [ Baetis ]), L. tenuicrinitus (Kopelke 1980 [ Pseudocloeon ]) (see below), L. tricolor ( Tshernova 1928 [ Baetis ]), 7 undetermined species from Uganda, 3 undetermined species from India, 1 undetermined species from Java, 6 undetermined species from Sulawesi, 4 undetermined species from Papua.

Besides this, genitals extracted from mature larvae were examined for L. glaucus ( Agnew 1961 [ Baetis ]), L. involutum (Lugo-Ortiz & McCafferty (in Lugo-Ortiz et al.) 1999 [ Pseudocloeon ]), L. mustus ( Kang & Yang 1996 [ Baetis (Labiobaetis) ]), L. vultuosum (Lugo-Ortiz & McCafferty (in Lugo-Ortiz et al. 1999) [ Pseudocloeon ]), and several undetermined species from Afrotropical and Oriental Regions.

Distribution. Arctogea (Holarctic, Afrotropical and Oriental regions).

Figures

FIGURES 1 – 3. Labiobaetini, genitals of male imago, ventral view. 1, Labiobaetis tenuicrinitus (Kopelke 1980) (pair of median paraproctal muscles are visible through integument); 2, Pseudopannota pannota sp. n. (median paraproctal muscles removed, only their extreme bases retained); 3, Pseudopannota camerunense (Ulmer 1920) (median paraproctal muscles removed, only their proximal parts retained). Abbreviations: mIX-X, median paraproctal muscles (i. e. muscles going from sternum IX to common base of paraprocts)

FIGURES 4 – 7. Labiobaetini, apex of right mandible. 4, Labiobaetis tenuicrinitus (Kopelke 1980); 5, Labiobaetis atrebatinus (Eaton 1870); 6, Pseudopannota maculosa (Crass 1947); 7, Pseudopannota pannota sp. n. Abbreviations: in, incisor; kd, kinetodontium; prs, prostheca.

FIGURES 8 – 15. Labiobaetini, maxillary palp. 8, ultimolarval exuviae of Labiobaetis tenuicrinitus (Kopelke 1980); 9, ultimolarva of Pseudopannota fusca sp. n.; 10, its exuviae; 11 – 13, Pseudopannota camerunense (Ulmer 1920): 11, penultimolarva; 12, penultimolarval exuviae; 13, ultimolarval exuviae; 14, ultimolarval exuviae of Pseudopannota pannota sp. n.; 15, ultimolarval exuviae of Pseudopannota sp. U. Abbreviations: 1, 2, primary first and second segments of maxillary palp; 1 d, 1 p, distal and proximal subsegments of primary first segment.

FIGURES 16 – 20. Labiobaetini: fore protoptera of immature ultimolarvae (hypoderm with veins visible through cuticle). 16, Labiobaetis tenuicrinitus (Kopelke 1980); 17, Pseudopannota pannota sp. n.; 18, Pseudopannota camerunense (Ulmer 1920); 19, Pseudopannota maculosa (Crass 1947); 20, Pseudopannota fusca sp. n.

FIGURES 126 – 129. Labiobaetis tenuicrinitus, larva. 126, labium, ventral view (at left half, muscles shown by interrupted lines); 127, glossae and paraglossae (at left half, ventral view; at right half, dorsal view); 128, margin of ultimolarval metanotum with vestige of hind protopteron; 129, paraproct.