Moribaetis latipennis, Kluge & Bernal Vega, 2018

Kluge, Nikita J. & Bernal Vega, Juan A., 2018, Redescription of the Central American genus Moribaetis Waltz & McCafferty 1985 (Ephemeroptera, Baetidae), Zootaxa 4521 (2), pp. 231-257 : 247-254

publication ID 10.11646/zootaxa.4521.2.5

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Moribaetis latipennis

sp. nov.

Moribaetis latipennis sp. n.

( Figs 62–101 View FIGURES 62–70 View FIGURES 71–76 View FIGURES 77–84 View FIGURES 85–88 View FIGURES 89–95 View FIGURES 96–101 )

Moribaetis maculipennis: Waltz & McCafferty 1985 View in CoL : fig. 32 (non figs 26–27) [non Baetis maculipennis Flowers 1979 ].

Moribaetis salvini: McCafferty & Lugo-Ortiz 1998: 247 View in CoL , figs 34–41 (larva, non imago); Lugo-Ortiz & McCafferty 1996: 369, figs 7, 9) (larva, non imago) [non Baetis salvini Eaton 1885 ].

? Moribaetis macaferti: McCafferty & Lugo-Ortiz 1998: 118 View in CoL , figs 1–8 (imago, non larva) [non Moribaetis macaferti Waltz View in CoL (in Waltz & McCafferty) 1985].

Etymology. The species name is connected with the fact that the fore wing is somewhat wider than in the related species.

Material examined. Holotype ( ZIN): L-S/I ♂ {specimen [XIX](4) 2018}, PANAMA, provincia de Coclé, El Valle de Anton, stream nearest to the top of the pass to La India Dormida , 3–4.II.2018, coll. N. Kluge. Paratypes: the same locality, time and collectors: 9 larvae ( ZIN) ; provincia de Chiriqui, La Esperanza, 7 km NNW Gualaca, quebrada Comaron (8°35'40''N, 82°20'02''W), 21.I.2018, coll. N. Kluge: 3 larvae ( ZIN) GoogleMaps ; provincia de Bocas del Toro, bosque protector Palo Seco, near Altos del Valle : 24–28.I.2018, N. Kluge & L. Sheyko: 2 larvae ( ZIN) ; reserva forestal Fortuna, quebrada Honda (8°45'2.15''N, 82°14'18.68''W), 11.XI.2017, coll. J. Bernal & T. Ríos: 10 larvae ( UNACHI) GoogleMaps ; Alambique, río Fonseca (8°22'1.46''N, 82°4'28.65''W), 7.XII.2016, coll. T. Ríos: 1 larva ( UNACHI) GoogleMaps .

Diagnosis. Larva. Described by Waltz & McCafferty (1985) as « M. salvini ».

(1) Head not elongated, frons relatively wide ( Figs 68–69 View FIGURES 62–70 ; Waltz & McCafferty 1985: fig. 4).

(2) Mandibles [with blade-like incisor and reduced kinetodontium – see Moribaetis (2)] retain massive left prostheca and well-distinguishable right kinetodontium. On left mandible kinetodontium is fused with incisor and is represented by 3 denticles at its base ( Fig. 80 View FIGURES 77–84 ); on right mandible kinetodontium is also very short in comparison with incisor, but distinctly projected, curved outward from incisor and terminated by 3 denticles ( Fig. 82 View FIGURES 77–84 ). Prostheca of left mandible retains usual structure, with 4 blunt denticles and 3 pointed denticles ( Fig. 80 View FIGURES 77–84 ); prostheca of right mandible as characterized above [see Moribaetis (3)] ( Fig. 82 View FIGURES 77–84 ). These features can be seen in larva just after moult; often mandibles are broken; in this case left mandible retains at least projected remnant of massive prostheca, and right mandible retains at least projected remnant of kinetodontium ( Figs 77–78 View FIGURES 77–84 ).

(3) Femur of fore leg widened proximally ( Fig. 89 View FIGURES 89–95 ); stout setae on its inner side short and truncate, occupy narrow area ( Fig. 95 View FIGURES 89–95 ).

(4) Dark brown submedian hypodermal stripes on abdominal tergum VI about twice wider than stripes on next terga VII and VIII; stripes on terga III–IV also widened ( Fig. 62 View FIGURES 62–70 ).

(5) Posterior margins of abdominal sterna I–VII smooth, without denticles; that of sterna VIII–IX with sparse pointed denticles [II–X terga with larger denticles – see Moribaetis (14)].

(6) Paraproct with denticles on inner and apical margins either subequal, or gradually enlarged toward apex of paraproct ( Waltz & McCafferty 1985: fig. 41).

(7) Larval cerci and their swimming setae with lighter and darker areas ( Figs 62–63 View FIGURES 62–70 ).

Male imago. Described by McCafferty & Lugo-Ortiz (1998) as « M. macaferti ». Differs from M. maculipennis and M. salvini by following characters.

(1) Turbinate eyes small and narrow, separated both in imago ( McCafferty & Lugo-Ortiz 1998: figs 1–2) and in subimago ( Figs 96–97 View FIGURES 96–101 ) (in contrast to wide and contiguous in M. maculipennis ).

(2) Fore wing wider than in other species; most cross veins light yellow, lighter than adjacent brown maculae (in contrast to brown in M. salvini ); brown maculae present all over wing ( Fig. 100 View FIGURES 96–101 ; McCafferty & Lugo-Ortiz 1998: fig. 4). Hind wing of holotype without maculae ( Fig. 99 View FIGURES 96–101 ).

(3) Dark brown submedian hypodermal stripes on abdominal tergum VI about twice wider than stripes on next terga VII and VIII ( Fig. 97 View FIGURES 96–101 ) (in contrast to M. maculipennis ).

(4) Femur with small contrasting brown spot on posterior side ( Fig. 96 View FIGURES 96–101 ) (in contrast to wide brown band in M. salvini – Fig. 102 View FIGURES 102–105 ).

Female and eggs. Unknown.

Dimensions. Fore wing length of holotype 7.2 mm; length of last instar larvae 7–11 mm.

Distribution. Mexico, Costa Rica, Panama.

Comparison. Larva of M. latipennis sp. n. can be reliably distinguished from M. maculipennis by shape of mandibular incisors, right kinetodontium and left prostheca, and by wide triangular hypodermal markings on abdominal tergum VI. It also differs from M. maculipennis by denticles on abdominal sterna and paraprocts.

Male larva of M. latipennis sp. n. differs from M. maculipennis by size of dorsal eyes, in accordance with the difference between these species in size of imaginal turbinate eyes (compare Fig. 68 View FIGURES 62–70 with Fig. 12 View FIGURES 1–15 of last instar larva; compare Fig. 69 View FIGURES 62–70 with Fig. 13 View FIGURES 1–15 of penultimate instar larva). At certain phase of development, last instar larva of M. latipennis sp. n. looks as having dorsal eyes as large as in M. maculipennis (compare Fig. 62 View FIGURES 62–70 with Fig. 1 View FIGURES 1–15 ); this happens when tissues of dorsal eyes are detached from cuticle and grow under larval cuticle before transformation to subimago ( Fig. 63 View FIGURES 62–70 ).

Male imago of M. latipennis sp. n. differs from M. maculipennis by smaller turbinate eyes, by wider fore wings and by wide triangular hypodermal markings on abdominal tergum VI.

Male imago of M. latipennis sp. n. differs from M. salvini by light yellow cross veins bordered by brown maculae all over the wing.

Recently, larvae similar to M. latipennis sp. n., were described from Costa Rica as Moribaetis brachiostrinus Romero & Esquivel 2018 . Judging by the original description, larva of M. brachiostrinus differs from M. latipennis sp. n. and M. maculipennis by shortened antennae and presence of a triangular projection on paraproct ( Romero & Esquivel 2018). Both in M. latipennis sp. n. and M. brachiostrinus tergalii vary from colorless ( Romero & Esquivel 2018: fig. 2) to more or less purple ( Fig. 62 View FIGURES 62–70 ; Romero & Esquivel 2018: fig. 3).

Comments. Both larva and imago of M. latipennis sp. n. were already described, but wrongly attributed to other species.

Larvae of M. latipennis sp. n. were ascribed to Moribaetis salvini by Waltz & McCafferty (1985). The species, originally described as Baetis salvini Eaton 1885 , is known as male imago (see below). Arguments to associate larvae with this species, were formulated as the following: «Larvae that appear to match the adult color pattern of M. salvini and that fit the classification scheme concordant with the relationship of M. salvini to that of M. maculipennis are described as M. salvini ...» ( Waltz & McCafferty 1985: 247). Then follows the description of the larva of « M. salvini », where the color pattern is characterized as «medial areas of terga with broken pigmented pattern similar to M. maculipennis ». It is unclear, which features of coloration allowed these authors to associate these larvae with M. salvini , but not with another species of Moribaetis .

Probably, the male imago, which was ascribed to Moribaetis macaferti by McCafferty & Lugo-Ortiz (1998), belongs to M. latipennis sp. n. The single imaginal specimen examined by them, agrees with M. latipennis by having narrow turbinate eyes and widened fore wings with characteristic maculation. It differs from other specimens of M. latipennis sp. n. only by absence of dark brown submedian stripes on abdominal terga, that can be a result of fixation. Association of this single male imago with larvae of M. macaferti was based only on the fact that they were collected in the same place in Mexico. In the Discussion, it is written that «subimago from Panama that was indeed reared from larvae of M. macaferti (R.W. Flowers, pers. comm.)» ( McCafferty & Lugo-Ortiz 1998: 119). Lugo Ortiz kindly examined specimens deposited in Purdue University; in the tube with male subimago and larval exuviae, besides the typed labels « PANAMA: Bocas del Toro Prov., trib. of Rio Guabo at pipeline rd. 1700' lt 28-V-1985 R.W.Flowers» and « Moribaetis macaferti Waltz det. R.W.Flowers 1988» he found a pencil-written original label, where is written «ASSOC? Bocas Queb ʘ 1700 28-V-85 » with the question mark. Probably, association of these male subimago and larval exuviae were not reliable, as well as the conclusion about their belonging to the same species as the male imago from Mexico.


Russian Academy of Sciences, Zoological Institute, Zoological Museum














Moribaetis latipennis

Kluge, Nikita J. & Bernal Vega, Juan A. 2018

Moribaetis salvini: McCafferty & Lugo-Ortiz 1998 : 247

McCafferty, W. P. & Lugo-Ortiz, C. R. 1998: 247
Lugo-Ortiz, C. R. & McCafferty, W. P. 1996: 369

Moribaetis macaferti:

McCafferty, W. P. & Lugo-Ortiz, C. R. 1998: 118
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