Callibaetis (Callibaetis) zonalis Navas 1915
Creators: name: Cruz, Paulo Vilela
name: Salles, Frederico Falcão
name: Hamada, Neusa
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Baetidae
Callibaetis
Callibaetis zonalis

description: Callibaetis (Callibaetis) zonalis Navás 1915
(Figs. 22 A–22E)
Callibaetis zonalis Navás 1915a: 13; Gillies 1990: 31; Domínguez et al. 2006: 117; Cruz et al. 2014: 63. Callibaetis vitreus Navás 1915b: 121 (syn. by Gillies 1990)
Callibaetis vitreus Navás, 1919: 81 (syn. with C. vitreus Navás 1915 by Hubbard & Edmunds 1977; note that this is a hom. syn.)
Baetis opacus Navás 1915a: 12. (syn. by Gillies 1990)
Callibaetis sobrius Navás 1916: 61. (syn. by Gillies 1990)
Baetis virellus Navás 1915b: 119. (syn. by Gillies 1990)
Callibaetis apertus Navás 1917: 190. (syn. by Gillies 1990)
Callibaetis depressus Navás 1922: 59. (syn. by Gillies 1990)
Callibaetis amoenus Navás 1930c: 131. (syn. by Gillies 1990)
Callibaetis fluminensis Cruz, Salles & Hamada 2009 syn. nov.
Known stages. I ♀♂, N
Diagnosis. Male imago: 1) dorsal portion of turbinate eyes oval (Fig. 1 in Cruz et al. 2009); 2) dorsal portion of turbinate eyes in lateral view with constriction; 3) dorsal portion of turbinate eyes stalk height 2.6 × height of dorsal portion; 4) turbinate portion of compound eyes (in lateral view) with anterior and posterior margins divergent; 5) forewing with brownish stigmatic area and small brownish spots along costal vein (Fig. 3 in Cruz et al. 2009); 6) marginal intercalary veins paired (Fig. 3 in Cruz et al. 2009); 7) hind wing hyaline (Fig. 4 A in Cruz et al. 2009); 8) costal process of hind wing rounded (Fig. 4 B in Cruz et al. 2009); 9) marginal intercalary veins on hind wing absent (Fig. 4 B in Cruz et al. 2009); 10) abdominal terga III, V and VII laterally with inverted V mark; 11) abdominal sterna covered with spots and with pair of medioanterior and medioposterior sigilla weak pigmented; 12) forceps segment I wide at base (Fig. 5 in Cruz et al. 2009); 13) forceps segment III oval (Fig. 5 in Cruz et al. 2009).
Female imago: 1) forewing with C and Sc areas pigmented overlapping R1, after R2 with lighter pigmentation (Fig. 7 in Cruz et al. 2009); 2) marginal intercalary veins paired (Fig. 7 in Cruz et al. 2009); 3) hind wing with brown mark near costar process (Fig. 8 A in Cruz et al. 2009); 4) costal process of hind wing rounded (Fig. 8 B in Cruz et al. 2009); 5) marginal intercalary veins on hind wing absent (Fig. 8 B in Cruz et al. 2009); 6) abdominal terga III, V and VII laterally with inverted V mark (Fig. 6 in Cruz et al. 2009); 7) abdominal sterna covered by spots (Fig. 9 in Cruz et al. 2009); 8) abdominal terga with medial longitudinal mark (Figs. 22 B–22D); 9) abdominal sterna medially, on anterior margin, without one large spot.
Mature nymph: 1) maxillary palp 1.3 × the length of galea-lacinia (Fig. 15 in Cruz et al. 2009); 2) below maxillary palp insertion on outer margin with tuft of robust spine-like setae (Fig. 15 in Cruz et al. 2009); 3) paraglossa with row of spine-like setae on ventral surface (Fig. 16 A in Cruz et al. 2009); 4) segment III of labial apically rounded (Fig. 16 A in Cruz et al. 2009); 5) metanotum without spines; 6) foretarsus anterior surface without spine-like setae (Fig. 17 A in Cruz et al. 2009); 7) hind claw denticles smaller than foreclaw denticles (Fig. 18 E in Cruz et al. 2009).
Comments. After analyzing the types, it is clear that the pigmentation pattern and morphology of C. (C.) fluminensis are identical to those of C. (C.) zonalis. Both species possess forewings with C and Sc areas pigmented overlapping R1, after R2 with lighter pigmentation (Fig. 7 in Cruz et al. 2009); marginal intercalary veins paired (Fig. 7 in Cruz et al. 2009); costal processes of hind wings rounded (Fig. 8 B in Cruz et al. 2009); marginal intercalary veins on hind wings absent (Fig. 8 B in Cruz et al. 2009); abdominal terga III, V and VII laterally with inverted V marks (Figs. 22 C–22E and Fig. 6 in Cruz et al. 2009); abdominal sterna covered by spots (Figs. 22 C– 22E and Fig. 9 in Cruz et al. 2009); abdominal terga with medial longitudinal marks (Figs. 22 B–22D); 9) abdominal sterna medially, on anterior margin, without one large spot. Thereby, C. (C.) fluminensis is considered a junior synonym of C. (C.) zonalis.
The specimen studied by Navás (1915) from La Plata, Argentina, is damaged, and we analyzed it only through photographs. Further studies are necessary to determinate if the specimen should be designated as lectotype or if a neotype should be designated.
Material examined. Callibaetis apertus, female subimago (type), ARGENTINA, Prov. Buenos Aires, 4.x.1915, C. Bruch coll., MZB; Callibaetis vitreus, male subimago (type) ARGENTINA, La Plata, 12.iv.1915, MZB; Callibaetis depressus, female subimago (type), ARGENTINA, Santiago del Esterno, 1920, MZB; Callibaetis zonalis, photograph of female imago (type), ARGENTINA, La Plata, iii.1913, C. Bruch coll., MZLP; one female imago, BRAZIL, São Paulo, i.1926, MZB; one female imago, ARGENTINA, Buenos Aires, 6.x.1915, C. Bruch coll., MZB; Callibaetis fluminensis, female imago (holotype), one nymph and one male imago (paratypes), BRAZIL, Rio de Janeiro state, Nova Friburgo Municipality, Lumiar, 22°23’ 27.2” S / 42° 20’ 03.6” W, 3rd order tributary of the Rio Bonito, pool, v.2008, M.R. Souza coll., INPA.
Distribution. Argentina: Buenos Aires; La Plata; Santiago del Esterno. Brazil: São Paulo; Rio de Janeiro. Paraguay: Rio Paraguay. Uruguay: Maldonado.
description: Published as part of Cruz, Paulo Vilela, Salles, Frederico Falcão & Hamada, Neusa, 2017, Additions and corrections to the systematics of mayfly species assigned to the genus Callibaetis Eaton 1881 (Ephemeroptera: Baetidae) from South America, pp. 500-534 in Zootaxa 4231 (4) on pages 529-532, DOI: 10.11646/zootaxa.4231.4.2, http://zenodo.org/record/292674