Callibaetis pollens Needham and Murphy, 1924 Domínguez et al., 2006 , p. 116 Callibaetis Eaton (Ephemeroptera: Baetidae) from Brazil Cruz, Paulo Vilela Salles, Frederico Falcão Hamada, Neusa Journal of Natural History 2013 J. Nat. Hist. 2014-01-20 48 11 - 12 591 660 PM98 Needham and Murphy Needham and Murphy 1924 [390,856,893,918] Insecta Baetidae Callibaetis Animalia Ephemeroptera 56 646 Arthropoda species pollens  ( Figure 25)     Callibaetis pollens Needham and Murphy, 1924;  Domínguez et al., 2006, p. 116; Nieto, 2008. Known stages: I ♀ ♂, N    Diagnosis  Male imago.(1) Dorsal portion of turbinate eyes oval; (2) forewings hyaline (fig. 37 in Nieto 2008); (3) marginal intercalary veins single (fig. 37 in Nieto 2008); (4) hind wing hyaline; (5) costal process of hind wing compound (fig. 38a in Nieto 2008); (6) abdominal sterna with black mark anterolaterally; (7) forceps segment I wide at base, with setae on inner margin, segment III elongate (fig. 39 in Nieto 2008).  Female imago.(1) Forewings hyaline ( Figure 25B); (2) marginal intercalary veins single ( Figure 25B); (3) hind wing hyaline; (4) costal process of hind wing compound ( Figure 25C); (5) abdominal sterna II to IX with black mark anterolaterally ( Figure 25D); (6) abdominal terga reddish brown ( Figure 25A).  Mature nymph.(1) Distal margin of labrum with deep medial emargination, distal margin, medially with row of long and bifid setae (fig. 43a in Nieto 2008); (2) maxillary palp 1.5 × length of galea-lacinia (fig. 47 in Nieto 2008); (3) glossa shorter than paraglossa (fig. 48a in Nieto 2008); (4) segment III of labial palp truncate at apex (fig. 48 in Nieto 2008); (5) mid and hind tarsal claws with two rows of minute denticles (figs. 49, 51 in Nieto 2008); (6) cerci with spines on all segments (fig. 54 in Nieto 2008); (7) terminal filament with spines on all segments.    Comments The imagos of  C. pollenscan be easily distinguished from other species in the genus by the forewings hyaline with single marginal intercalary veins; the nymphs can be distinguished from other species in the genus by the mid and hind tarsal claws with two rows of minute spines; labrum with bifid setae medially and posterior margin of metanotum with pointed spines.    Material examined   Twofemale imagos, ARGENTINA, Acheral, Tucumán, Aranillas River, cruce RP  38, 366 m, ( 27 ◦06 ′59.9 ′′S, 65 ◦27 ′43.9 ′′W),  13 /ix /2007, Nietoand Molinericol. ( CZNC); five nymphs, ARGENTINA, Acheral, Tucumán, Aranillas River, cruce RP  38, 366 m, ( 27 ◦06 ′59.9 ′′S, 65 ◦27 ′43.9 ′′W),  28 /vii /2006, Nietoand Molinericol. ( CZNC); one femaleimago, one maleimago, eight nymphs, BRAZIL, Lajeado River, BR010, under the brigde, Maranhão, ( 06 ◦04 ′15.6 ′′S, 47 ◦22 ′56.6 ′′W),  21 /vii /2010, N. Hamada, P. V.  Cruzand R. Boldrinicol ( INPA); two maleimagos, five nymphs, BRAZIL, Maranhão, Riachão, Riacho Cocal, Cachoeira Santa Bárbara, ( 07 ◦13 ′46.2 ′′S, 46 ◦27 ′24.6 ′′W),  23 /vii /2010, N. Hamada, P. V.  Cruzand R. Boldrinicol ( INPA); two femaleimagos, BRAZIL, Maranhão, Farinha River, BR010, under the brigde, ( 06 ◦31 ′47.3 S, 47 ◦28 ′11.4 ′′W),  22 /vii /2010, N. Hamada, P. V.  Cruzand R. Boldrinicol ( INPA); five maleimagos, seven femaleimagos, twelve nymphs, BRAZIL, Ceará, Jaburu River, Ubajara, Distrito da Cachoeira do Boi Morto, ( 03 ◦52 ′36.2 ′′S, 41 ◦0.1 ′0.08 ′′W),  26 /vii /2010, N. Hamada, P. V.  Cruzand R. Boldrinicol ( INPA); four nymphs, BRAZIL, Brejinho, near Posto Cachoeira, Bahia, Correntina, ( 13 ◦43 ′53.5 ′′S, 45 ◦23 ′38.1 ′′W),  08 /viii /2010, N. Hamada, Ranise and R. Boldrinicol ( INPA); eight nymphs, BRAZIL, Bahia, Côcos, Formoso River, highway to Mambaí county, ( 14 ◦40 ′00.6 ′′S, 45 ◦49 ′32.3 ′′W),  11 /viii /2010, N. Hamada, Raniseand R. Boldrinicol ( INPA).    Distribution   Argentinaand Brazil: Mato Grosso do Sul state, Corumbá county;  Maranhão state, Lajeado River, Riachão county, Farinha River;  Ceará state, Ubajara county;  Bahia state, Correntina county, Côcos county. 2006-07-28 2007-09-13 2006-07-28 CZNC Nieto & Molineri & Acheral Argentina Two 38366 -27.11664 Aranillas River 1 -65.46219 Acheral 57 647 BR010 2 1 1 Tucuman 2010-07-21 V N. Hamada Argentina 58 648 -6.071 Maranhao 1 -47.382385 57 647 1 Maranhao 2010-07-23 R, INPA, V Cruz & Boldrini & N. Hamada Brazil Riachao -7.2295 Cachoeira Santa Barbara 1 -46.456833 Riacho Cocal 58 648 1 1 Maranhao R, INPA Cruz & Boldrini Brazil Farinha River 58 648 BR010 1 1 Maranhao 2010-07-22 V Hamada Brazil -6.529805 1 -47.469833 58 648 1 Maranhao 2010-07-26 R, INPA, V Cruz & Boldrini & N. Hamada Brazil Jaburu River -3.8767223 Distrito da Cachoeira do Boi Morto Ubajara 58 648 2 1 1 Ceara 2010-08-08 2010-08-11 2010-08-08 R, INPA Boldrini & N. Hamada & Ranise Brazil Cruz -14.666834 Posto Cachoeira 1 -45.825638 Brejinho 58 648 1 Bahia [143,905,716,741] Argentina Corumba county 58 648 1 Mato Grosso do Sul Brazil Lajeado River Farinha River Riachao county 58 648 1 Maranhao [695,1024,748,773] Brazil Ubajara county 58 648 1 Ceara Brazil Cocos county Correntina county 58 648 1 Bahia