Hydromastodon sallesi Polegatto and Batista 2007, new species
Creators: name: Polegatto, C. M.
name: Batista, J. D.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Leptophlebiidae
Hydromastodon
Hydromastodon sallesi

description: Hydromastodon sallesi Polegatto and Batista, new species (Fig. 1 -21)   
 Mature nymph, male. In alcohol. Body length: ca. 6.7mm, without caudal filaments; head ca. 1.4mm.   
 Head (Fig. 2). Color pattern: head of male nymph light brown, upper portion of eyes orange-brown, lower portion black; in male, lower portion of eyes about 1/5 width of upper portion. Antennae 1,6 length of head. Labrum (Fig. 13): dorsal surface with fourteen to fifteen long setae; ventral surface with long setae in a oblique row decreasing posteriorly, and short setae on posterior area; posterior and lateral margin with short and relatively long setae respectively. Hypopharynx: as in Fig. 18. Left mandible (Fig. 21): incisors with three denticles, one prominent denticle and two smaller; prostheca with numerous long and fine setae, and two hard setae; mola with a prominent and hard posterior area. Right mandible (Fig. 19-20). Anterior incisor with three denticles, one of them prominent, posterior incisor with two subequal denticles; prostheca more slender than right, with long and fine setae. Maxillae (Fig. 16-17). Setae on crown of galeolaciniae numerous, and with setae on the base of tooth; setae on medial galealacinial margin fine and long in a single row, except on anterior region with two rows; all setae as in Fig. 13; third segment of maxillary palpi with long and fine setae in six parallel rows; apex of third segment bare and soft (Fig. 17). Labium (Fig. 14-15). Glossae and paraglossae with setae as in Fig. 14; labial palp: segment two with nine long dorsal setae, segment three with long setae concentrated ventrally, third segment with fifteen-sixteen short spine-like setae on inner margin (Fig. 15).   
 Thorax. Color pattern: thorax brown, legs light brown. Pronotum with weak anterolateral angle, with two setae. Legs (Fig. 7-10). Femora with long, strong and fine setae on posterior margin, and short setae on anterior margin; tibiae with long fine setae on anterior margin, scarce on third tibiae; long setae on all femora and on third tibiae, clavate apically (Fig. 10); short setae on median margin of tibiae and tarsi as in Figs. 7-9; tarsal claws (Fig. 6) with subequal denticles, three apical and five at middle point, in two separate rows.   
 Abdomen (Fig. 4). Color pattern: segments 1 to 5 pigmented of black, segments 6 to 10, with color pattern as in Fig. 4. Segments 6 to 9 with posterolateral spines. Gills (Fig. 11) with a minute fine apical projection.   
 Mature nymph, female. In alcohol. Color pattern: Head and abdomen of female nymph with pattern as in Figs. 3, 5; thorax with color similar to male; segments 1 to 5 pigmented of black as in male, but with small areas lighter; segments 6 to 10 similar of in males, as in Fig. 5.   
 Diagnosis: This species can be distinguished from Hydromastodon mikei (Thomas & Boutonnet, 2004), by the the following combination of characters: presence of posterolateral spines on abdominal segment 6 to 9; absence of spots in tibiae and tarsi; more numerous dorsal setae on labrum; prominent and hard posterior area of left mola; and color pattern of abdomen.   
 Adults: unknown.   
 Etymology: The name of species is in honour to my friend Frederico Falcão Salles, a great specialist in Ephemeroptera in Brazil.   
 Material examined: Holotype: mature nymph male, North of Brazil State of Roraima, Bem Querer Stream, 18-X-2004., Frederico F. Salles. Paratypes: 1 mature nymph female, same of holotype, 1 imature nymph male, West of Brazil, State of Mato Grosso, near to Nova Xavantina, Pindaíba Stream; II-2003; Joana D. Batista & Helena S. R. Cabette.   
The holotype and 1 paratype are deposited in the National Research Institute of Amazon, and 1 paratype is deposited in the Museum of Zoology of the University of São Paulo (MZSP), São Paulo.
description: Published as part of Polegatto, C. M. & Batista, J. D., 2007, Hydromastodon sallesi, new genus and new species of Atalophlebiinae (Insecta: Ephemeroptera: Leptophlebiidae) from West and North of Brazil, and notes on systematics of Hermanella group, pp. 53-60 in Zootaxa 1619 (1) on page 55, DOI: 10.11646/zootaxa.1619.1.3, http://zenodo.org/record/5103258