Apobaetis biancae, Cruz & Boldrini & Hamada, 2020

Cruz, Paulo Vilela, Boldrini, Rafael & Hamada, Neusa, 2020, Redescription of Apobaetis lakota McCafferty, 2000 (Ephemeroptera: Baetidae) and description of two new species from Brazil, Zootaxa 4885 (2), pp. 249-258: 252-254

publication ID

https://doi.org/10.11646/zootaxa.4885.2.6

publication LSID

lsid:zoobank.org:pub:1867609A-0C7B-4060-B33E-B4594D332B91

DOI

http://doi.org/10.5281/zenodo.4327927

persistent identifier

http://treatment.plazi.org/id/2B0C87B5-FF90-9E63-0BEE-FC5F9F9705C8

treatment provided by

Plazi

scientific name

Apobaetis biancae
status

sp. nov.

Apobaetis biancae   sp. nov. Boldrini

( Figs 2 View FIGURE 2 A–2J, 4A, 4B)

Apobaetis sp. nov. A in Boldrini & Cruz 2014: 4

Diagnosis. Larva. 1) labrum rectangular, distal margin without shallow medial emargination, medial area of distal margin with four robust pointed setae ( Fig. 2A View FIGURE 2 ); 2) maxillary palp long, more than 2.5× the length of galea-lacinia, segment I slightly longer than galea-lacinia ( Fig. 2D View FIGURE 2 ); 3) lingua subquadrate with one medial lobe ( Fig. 2E View FIGURE 2 ); 4) glossa distally rounded; 5) inner projection of labial palp segment II rounded, segment III triangular ( Fig. 2F View FIGURE 2 ); 6) tarsal claws 1.4× the length of tarsus, without row of denticles ( Fig. 2G View FIGURE 2 ); 7) posterior margin of tergum IV with triangular spines (longer than wide) ( Fig. 2H View FIGURE 2 ).

Description. Larva. Body: 4.0– 4.2 mm; cercus approximately 1.5 mm. Body whitish ( Fig. 4 View FIGURE 4 A–B). Head. Antenna with minute spines on the apex of each segment. Frontal keel absent. Labrum ( Fig. 2A View FIGURE 2 ): rectangular; distal margin without shallow medial emargination and medial lobe; distolateral area and distal margin with robust setae; medial area of distal margin with four robust setae on dorsal surface; ventral surface with one row of thin setae on medial area near distal margin. Left mandible ( Fig. 2B View FIGURE 2 ): outer and inner sets of incisors with 5 and 3 denticles, respectively; prostheca robust, bifid at apex, inner margin frayed at middle; margin between prostheca and mola concave, with frayed lobe close to subtriangular process; tuft of robust setae at base of mola present; subtriangular process wide; denticles of mola not constricted; lateral margin convex. Right mandible ( Fig. 2C View FIGURE 2 ): outer and inner sets of incisors with 3 denticles each; prostheca slender, bifurcated at apex; margin between prostheca and mola concave; tuft of setae at base of mola absent; denticles of mola constricted; lateral margin convex. Maxilla ( Fig. 2D View FIGURE 2 ): maxillary palp long, more than 2.5× the length of galea-lacinia; segment I slightly longer than galea-lacinia, segment II without distal constriction; maxillary palp with scarce, thin, simple setae scattered over the surface. Hypopharynx ( Fig. 2E View FIGURE 2 ): lingua subquadrate and longer than superlingua, with one medial lobe and without distal tuft of setae; superlingua not expanded, with short, thin, simple setae scattered over distal margin. Labium ( Fig 2F View FIGURE 2 ): glossa narrowing slightly distally with apex rounded, longer than paraglossa; dorsal surface with one arc of setae on distal half, from inner to outer margin; ventral surface covered with small robust setae (not completely illustrated). Paraglossa curved inward; dorsal surface with three robust setae on apex and with one longitudinal row of five robust setae near inner margin; outer margin with one row of 14 robust setae; ventral surface with one longitudinal row of five robust setae in the middle. Labial palp with segment I shorter than the length of segments II and III combined; inner projection of labial palp of segment II rounded and laterally directed, outer margin and projection covered with thin, long, simple setae; ventral surface of segment II with of thin, long setae near the outer margin; segment III triangular, covered with thin, long, simple setae on outer margin, dorsal surface with one row of nine robust setae, outer margin concave. Thorax. Foreleg ( Fig. 2G View FIGURE 2 ). Femur: with one row of 14 short robust setae on dorsal margin. Tibia: ventrally with one row of four short robust setae. Patella-tibial suture from dorsal to ventral margin. Tarsus: ventrally with one row of 12 short robust setae. Tarsal claws 1.4× the length of tarsus, row of denticles absent. Abdomen. Terga II and VII with a reddish medial mark, tergum V with a reddish lateral mark, terga IX and X reddish. Tergal surface covered by scale-like triangular spines ( Fig. 2H View FIGURE 2 ); posterior margin with triangular spines (longer than wide) ( Fig. 2H View FIGURE 2 ). Gill VI ( Fig. 2I View FIGURE 2 ) oblong. Paraproct ( Fig. 2J View FIGURE 2 ) with four marginal spines, posterolateral extension without spines. Cerci and paracercus with lateral spines on all segments.

Comments. This species is found with low abundance on the sand bottom of a small stream.

Etymology. After Bianca M. P. O. Boldrini, friend, wife of second author (R.B.), a great teacher and a fellow scientist, who gives him all the support needed.

Material examined. Holotype, one larva in alcohol, Brazil, Rondônia, Colorado do Oeste, Rio Cabixi , S 13°15’31.8” / W060°20’04.8”, 06.ix.2012, Boldrini, R., Fernandes, A.S., Hamada, N., Nascimento, J.M.C. cols, INPA GoogleMaps   . Paratypes, same data as holotype, one larva in alcohol and two mounted on slides, UFRR GoogleMaps   .

R

Departamento de Geologia, Universidad de Chile

INPA

Instituto Nacional de Pesquisas da Amazonia

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Ephemeroptera

Family

Baetidae

Genus

Apobaetis

Loc

Apobaetis biancae

Cruz, Paulo Vilela, Boldrini, Rafael & Hamada, Neusa 2020
2020
Loc

Boldrini, R. & Cruz, P. V. 2014: 4
2014