Camelobaetidius kondratieffi Lugo-Ortiz & McCafferty, 1995

Sibaja-Araya, Fabián & Esquivel, Carlos, 2020, Redescription of four species of Camelobaetidius Demoulin, 1966 (Ephemeroptera: Baetidae) from Central and North America, Zootaxa 4758 (2), pp. 257-274 : 264-267

Camelobaetidius kondratieffi Lugo-Ortiz & McCafferty, 1995

( Figures 6–7 )

Camelobaetidius kondratieffi Lugo-Ortiz & McCafferty, 1995: 182 ; Lugo-Ortiz & McCafferty, 1996: 305; Wiersema & Baumgardner, 2000: 61; De Jong & Canton, 2015: 2.

Diagnosis. Mature nymph. The following combination of characters can be used to diagnose C. kondratieffi from remaining species in the region: 1) labrum with anterior margin with about 20 small, double, frayed setae; 5–6 frayed setae on anterodorsal arc, about 24 anterolateral setae; intermediate seta present; numerous small, simple setae near posterior margin; ventral surface with two short setae near lateral margin; one minute seta on anterior margin on both sides of cleft ( Fig. 6a ); 2) segment II of labial palp with subrectangular distomedial projection ( Fig. 7a ); 3) one small osmobranchia present at base of each forecoxa, but sometimes inconspicuous; 4) each tarsal claw with 40–45 denticles ( Fig. 7b ); 5) posterior margin of abdominal tergum IV with small, triangular spines subequal in length ( Fig. 7c ); 6) paraproct with 4–6 spines ( Fig. 7d ).

Description. Mature nymph body length: 5.5–6.5 mm; caudal filaments length 2.2–3.0 mm.

Head: Labrum ( Fig. 6a ): Broader than long; round, symmetrically emarginate at apex, arc of anterodorsal setae with 5–6 frayed setae, all extending beyond margin of labrum; intermediate seta present; numerous small setae near posterior margin; anterior margin with about 20 small, double, frayed setae; lateral margin with six simple setae and about 18 apically frayed long setae; ventral surface with dense arc of short, fine setae near anterior margin; two short setae near lateral margin; one minute seta near anterior margin on both sides of cleft. Left mandible ( Fig. 6b ): incisors worn; prostheca well developed; two minute setae between prostheca and mola. Right mandible ( Fig. 6c ): incisors worn; prostheca well-developed; two short, simple setae between prostheca and mola; molar disk well-developed. Hypopharynx ( Fig. 6d ): lingua about 1.8 x wider than superlinguae, but shorter than them, apically rounded, hairy on dorsal and ventral surfaces in upper half; superlinguae with upper half hairy on dorsal and ventral surfaces and serrate area at middle of lateral margin. Maxillae ( Fig. 6e ): robust; galea with four apical denticles, and two apical rows of setae, some setae of one of these rows large and thick but others thin, setae of other row shorter and curved; two setae on lacinia; palp robust and not surpassing apical denticles, segment I short, segment II thick with few marginal fine setae, segment III elongate with several marginal fine setae, longer than segment II. Labium ( Fig. 6a ): robust; glossae shorter than paraglossae; both dorsally with numerous elongate and curved setae, ventrally with several elongate and curved setae; palpi with segment I thick, as long as segments II + III, dorsal surface with numerous micropores; segment II with subrectangular distomedial projection, dorsal surface with several micropores, and 3–4 short, simple setae in upper half; ventral surface with numerous small marginal setae; segment III short and rounded, equally developed as distomedial projection, with numerous short, robust spines on ventral surface, dorsal surface with row of short and robust setae on apex.

Thorax: Hind wing pads present; one short osmobranchia present at base of each forecoxa but sometimes inconspicuous; each claw with 40–45 denticles ( Fig. 7b ).

Abdomen: Posterior margin of tergum IV with small triangular spines subequal in length and simple, fine setae surpassing length of longest spines ( Fig 7c ); paraproct with 4–6 sclerotized spines, several micropores and simple fine setae on dorsal surface, posterior margin with small triangular spines ( Fig. 7d ).

Distribution: Belize, Guatemala, Costa Rica and Panama ( Lugo-Ortiz & McCafferty, 1995; Lugo-Ortiz & Mc- Cafferty, 1996; Wiersema & Baumgardner, 2000; De Jong & Canton, 2015).

Material examined: Paratypes, three mature nymphs (two males and one female): Guatemala, dept. Izabal, Small stream in río Cahabón, near Cahaboncito , 4.I.1989 [ PERC] .

Figures

FIGURE 6. Camelobaetidius kondratieffi Lugo-Ortiz & McCafferty 1995, nymph. a) labrum (left d. v., right v. v.), b) left mandible,c) right mandible, d) hypopharynx (left d. v., right v. v.), e) maxilla.

FIGURE 7. Camelobaetidius kondratieffi Lugo-Ortiz & McCafferty 1995, nymph. a) labium (left d. v., right v. v.), b) claws, c) IV tergum spines, d) paraproct.