Alona azorica Frenzel & Alonso, 1988

Sinev, Artem Y., Alonso, Miguel, Miracle, Maria Rosa & Sahuquillo, Maria, 2012, The West Mediterranean Alona azorica Frenzel & Alonso, 1988 (Cladocera: Anomopoda: Chydoridae) is composed of two species, Zootaxa 3276, pp. 51-68: 60-61

publication ID

http://doi.org/ 10.5281/zenodo.209635

persistent identifier

http://treatment.plazi.org/id/CC29A561-1873-FF86-30A9-F9DDFC82F8A4

treatment provided by

Plazi

scientific name

Alona azorica Frenzel & Alonso, 1988
status

 

Alona azorica Frenzel & Alonso, 1988  .

( Figs 6View FIGURE 6, 8– 10View FIGURE 8View FIGURE 9View FIGURE 10)

Alona azorica Frenzel & Alonso, 1988: 449  –465, figs 1–8; Alonso, 1996: 331 –332, fig. 147.

Holotype. Female at the Zoological Museum of Hamburg University, K- 32354.

Studied populations were collected in: Laguna Grande de Gredos (Gredos Range, Ávila, August 1983); Marzagón pond (Marzagón, Huelva, May 1979); Rocío pond (El Rocío, Huelva, May 1979); Laguna de Antela (R. Margalef leg., Orense, July, 1954); Laguna Corrubedu (Corrubedu, A Coruña, May, 1980); Las Naciones pond (Saucedilla, Cáceres, April, 1986).

Short description: Parthenogenetic female. Body. In lateral view similar to that of previous species, regular oval ( Fig. 8View FIGURE 8 A –B, 9 A), of moderate height, moderately compressed laterally. Maximum height at middle of body, in adults height/length ratio about 0.65–0.72. Dorsal margin uniformly curved; postero-dorsal and postero-ventral angles broadly rounded; posterior margin uniformly curved; ventral margin almost straight; antero-ventral angle rounded. Ventral margin with about 35–45 setae, the first ten setae long, next ten setae short, other setae of moderate length. Postero-dorsal angle ( Fig. 9View FIGURE 9 B) as in previous species. Valves oblique or with small tubercules in dorsal portion, fully tuberculated specimens not recorded. Head same as in the previous species. Head shield ( Fig. 8View FIGURE 8 C) similar to that of previous species, but its posterior margin forms a protruding angle with pointed tip, in large specimens posterior portion of head shield elongates and became more narrow. Three major head ( Fig. 8View FIGURE 8 D, 9 C –D) pores with a narrow connection between two anterior pores; in smaller specimens broken connection sometimes present between middle and posterior pore ( Fig 9View FIGURE 9 C). Distance between medium and posterior pore greatly increases with the size of specimen, varying from 1.5 to 2.5 distances between anterior and middle pore. Minute lateral head pores located at level before anterior major head pore. Labrum ( Fig. 10View FIGURE 10 A) same as in previous species. Postabdomen ( Fig. 8View FIGURE 8 E, 9 E –F) same as in previous species. Antennula and antenna same as in the previous species. Thoracic limbs. Limbs I –III ( Fig. 10View FIGURE 10 B –F) same as in the previous species. Limb IV ( Fig. 10View FIGURE 10 G –H) similar to in previous species but with the following differences: setae 5–6 of exopodite longer, seta 5 as long as seta 4, flame-torch setae of endite IV shorter, more robust and less differentiated in size. Limb V ( Fig. 10View FIGURE 10 I) as in previous species.

Male. For full description see Frenzel & Alonso, 1988, and Alonso, 1996. Body similar to that of the previous species. Postabdomen ( Fig. 8View FIGURE 8 F) similar to that of previous species, but with much less prominent postanal angle, weakly narrowing in postanal portion and postanal angle not developed. Antennule and limb I same as in previous species.

Size. According to Frenzel & Alonso (1988), minimum length of juvenile female 0.19 mm, maximum length of adult female 0.48 mm, length of adult male 0.28–0.34 mm.

Kingdom

Animalia

Phylum

Arthropoda

Class

Branchiopoda

Order

Diplostraca

Genus

Alona

Loc

Alona azorica Frenzel & Alonso, 1988

Sinev, Artem Y., Alonso, Miguel, Miracle, Maria Rosa & Sahuquillo, Maria 2012
2012
Loc

Alona azorica

Alonso 1996: 331
Frenzel 1988: 449
1996