Lacustricola myaposae

description

Description. Morphometric data are presented in Table 1. Maximum recorded adult size 39.0 mm SL. Dorsal profile of body approximately straight to slightly convex from snout tip to dorsal-fin origin; convex along dorsal-fin base, and nearly straight on caudal peduncle. Ventral profile convex from lower jaw to beginning of anal-fin base; slightly convex along the anal-fin base and nearly straight on caudal peduncle. Caudal peduncle slightly deeper in males. Anterior portion of body laterally compressed, becoming more compressed behind anal-fin origin. Dorsal-fin rounded in males not reaching caudal-fin base; its origin in vertical between 6 th and 7 th anal-fin rays. (Fig. 7) Anal-fin rounded in males, tip not reaching vertical through dorsal-fin tip. Dorsal and anal-fins are not elongated in females. Caudal-fin slender. Pectoral-fin elliptical, its posterior margin reaching vertical just behind pelvic-fin base. Pelvic-fin length in males longer than in females, reaching urogenital papillae aperture; short in females, tip reaching region just before urogenital opening. Pelvic-fin bases medially separated by interspace broader than width of each pelvic-fin base. Dorsal-fin rays 8 (7),

Diversity of the southern Africa Lacustricola Myers, 1924 and redescription of Lacustricola johnstoni (Guenther, 1894) and Lacustricola myaposae (Boulenger, 1908) (Cyprinodontiformes, Procatopodidae)

diagnosis

Diagnosis. " Lacustricola " myaposae is distinguished from all congeners from the " L. " katangae clade by the absence of a zigzag black mark along the flank (vs. presence); and from congeners belonging to the " L. " hutereaui clade by the absence of barred dorsal, anal and caudal-fins and also by the absence of a conspicuous reticulate pattern on scales margin. It is further distinguished from all congeners except " L. " johnstoni and " L. " moeruensis by the presence of an orange dorsal, anal and caudal-fins in females (vs. hyaline); it is distinguished from " L. " johnstoni and " L. " moeruensis by the presence of light purple colouration in the posterior region of flank (vs. absence); an orange pectoral-fin in males (vs. hyaline); and by a distinct colouration pattern in both dorsal and anal-fins in which melanophores become continuously more concentrated close to fin margins, forming a grey zone before the margin become entirely dark (vs. absence of this colouration pattern). " Lacustricola " myaposae is further distinguished from " L. " johnstoni by a deeper body profile, males body depth 26.0 - 30.9 % of SL (vs. 20.6 - 24.4 % of SL), females body depth 22.8 - 25.1 % of SL (v

Diversity of the southern Africa Lacustricola Myers, 1924 and redescription of Lacustricola johnstoni (Guenther, 1894) and Lacustricola myaposae (Boulenger, 1908) (Cyprinodontiformes, Procatopodidae)

distribution

Distribution and habitat. " Lacustricola " myaposae is only known from the coastal river drainages and lacustrine systems in Kwazulu-Natal Province of South Africa to coastal lagoons south of the Maputo River in Mozambique (Fig. 2). The species is usually found associated with marginal vegetation along the banks of small and large rivers in freshwater. Despite occurring in a coastal area, little is known about the salinity tolerance capacity of " L. " myaposae.

Diversity of the southern Africa Lacustricola Myers, 1924 and redescription of Lacustricola johnstoni (Guenther, 1894) and Lacustricola myaposae (Boulenger, 1908) (Cyprinodontiformes, Procatopodidae)

materials_examined

Material examined. BMNH 1907.4.17.88, Lectotype; Myaposa River, Kwazulu-Natal, South Africa. Examined by photographs and x-rays. SAIAB 96619, 10 (2 C & S), 18.1 - 27.9 mm SL; Mhlathuze, KwaZulu-Natal, South Africa 28 ° 50 ' 18 " S, 31 ° 54 ' 41 " E; col: B. Ellender, O. Weyl & R. Karsing; 27 May. 2010. - SAIAB 88658, 31 (6 C & S), 21.3 - 38.0 mm SL; Bridge at Mseleni, KwaZulu-Natal, South Africa, 27 ° 21 ' 49 " S, 32 ° 31 ' 33 " E; col: B. Kramer, E. Swartz, P. T. Maake; 31 Oct. 2009. - SAIAB 96560, 1, 30.2 mm SL; Nseleni River Nature Reserve, KwaZulu-Natal, South Africa, 28 ° 41 ' 57 " S, 32 ° 0 ' 4 " E; col: R. Jones, O. Weyl; B. Ellender & R. Karsing; 23 May. 2010. - SAIAB 86637, 1, 34.0 mm SL; St Lucia area 2, KwaZulu-Natal, South Africa, 28 ° 20 ' 44 " S, 32 ° 21 ' 14 " E; col: R. Karssing, J. Craigie, S. Khubela, R. Ndlhovu, A. Xoswa; 08 Sep. 2009. - SAIAB 47128, 1, 40.5 mm SL; KwaZulu-Natal, South Africa; 31 Jan. 1989. - SAIAB 83143, 2, 38.1 - 38.2 mm SL; Greater St Lucia Wetland Park, Ozabeni, Ovalweni crossing, KwaZulu-Natal, South Africa, 27 ° 38 ' 59 " S, 32 ° 38 ' 9 " E; col: J. D. Craigie & R. Karssing; 29 May. 2007. - SAIAB 96591, 9 (2 C & S), 21.1 - 36.2 mm SL; Upper

Diversity of the southern Africa Lacustricola Myers, 1924 and redescription of Lacustricola johnstoni (Guenther, 1894) and Lacustricola myaposae (Boulenger, 1908) (Cyprinodontiformes, Procatopodidae)