Australoheros perdi, new species (Teleostei: Labroidei: Cichlidae) from the lacustrine region of the Doce River Valley, southeastern Brazil, with biological information

Abstract

Australoheros perdi is a new species herein described from the lacustrine region of the middle Doce River basin, Doce River Valley, southeastern Brazil. The new species is distinguished from all its congeners by having only 25 vertebrae and by a combination of characters states listed below: three abdominal bars in all stages of life, a conspicuous, rounded caudalfin base spot, a conspicuous wide longitudinal stripe, head with depression in the region above the eyes, tip of pelvic fin reaching vertical through third to sixth anal fin spine base, fewer dorsal-fin spines, fewer pectoral-fin rays, fewer caudal vertebrae, fewer proximal radials on dorsal-fin base, more proximal radials on anal-fin base, more pleural ribs, a longer caudal peduncle, a deeper caudal peduncle, a wide ectopterygoid, a longer last anal-fin spine and a longer lower jaw. The available phylogenetic tree of the genus does not include the species from southeastern Brazil, thus impeding any discussion of the phylogeny of these species.

A new species of Laetacara from the northern Brazil coastal floodplains (Teleostei: Cichlidae)

“…4), a character state only shared with Cleithracara among cichlid genera; preopercle with two scales on the horizontal and one (rarely two) on the vertical limb; two scales rows on cheek; and absence of posterior lateral ethmoid-palatine articulation and accessory caudal-fin lateral line. Later OttOni &cOsta (2009) and confirmed the presence of a deep notch on the dorsal margin of the anterior ceratohyal for L. dorsigera, L. curviceps and L. araguaiae. However, neither casciOtta (1998) for some populations of L. dorsigera in Argentina, nor staecK & schindler (2007) for L. fulvipinnis observed the presence of that notch.…”

“…Laetacara Kullander, 1986 comprises species of small size (reaching about 110 mm SL as maximum adult size). It was described by Kullander (1986) to include four species previously placed in Aequidens eigenmann & Bray, 1894: Laetacara curviceps (ahl, 1924), from tributaries of the lower rio Amazonas ; L. dorsigera (hecKel, 1840), from the Guaporé and Mamoré river drainages of the rio Amazonas basin, rio Paraguay basin and middle rio Paraná basin (OttOni & cOsta, 2009); L. flavilabris (cOpe, 1870), from the western rio Amazonas basin (Kullander, 1986 andOttOni &cOsta, 2009);and L. thayeri (steindachner, 1875) widespread along the upper and middle rio Amazonas basin (Kullander,1986 andOttOni &cOsta, 2009); which have been redescribed by Kullander (1986), OttOni & cOsta (2009) and . In addition, two other species were recently described: L. fulvipinnis staecK & schindler, 2007, from the upper and middle rio Orinoco basin, and upper and middle rio Negro drainage of the rio Amazonas basin (staecK & schindler, 2007); and L. araguaiae OttOni & cOsta, 2009, from the rio Araguaia basin (OttOni & cOsta, 2009).…”

Update of diagnoses, information on distribution, species, and key for identification of Laetacara species (Teleostei, Cichlidae, Cichlasomatini)

“…Measurements and counts were made according to OttOni et al (2011 and OttOni & MattOs (2015). The smaller ray that occurs at the extremities of the dorsal, anal and pectoral fins may eventually be connected to the anterior ray.…”

“…However, it is counted as a separate element. Some measurements and counts provided by OttOni et al (2011) were erroneously and poorly defined, being herein redefined:…”

A new species of Crenicichla from the upper Rio das Antas basin, dos Patos lagoon system, southern Brazil (Teleostei: Cichlidae)

“…Based on morphological character states, it is closely related to C. maculata and C. punctata. lucena (2006) andottoni et al (2011). Measurements were taken on the left side of each specimen with digital cali-pers under a binocular microscope.…”