<a href="http
/www.cichlid-forum.com/profiles/species.php?id=460" target="_blank">http
/www.cichlid-forum.com/profiles/species.php?id=460</a>
A very brief profile on them but it should get you started.
<a href="http
/www.cichlidae.com/gallery.php?genus=Geophagus" target="_blank">http
/www.cichlidae.com/gallery.php?genus=Geophagus</a>
Should also help too
EDIT: Can't link to the exact page on cichlid room companion but this is the info it has on it:
Original description:
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As Geophagus parnaibae.
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Staeck, Wolfgang & Ingo Schindler; 2006; "Geophagus parnaibae sp. n.—a new species of cichlid fish (Teleostei; Perciformes; Cichlidae) from the rio Parnaíba basin, Brazil"; Zoologische Abhandlungen Museum für Tierkunde Dresden; 55; pp. 69-75.
Etymology: The species epithet parnaibae is a noun in the genetive case and refers to the distribution of the species in the basin of the rio Parnaíba.
Diagnosis: A small species of Geophagus (largest type 75,9 mm SL), which differs from all the other described species in the genus in the combination of (1) the lack of a ark infraorbital stripe or black opercular markings, (2) a caudal fin with distinct longitudinal bands, (3) only 30 or 31 scales in E1 row and (4) the small size (max. total length approximately 160 mm).
Geophagus parnaibae is a species of the G. surinamensis-complex (as diagnosed by López Fernández & Taphorn, 2004). It can be distinguished from all the described species outside this species-complex by the lack of a complete infraorbital stripe. Within the surinamensis complex the lack of a preopercular mark distinguishes Geophagus parnaibae from G. dicrozoster, G. winemilleri, G. proximus and G. brachybranchus. It can be distinguished from other Geophagus species without head markings except G. camopiensis by the low number of only 30 or 31 scales in E1 row. It differs from G. abalios (max. TL 20 cm), G. altifrons (23 cm), G. camopiensis (20 cm) and G. megasema (20 cm) by its smaller size (max. TL approx. 160 mm versus 200–250 mm) and from G. surinamensis and G. brokopondo by parallel horizontal bands versus light round spots in the caudal fin (cf. Kullander & Nijssen, 1989).
Geophagus parnaibae differs from G. camopiensis by a smaller (versus large) lateral spot, distinct longitudinal bands (versus light blotches) in the caudal fi n, usually XVII (versus XVI) dorsal fi n spines and usually 10 (versus 11) dorsal fi n rays. (Staeck & Schindler, 2006).
Type locality: Northeastern Brazil (Estado Maranhao), Richao Ponti near Timon (drainage of the rio Parnaíba).
Distribution: As currently known Geophagus parnaibae has a restricted distribution for it seems to be endemic to the drainage of the rio Parnaíba in northeastern Brazil (Estado Maranhao). The species is known from the following localities: tributary of the rio das Balsas between Richão and Balsas, small tributaries to rio Longa near Esperantina and near Barras, Richao Ponti near Timon and small tributary to rio Poti near Monsenhor Gil. (Staeck & Schindler, 2006).
Inhabiting countries: Brazil (endemic).
Habitat: Field observations indicate that the habitats preferred by Geophagus parnaibae are bare sandy bottoms in brooks and small rivulets which may have a remarkably strong current during the rainy season (Stawikowski, 1988). But during the dry season and the period of low water this species is frequently also found in pools and ponds with more or less stagnant water. Water data collected between April and September at several collecting sites: pH 6,5–7,6; electrical conductivity 20–350 ?S/cm; water temperature 24–31 °C. (Staeck & Schindler, 2006).
Feeding: The stomach and adjacent intestine of a specimen with a SL of 65 mm contained 80% plant matter (mainly seeds), aquatic insect larvae, detritus and sand grains (Staeck & Schindler, 2006).
Breeding: Geophagus parnaibae is a larvophile primitive mouthbrooder and practices biparental custodial care of the eggs and the fry (Stawikowski & Werner, 2004). Like several of its congeners this species starts reproduction like as a substratum spawner, but switches over to mouthbrooding as soon as the larvae hatch (Staeck & Schindler, 2006).
Comments: The species provisionally referred to as Geophagus sp. “Parnaiba” appears to have been known in the aquarium trade since 1988 when it was fi rst imported as an aquarium fish to Germany (Stawikowski, 1988).
References: