Gulf Coast Research Laboratory
Chalcinotrematinae subfamily
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Chalcinotrematinae - Seeking Ground Truth
Ground truth is a term used in cartography, meteorology, analysis of aerial photographs, satellite imagery and a range of other remote sensing techniques in which data are gathered at a distance. The collection of ground-truth data enables calibration of remote-sensing systems, and aids in the interpretation and analysis of what is being sensed.

More specifically, ground truth may refer to a process in which a data point from a sensory system is compared to what is contained in the source (at the present time) in order to verify the nature and identity of the source, thereby validating the methodology. In the molecular analysis of parasite DNA, extracted from nuclear protein, this comparison both groups the sampled organism with others related, and displays degrees of separation from other similar appearing organisms. The sensing technique of molecular analysis, correctly performed and interpreted, establishes "ground truth" for species identity.

Chalcinotrematinae - Characters of the Subfamily

    Vitelline follicles surround the testis
    The prepharynx is short
    Anterior extent of the uterus is anterior to the ventral sucker
    Miracidia in uterine eggs contain pigmented eyespots (at least in some species)

Chalcinotrematine species have a close ecological relationship with fishes of the Characiformes. A very large group, these fishes are primarily South American in distribution, extending North through Central America and Mexico into the region just South of the Rio Bravo (Rio Grande). Collections from these regions made in recent years by scientists from GCRL are redefining taxanomic relationships among these little-known parasitic organisms.

The Gulf Coast Research Laboratory (GCRL) is located at the nexus of three huge reservoirs of biological research material. The gradients of biodiversity provided by the freshwater wilderness watershed of the Pascagoula River, the unique and well-documented Pearl River system on the West, and their junctions with the Gulf of Mexico provide research opportunities in abundance. Not limited by local material, GCRL is actively collecting Haploporoidean trematodes in all global environments. A Parasitological Molecular Laboratory, a superb facility set aside for DNA analysis of the fresh material constantly arriving, is enabling insightful discoveries in the evolution and zoogeography of Haploporids.

Change Date 13 November 2011


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Copyright 01 November 2011 Gulf Coast Research Lab, Parasitology.All rights reserved.