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Information on the genera of the haptophyte algae from Chapter 13 of the book "Freshwater Algae of North America: Ecology and Classification" is presented. It offers a description of the cells of the Chrysochromulina Lackey. The four freshwater species of Chrysochromulina (C) are C. parva, C. breviturrita, C. inornata and C. laurentiana.

A guide to literature for chrysophycean algae species identification, from chapter 12 of the book "Freshwater Algae of North America: Ecology & Classification," is presented. Literature cited includes "Studies on variability in the genus Dinobryon (Mastigophora)," "Microtubules of the flagellar apparatus are active during prey capture in the chrysophycean alga Epipyxis pulchra" and "Phylogenetic analysis of the SSU rRNA from members of the Chrysophyceae."

Information on the key and descriptions of chrysophyte genera, from chapter 12 of the book "Freshwater Algae of North America: Ecology & Classification," is presented. The structure of the vegetative stages are stressed by the elements of this key, and are based as much as possible on features seen with a light microscope. Genera described her include amphichrysis, anthophysa and chromophyton, among others.

Information on the ecology of chrysophycean algae from chapter 12 of the book "Freshwater Algae of North America: Ecology & Classification" is presented. Chrysophycea are almost entirely freshwater inhabitants, although a few species are found in brackish or marine waters. Chrysophytes are generally associated with softwater lakes and ponds that are low or moderate in productivity. They are also common in dilute, brown waters. The characteristics of their habitat are also described.

Information on the diversity and morphology of the chrysophycean algae from chapter 12 of the book "Freshwater Algae of North America: Ecology & Classification" is presented. The most known taxa of the North American chrysophyte flora are photosynthetic, but a few are colorless. Many genera are unicellular or colonial, while some forms live within a protective case called a lorica. The golden-brown color of most chrysophycean chloroplasts is because of the accesory xanthophyll pigment fucoxanthin.

A guide to literature for haptophyte algae species identification, from chapter 13 of the book "Freshwater Algae of North America: Ecology & Classification," is presented. Literature cited include "The Synurophyceae and their relationship to other golden algae," "Calcified structures and calcification in protists" and "A heteromorphic life cycle in two coastal coccolithophorids.

Information on chrysophycean algae from chapter 12 of the book "Freshwater Algae of North America: Ecology & Classification" is presented. The first chrysophyte ever described is Anthophysa vegetans, and over the next half century, light microscopic investigations of chrysophytes moved rapidly forward and included descriptions of species in the genera Dinobryon and Synura. The chrysophytes are described as having vegetative or reproductive cells that are heterokont with the two flagella inserted somewhat perpendicular to each other near the cell's apex.

Information on the ecology and distribution of the freshwater haptophyte algae from chapter 13 of the book "Freshwater Algae of North America: Ecology & Classification" is presented. Based on reports, Chrysochromulina parva (C. parva) is the most common haptophyte in lakes, ponds and rivers. C. parva is also a common element of the phytoplankton in small oligotrophic softwater lakes of Ontario's Precambrian Shield. The distributions of C. breviturrita and C. laurentiana are noted to be restricted to neutral and acidic lakes in northeastern North America.

Information on the diversity and morphology of the freshwater haptophyte algae from chapter 13 of the book "Freshwater Algae of North America: Ecology & Classification" is presented. According to a review of cell biology and infrastructure of haptophyte algae, the most distinctive feature of most members of the Haptophyta is the haptonema which, in most genera, is inserted between two smooth flagella of equal or subequal length. Other essential features of typical haptophyte cells include a nuclear envelope with an outer membrane.

Information on haptophyte algae from chapter 13 of the book "Freshwater Algae of North America: Ecology & Classification" is presented. Because of the presence of a unique flagellum-like organ called a haptonema, the Haptophyceae was split off as a class separate from the Chrysophyceae. Economically important haptophytes mentioned here include about a dozen species of ichthyotoxin producers in the genera Chrysochromulina, Phaeocystis, and Prymnesium.

Information on the collection and preparation of chrysophycean algae for identification, from chapter 12 of the book "Freshwater Algae of North America: Ecology & Classification," is presented. Mesh nets can be used to collect plankton, or a whole water sample can be concentrated for enumeration by settling or by filtration through membrane filters. In most cases, light microscopy can be used to identify chrysophycean genera.

Information on the collection and preparation of the freshwater haptophyte algae for identification, from chapter 13 of the book "Freshwater Algae of North America: Ecology & Classification," is presented. Field sampling methods for phytoplankton are applicable since all freshwater haptophytes are planktonic, this chapter notes. The difficulties posed by freshwater haptophytes for fixation and preservation of cell attributes necessary for identification. For dilute samples, it is advised to concentrate fixed cells by sedimentation.