The evolution of the head region in lower Arthropods and its bearing upon the origin and relationships of the Arthropoden groups

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• Strict warning: Declaration of csl_date::render() should be compatible with csl_rendering_element::render($data, $mode = NULL) in module_load_include() (line 329 of /home/otthuns3shsb/public_html/research/includes/module.inc).
• Strict warning: Declaration of csl_date_part::render() should be compatible with csl_rendering_element::render($data, $mode = NULL) in module_load_include() (line 329 of /home/otthuns3shsb/public_html/research/includes/module.inc).
• Strict warning: Declaration of csl_number::render() should be compatible with csl_rendering_element::render($data, $mode = NULL) in module_load_include() (line 329 of /home/otthuns3shsb/public_html/research/includes/module.inc).
• Strict warning: Declaration of csl_group::render() should be compatible with csl_rendering_element::render($data, $mode = NULL) in module_load_include() (line 329 of /home/otthuns3shsb/public_html/research/includes/module.inc).
• Strict warning: Declaration of csl_layout::render() should be compatible with csl_rendering_element::render($data, $mode = NULL) in module_load_include() (line 329 of /home/otthuns3shsb/public_html/research/includes/module.inc).