From variable to constant cell numbers: Cellular characteristics of the arthropod nervous system argue against a sister-group relationship of Chelicerata and "Myriapoda" but favour the Mandibulata
et Str.) Tetragnatha shikokiana Yaginuma Tetragnatha mandibulata
(Walckenaer) Tetragnatha maxillosa (Thoren, 1895) Tetragnatha jwvana (Thorell, 1890) Tetragnatha nigrita Lendle, 1886 Leucauge blanda (L.
For example, an excellent reference on phlyogeny (Margulis & Schwartz, 1998) lists three arthropod phyla (chelicerata, mandibulata
, and crustacea), while a standard general biology textbook (Campbell & Reece, 2005) considers these as belonging to only one phylum, arthropoda.
TABLA II NUMEROS DE ESPECIES DE DISTINTOS GRUPOS DE ORGANISMOS Y CONOCIMIENTO RELATIVO DE ALGUNOS GRUPOS POR REGION Numero de especies (x[10.sup.3]) Grupo Descritas por ano Conocidas Estimadas Mandibulata
7,2 963 8000 Plantas 1,7 270 320 Hongos 1,7 72 1500 Nematoda 3,7 25 400 Algas ??
Phylum 6 Uniramia (Mandibulata
, Mandibulates, Mandibulate Arthropods)
The genus Cyclospora was formed by Schneider in 1881 for organisms recovered from myriapods (terrestrial arthropods in the subphylum Mandibulata
, Class Diplopoda [millipedes] and Class Chilopoda [centipedes]).
The pattern of Distal-less expression in the mouthparts of crustaceans, myriapods and insects: new evidence for a gnathobasic mandible and the common origin of Mandibulata
L&F; LLK; transf to Microlinyphia
Araneidae and Tetragnathidae were the dominant families and Tetragnatha mandibulata Walckenaer 1842 (Family Tetragnathidae) the most abundant species.
The numerically most abundant species was Tetragnatha mandibulata Walckenaer 1842 (Family Tetragnathidae) with a total of 109 individuals (Appendix 1).
According to the traditional view, the myriapods are most closely related to the insects (common taxon "Tracheata" or Antennata), the crustaceans are the closest relatives of the Antennata (common taxon Mandibulata
), and the chelicerates are the sister group of the Mandibulata