Part Q, Arthropoda 3, Complete Volume

Abstract

The indicated Parts (excepting the first and last) are to be published at whatever time each is ready. All may be assembled ultimately in bound volumes. In the following list, already published Parts are marked with a double asterisk (U) and those in press or nearing readiness for press are marked with a single asterisk (*). Each is cloth bound with title in gold on the cover. Copies are available on orders sent to the Geological Society of America at 419 West 117th Street, New York 27, N.Y., at prices quoted, which very incompletely cover costs of producing and distributing them but on receipt of payment the Society will ship copies without additional charge to any address in the world.The list of contributing authors is subject to change.(A)-INTRODUCTION. M-MoLLUSCA 5 (dibranchiate cephalo-B-PROTISTA 1 (chrysomonads, cocco-pods). lithophorids, diatoms, etc.).N-MoLLUscA 6 (pelecypods). C-PROTISTA 2 (foraminifers). **O-ARTHROPODA 1 (trilobitomorphs) **D-PROTISTA 3 (radiolarians, tintin-(xix+560 p., 2880 figs.). $10.50. nines) (xii+195 p., 1050 figs.). **P-ARTHROPODA 2 (chelicerates, pycno-$3.00. gonids) (xvii + 181 p., 565 figs.

The History of Sexual Dimorphism in Ostracoda (Arthropoda, Crustacea) Since the Palaeozoic

“…With living specimens, the morphology of male copulatory organs and other appendages are also used for species identification, similar to identification techniques used for other crustaceans, such as decapods [24][25][26]. Fossil ostracods are commonly utilised by palaeontologists as important palaeoenvironmental and stratigraphic (geological age) indices, and have long been used in oil and gas exploration [4] [27][28][29].…”

“…The adult stage is termed 'A', whereas juvenile stages are numbered; e.g., 'A-1' (i.e., one stage before the adult) and 'A-2' (two stages before the adult), as shown in Figure 4 [20]. Sexual dimorphism (morphological differences between males and females) is commonly found on carapaces and appendages [4,9,30], as shown in Figures 5 and 6, and is especially recognisable during the last adult stage (A), and to a lesser degree in the later juvenile stages, such as A-1.…”

“…Carapace shape and size sexual dimorphism is common in ostracods, and males can be larger or smaller than females [4]. One example from the Mesozoic is a non-marine species of the podocopid genus Cypridea [15] [32].…”

“…500 million years since the early Palaeozoic, i.e., Ordovician (ca. 490 Ma = 490 million years ago) [4]. Ostracods are a class of small crustaceans (Figures 1 and 2) of which the adult form is around 1.0 mm in length, that inhabit most aquatic areas; e.g., marine, brackish, and freshwater conditions ( Figure 3) [5] [6].…”

The late Albian-early Cenomanian ostracodes from Naur Formation, Jordan

“…The suprageneric classification follows Liebau (2005) and the generic one is based mostly on Benson et al (1961).…”