Late Cenozoic Ostracodes — Holden 
43 
dimensions: 
SPECIMEN LENGTH WIDTH HEIGHT 
USNM 648792 
(entire) T-7 0.59 0.31 0.35 
SDNH 1062 
(broken right valve) T-7 — 0.15 0.33 
distribution: As fossils from T-7 (2 valves; 
1 entire). 
discussion: This species is placed in the 
genus Hermanites on the basis of morphology 
and ornamentation. Conversely, the internal 
features are unlike other species previously as- 
signed to this genus: an excessive number of 
muscle scars, i.e., 6-7 antennal and 6-7 ad- 
ductor scars, occurs in the present species, 
where typically only one antennal and four 
mandibular scars should be present. 
Excessively divided adductor scars suggest 
the family Hemicytheridae ; however, the radial 
pore canals, though abundant and with mid- 
swellings, are not as abundant as in the hemi- 
cytherids and the midswellings are irregular. 
The only trachyleberid genus having exces- 
sive muscle scars is the Lower Cretaceous Iso- 
cythereis (Sylvester-Bradley in Moore, 1961: 
Q340) ; however, the present species does not 
otherwise resemble species of that genus. 
Neocaudites terryi n. sp. 
Figs. 33 a-d 
diagnosis: A smooth carapace; moderate 
size; small knob on posterior ventrolateral sur- 
face. 
description: In lateral view: length about 
2.1 times the height (males) to about 1.9 times 
the height (females) ; ventral margin slightly 
concave, curving upward at posteroventer with 
five or less short heavy spines; anterior margin 
finely denticulate, flattened in dorsal half ; dorsal 
margin straight, sloping backward behind high- 
est point of carapace just anterior to poorly 
developed eye tubercle; posterior margin trun- 
cate ; left valve slightly larger and strongly over- 
lapping right valve above eye tubercle; strong 
continuous marginal ridge present, angling ven- 
trally in posterodorsal area, forming oblique 
lateral ridge ending at indistinct subcentral 
tubercle; short arcuate ridge on lateral surface 
just posterior to, and paralleling, anterior mar- 
gin ; surface smooth with faint reticulations 
bordering ridges and above subcentral tubercle; 
small pronounced knob on posterior part of 
ventrolateral surface. In dorsal view: carapace 
laterally compressed ; length three times the 
width in both sexes; greatest inflation along 
Fig. 33. Neocaudites terryi n. sp. a-b, Holotype usnm 648756; a, right valve side view of entire male 
carapace; b, dorsal view, Paratype sdnh 1063; c, right valve side view of entire female carapace; d, dorsal view. 
