The cretaceous birds of New JerseyOlson, Storrs L.
Science
The cretaceous birds of New Jersey
Olson, Storrs L.
Birds, Fossil; Paleontology -- Cretaceous; Paleontology -- New Jersey
Locality and Horizon.--From Hornerstown, Upper Freehold Township,
Monmouth County, New Jersey; collected by J.G. Meirs; Late Cretaceous
(Maastrichtian), either basal Hornerstown Formation or Navesink
Formation.
Measurements (in mm).--Proximal end of humerus, YPM 855: proximal width
through dorsal and ventral tubercles 21.1, depth through bicipital
surface and tuberculum ventrale 11.6, depth of head 5.7.
[Illustration: Figure 4.--Proximal ends of left humeri of _Graculavus
velox_ and related birds: _a_, _Esacus magnirostris_ (Burhinidae), USNM
19649; _b,d,f,h_, _Graculavus velox_, holotype, YPM 855; _c,e,g, i_,
_Presbyornis_ sp., UCMP 126205. _a-c_, anconal view; _d,e_, anconal
view with distal portion tilted upwards; _f,g_, palmar view; _h,i_,
proximal view. All figures × 2; specimens coated with ammonium chloride
to enhance detail.]
Comparisons.--Marsh (1872) originally described this as a species of
cormorant (Phalacrocoracidae, Pelecaniformes) and included the species
_G. pumilis_ Marsh, 1872, also from New Jersey, and _G. anceps_ Marsh,
1872, from the Late Cretaceous of Kansas, in the same genus. Marsh
(1880) later referred _G. anceps_ to the genus _Ichthyornis_, where it
has remained. Shufeldt (1915:17-19) went into considerable detail to
show that the species of _Graculavus_, particularly _G. velox_, were
not cormorants, instead being limicoline shorebirds with similarities
to the Burhinidae, Haematopodidae, and Charadriidae. Accordingly,
Lambrecht (1933:540, 546) placed these taxa among the charadriiform
birds, but rather inexplicably listed velox under Shufeldt's substitute
name _Limosavis_ in the suborder Laro-Limicolae, while retaining
_pumilis_ in the genus _Graculavus_ in the suborder Limicolae.
Brodkorb (1963b:249) ignored Shufeldt's assessment of relationships
and placed _G. velox_ and _G. pumilis_ in the Phalacrocoracidae,
subfamily Graculavinae. Cracraft (1972) did not examine the specimens
attributed to _Graculavus_ in his consideration of the relationships of
_Telmatornis_.
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