Science - USA (2021-12-10)

denticle diversity in two widely separated

deep-sea sediment cores. We assert that

the pattern observed is not a consequence

of extinction but of shifting species ranges

induced by global current reorganization.

Full text: dx.doi.org/10.1126/science.abj8723

Response to Comment on “An early Miocene

extinction in pelagic sharks”

Elizabeth C. Sibert and Leah D. Rubin

Naylor et al. argue that the existence of

multiple denticle types within a single

species precludes the use of this metric

as a measure of the decline of multiple

shark species. We show that species-level

shark diversity would have to decrease by

>90% to account for the observed >70%

denticle extinction, implying that the early

Miocene shark extinction was larger than

previously recognized.

Full text: dx.doi.org/10.1126/science.abj9522

Comment on “An early Miocene extinction

in pelagic sharks”

I. Feichtinger, S. Adnet, G. Cuny, G. Guinot, J.

Kriwet, T. A. Neubauer, J. Pollerspöck, K. Shimada,

N. Straube, C. Underwood, R. Vullo, M. Harzhauser

Sibert and Rubin (Reports, 4 June 2021, p.

1105) claim to have identified a previously

unidentified, major extinction event of

open-ocean sharks in the early Miocene. We

argue that their interpretations are based on

an experimental design that does not account

for a considerable rise in the sedimentation

rate coinciding with the proposed event,

nor for intraspecific variation in denticle

morphology.

Full text: dx.doi.org/10.1126/science.abk0632

Response to Comment on “An early Miocene extinc-

tion in pelagic sharks”

Elizabeth C. Sibert and Leah D. Rubin

Fei chtinger et al. assert that the reduction in

denticle abundance and diversity we found

are incorrect, claiming that we failed to con-

sider changes in sedimentation rate. However,

we used standard methods that explicitly

account for changes in sedimentation rate

and density. We maintain that our initial data-

set and conclusions are robust and provide

evidence for a major early Miocene extinction

in pelagic sharks.

Full text: dx.doi.org/10.1126/science.abk1733

E R RATA

Erratum for the Research Article “Cauliflower

fractal forms arise from perturbations of floral

gene networks,” by E. Azpeitia et al., Science 374 ,

eabn5313 (2021). Published online 10 December

2021; 10.1126/science.abn5313

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TECHNICAL COMMENT ABSTRACTS

Comment on “An early Miocene extinction in
pelagic sharks”

Gavin J. P. Naylor, Arthur de Lima, José I. Castro,
Gordon Hubbell, Mario C. C. de Pinna
Sibert and Rubin (Reports, 4 June 2021, p.
1105) report an early Miocene extinction
in pelagic sharks based on the loss of shark

2022

AAAS MARTIN AND

ROSE WACHTEL

CANCER RESEARCH

AWARD

Recognize the work of an early career scientist who has

performed outstanding work in thefield of cancer research.

Award nominees must have received their Ph.D. or M.D. within

the last 10 years. The winner will deliver a public lecture on his

or her research, receive a cash award of$25,000, and publish

a Focus article inScience Translational Medicine.

For more information visit

http://www.aaas.org/aboutaaas/awards/wachtel

or e-mail [email protected].

Deadline for submission:February 1, 2022.