Part 1

Speciation in the Brazilian Spiny Rats (Genus Proechimys, Family Echimyidae)

BY JOÃO MOOJEN

University of Kansas Publications Museum of Natural History

Volume 1, No. 19, pp. 301-406, 140 figures in text December 10, 1948

University of Kansas LAWRENCE 1948

UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY

Editors: E. Raymond Hall, Chairman, A. Byron Leonard, Edward H. Taylor

Volume 1, No. 19, pp. 301-406, 1 plate, 140 figures in text

Published December 10, 1948

UNIVERSITY OF KANSAS Lawrence, Kansas

PRINTED BY FERD VOILAND, JR., STATE PRINTER TOPEKA, KANSAS 1948

22-3343

Speciation in the Brazilian Spiny Rats (Genus Proechimys, Family Echimyidae)

By JOÃO MOOJEN

CONTENTS

PAGE INTRODUCTION 305

METHODS AND TERMINOLOGY 305

ACKNOWLEDGMENTS 308

PALEONTOLOGY 308

SPECIATION 311 Subgeneric variation 312 Specific variation in the subgenus Proechimys 314 Subspecific variation in the subgenus Proechimys 317 Specific variation in the subgenus Trinomys 320 Subspecific variation in the subgenus Trinomys 322

TAXONOMIC CHARACTERS 323 Size and proportions of external parts 323 Pelage 324 Skull 326 Incisive foramen 326 Teeth 327

HABITS 330

CHANGES WITH AGE 331

Genus PROECHIMYS 333

ARTIFICIAL KEY TO SUBGENERA AND SPECIES 334

Subgenus PROECHIMYS 338 Proechimys goeldii 338 Proechimys goeldii steerei 338 Proechimys goeldii goeldii 340 Proechimys semispinosus 342 Proechimys semispinosus liminalis 343 Proechimys semispinosus amphichoricus 344 Proechimys semispinosus kermiti 345 Proechimys longicaudatus 346 Proechimys longicaudatus brevicauda 349 Proechimys longicaudatus boimensis 350 Proechimys longicaudatus longicaudatus 351 Proechimys longicaudatus leucomystax 352 Proechimys longicaudatus roberti 353 Proechimys guyannensis 355 Proechimys guyannensis villicauda 355 Proechimys guyannensis ribeiroi 361 Proechimys guyannensis hyleae 361 Proechimys guyannensis nesiotes 363 Proechimys guyannensis leioprimna 364 Proechimys guyannensis oris 365 Proechimys guyannensis arescens 366 Proechimys guyannensis riparum 367 Proechimys guyannensis arabupu 369

Subgenus TRINOMYS 369 Proechimys dimidiatus 371 Proechimys iheringi 373 Proechimys iheringi iheringi 378 Proechimys iheringi bonafidei 378 Proechimys iheringi gratiosus 379 Proechimys iheringi panema 380 Proechimys iheringi denigratus 381 Proechimys iheringi paratus 382 Proechimys setosus 384 Proechimys setosus setosus 385 Proechimys setosus elegans 387 Proechimys albispinus 388 Proechimys albispinus albispinus 390 Proechimys albispinus sertonius 391

INCERTA SEDIS 392 Proechimys myosuros 392