TY - JOUR AU - Virkki, Niilo AU - O‘Brien, Charles W. PY - 1997/10/01 Y2 - 2024/03/28 TI - Chromosome numbers of some Brentid and Curculionid weevils from Puerto Rico and the U.S. Virgin Islands JF - The Journal of Agriculture of the University of Puerto Rico JA - JAUPR VL - 81 IS - 3-4 SE - Articles DO - 10.46429/jaupr.v81i3-4.3642 UR - https://revistas.upr.edu/index.php/jaupr/article/view/3642 SP - 191-201 AB - Chromosomes of 24 curculionoid species from the Greater Puerto Rico Region, including the U.S. Virgin Islands are listed. Seven are endemic and eight are notable agricultural pests. The male meioformula of the broadnosed weevils (Brachyderinae, Otiorhynchinae) as well as of the brentid <em>Cylas formicarius</em> <em>elengantulus</em> is the expected 10 + Xy<sub>p</sub>, except for the phyllobiine <em>Lachnopus kofresi</em> from Mona Island (16 + Xy<sub>p</sub>). Representatives of the other curculionid subfamilies had higher autosomal numbers and primitive sex bivalent, Xy<sub>p</sub>. An exception was <em>Anthonomus eugenii</em>, which has a sex trivalent (X<sub>1</sub>X<sub>2</sub>Y) in the male. For morphological and cytological reasons, <em>Lachnopus coffeae montanus</em> Marshall, L. <em>seini</em> Wolcott, and <em>L. yaucona</em> Wolcott were synonymized with <em>L. coffeae</em> Marshall (NEW SYNONYMIES). One species of <em>Ischionoplus</em> (Brachyderinae) is new to science and it is endemic for Mona Island. ER -