The last beetles is a Tenebrionidae Phrenapatinae: Phrenapates sp. cf. P. bennetti Kirby

First and second photo, family Curculionidae (sensu lato),

Rinaldo Nicoli

Dear Gregor,

The second and three is Curculionidae and Scarabaeidae, respectively. Curculionids has a snout, as special characteristic for this family.

Commonly Curculionids and Scarab beetle  attacked coconut and another palms species. They  playing role as important pest in coconut plantation and sago plant in South Sulawesi.  Off course they are different species from your pictures.

regards,

Sri

Thanks a lot - the families are relatively easy. I am searching for the genus or even species names.

In my opinion, the third picture does not correspond to Scarabaeoidea or Scarabaeidae, the antennae are too different. As simple hypothesis, I suggest Carabidae, e. g. the subfamily Scaritinae (short moniliform antennae, strong body, well-developed mandibles). Regards,

Rinaldo Nicoli

To Rinaldo Nicoli

I just look at the mandibles of third pictures, thank you ...I have learn more your explain.

Regards,

First two are weevils (Curculionidae), the last one Passalidae (maybe Oileus sargi?? - but might even be another genus, passalids are superficially very uniform). For the weevils, email Nico Franz ([email protected])

Thanks for the additional hints. I will contact also the person you mentioned.

I thought to Passalidae, too; but the left antenna (about 10-11 antennomeres, including the terminal one, are visible) does not seem distally lamellate (maybe it's the observation angle that prevents from seeing it properly). The right antenna is only partially visible, and does not help in the family identification. I agree that it can be a passalid, several other features actually correspond. Regards,

Rinaldo Nicoli

The last beetles is a Tenebrionidae Phrenapatinae: Phrenapates sp. cf. P. bennetti Kirby

I agree with Enrico - and that solves the antenna conundrum.

Here is the synthesis so far:

1. Exophthalmus sp. (probably E. jekelianus), Curculionidae

2. Cholus leucosticus (subfamily Molytinae, Curculionidae)

3. Phrenapates sp. (probably P. bennetti, Tenebrionidae)

Thank you all for your help!!

Tenebrionidae Phrenapatinae, the right solution for the third photo has been found by Enrico Ruzzier.

Rinaldo Nicoli

Phrenapates sp. is correct for the third photo.

For the list of Costa Rica's coleopterofauna, I can recommend this website: http://www.crbio.cr/ (Atlas of living Costa Rica)

Many thanks for the confirmation and for the additional infromation/link!

The first is Curculionidae. See the attached photo, but I do not know the genus.

the second is also Curculionidae, and the third is Tenebrionidae.

Thanks.

Regards,

Wafaa

Thanks a lot. Have you done the photography in the attachment?

Regards

Greg