Cryptogramophone: CG129 
http://www.cryptogramophone.com/catalog/penumbra 
http://extranet.cryptogramophone.com/cg129.shtml

* Bennie Maupin            : bass clarinet, tenor saxophone,
                             soprano saxophone, alto flute, piano
* Darek “Oles” Oleszkiewicz: bass
* Michael Stephans         : drums
* Daryl Munyungo Jackson   : percussion
 
http://www.benniemaupinmusic.com/ 
http://music.usc.edu/darek-oles/ 
http://www.michaelstephans.com/ 
http://www.munyungo.com/

Recorded by Nolan Shaheed at No Sound Studios, Pasadena,
California (CA), United States, on June 16 & 17, 2003,
  except for “Equal Justice”,
recorded by Wayne Peet at Crypto Studios, Los Angeles, CA,
on December 11, 2005, and mixed by Rich Breen.


Reviews
~~~~~~~

By Chris Kelsey 
http://jazztimes.com/reviews/albums/the-bennie-maupin-ensemble-penumbra/

[...]

On this excellent album, Maupin demonstrates that, while having never achieved
an exalted level of fame, he has nevertheless developed and refined a highly
individualized voice. Maupin’s aesthetic is all-embracing. His Ensemble
(Maupin, bass clarinet, flute, piano, tenor and soprano saxes; Darek Oles
Oleszkiewicz, bass; Michael Stephans, drums; Daryl Munyungo Jackson,
percussion) addresses such varied stylistic niches as free jazz, funk, Afrobeat
and postbop with the same heightened degree of inspiration.

[...]

--

By Thom Jurek 
http://www.allmusic.com/album/penumbra-mw0000400549

By John Kelman 
http://www.allaboutjazz.com/penumbra-bennie-maupin-cryptogramophone-review-by-john-kelman.php

By Jerry d'Souza 
http://www.allaboutjazz.com/penumbra-bennie-maupin-cryptogramophone-review-by-jerry-dsouza.php

By Matthew Miller 
http://www.allaboutjazz.com/penumbra-bennie-maupin-cryptogramophone-review-by-matthew-miller.php

By Derek Taylor 
http://www.dustedmagazine.com/reviews/2848

Grzegorz Mucha (pl) 
http://artpapier.com/index.php?page=artykul&wydanie=16&artykul=342

Carina Prange (de) 
http://www.jazzdimensions.de/reviews/jazz/2006/bennie_maupin_penumbra.html

Par Bernard Quiriny (fr) 
http://www.chronicart.com/musique/bennie-maupin-ensemble-penumbra/