Distal parts of the intromittent organ of Phalloptychus januarius. A, the organ as it is normally found; b, unfolded: (a, third anal ray; b, fourth anal ray; c, fifth anal ray); c, third analy ray, 1 view. d, fifth anal ray, enlarged.
This fish is unique to Death Valley, California and is one of several Pupfish species endemic to the Mojave Desert. It is seen here in Salt Creek on the floor of Death Valley on March 16th 2012. The fish are not yet fully mature, and apparently turn blue later in the season. Image I12-0623.
Wilfredo A. Matamoros, Jacob F. Schaefer, Carmen L. Hernández, Prosanta Chakrabarty
Zookeys
Figure 2.Photographs of preserved specimens of A Profundulus kreiseri sp. n., USM 39022, holotype, 53.2 mm SL, Río Chamelecón, Honduras B Profundulus punctatus, UMMZ 194154, 47.0 mm SL, Rio Nahualete, Guatemala; and C Profundulus guatemalensis, UMMZ 190542, 43.7 mm SL, Río Maria Linda, Guatemala. The diagnostic characters of each species (A–C) are shown in D–F the white bar shows the extent of squamation on the caudal fin D Profundulus kreiseri sp. n., USM 39022, holotype (note that scales cover less than half of the caudal fin, and there are no rows of dark spots on the caudal peduncle and caudal-fin base) E Profundulus punctatus, UMMZ 194154 (note that the entire anterior half of the caudal fin is covered with scales, and rows of dark dots occur on the caudal peduncle and caudal-fin base; and F Profundulus guatemalensis, UMMZ 190542 (note that scales extend beyond the midpoint of the caudal fin, and there are no rows of dark spots on the posterior portion of the caudal peduncle and caudal-fin base).