Kohlsia, Traub, 1950

Acosta, Roxana & Salceda-Sánchez, Beatriz, 2019, A New Species of Flea of the Genus Kohlsia Traub, 1950 (Siphonaptera: Ceratophyllidae) from Veracruz, Mexico, Zootaxa 4671 (4), pp. 564-570 : 568-569

Key to Mexican species of Kohlsia

To accommodate the new species, the taxonomic key of Acosta et al. (2009) is modified as follows:

1. Acetabular region with one long bristle.................................................................... 2

- Acetabular region with more than one long bristle........................................................... 3

2. Crochet with a projection...................................................................... K. fournieri

- Crochet without projection......................................................................... K. linni

3. Postantennal region with four rows of bristles............................................................... 4

- Postantennal region with three rows of bristles.............................................................. 5

4. In males, three antesensilial bristles, uppermost minute; movable process almost as long as wide............... K. martini

- In males, two antesensilial bristles, uppermost about three times as long as ventral-most, minute bristle near to the uppermost bristle; movable process at least one and a half times longer as wide..................................... K. zyanya

5. With 9–10 spines in pronotal comb; sternite VIII well developed................................................ 6

- With more than 11 spines in pronotal comb; sternite VIII variable in shape, not hyperdeveloped....................... 7

6. Four long, stout setae on the posterior margin of the movable process; sternite VIII well developed, ending in a plumose extension with one stout ventromarginal bristle; margin of female sternite VII with a narrow sinus, dorsal lobe narrow and tapering, ventral lobe broad with straight margin......................................................... K. ahuacatlan

- Three long, stout setae on the posterior margin of the movable process; sternite VIII well developed with truncate apex and subapical tuft of seven long bristles; margin of female sternite VII with a narrow sinus, dorsal lobe small and subacute, ventral lobe broadly rounded subtruncated..................................................... K. misantlensis sp. nov.

7. Distal arm of sternite IX bilobed, bearing one bristle......................................................... 8

- Distal arm of sternite IX not bilobed...................................................................... 9

8. Sternite VIII large, club-shaped process, apex bearing 5 ventromarginal bristles and two long medial bristles, dorsal margin with a hump, margin proximoventral dentate; distal arm of sternite IX with prominent ventral lobe with four stout marginal bristles and the apical lobe very markedly rounded and three very stout short setae......................... K. keenani

- Sternite VIII variable in shape, number and position of bristles, usually broad and short, with 2– apical bristles and 3–5 medial; distal arm of sternite IX with apical lobe bearing three stout marginal spiniform setae........................ K. mojica

9. Preantennal region with four rows of bristles; distal arm on sternite IX slender nearly to apex; apex of sternite VIII subtruncated, with two stout ventromarginal bristles and a patch of about ten very long and slender bristles; fixed process with a small hump...................................................................................... K. whartoni

- Preantennal region with three rows of bristles; distal arm different.............................................. 10

10. Fixed process with truncated apex with two short stout setae; distal arm of sternite IX with ventral lobe with three stout subspiniform but with proximal convexity; sternite VII pencil-like with a long apical bristle and two smaller subapical bristles.................................................................................................. K. cora

- Fixed process with apex narrowed and pointed with two slender bristles; distal arm in sternite IX wide near apex; sternite VIII with the ventral margin curved to the end with approximately 13 setae.................................... K. pelaezi