Functional morphology and feeding behavior of Paraprionospio pinnata (Polychaeta: Spionidae)

1985 ◽  
Vol 85 (2) ◽  
pp. 143-151 ◽  
Author(s):  
D. M. Dauer
Keyword(s):  
Feeding Behavior ◽  
Functional Morphology

scholarly journals Development and functional morphology of the foreguts of larvae and postlarvae of three crustacean decapods

2008 ◽  
Vol 68 (1) ◽  
pp. 221-228 ◽  
Author(s):  
F. Abrunhosa ◽  
M. Melo
Keyword(s):  
Feeding Behavior ◽  
Functional Morphology ◽  
Litopenaeus Vannamei ◽  
Morphological Characteristics ◽  
Filter Press ◽  
Juvenile Stage ◽  
Lateral Tooth ◽  
Gastric Mill ◽  
Digestive Function ◽  
Juvenile Stages

The development of the foregut structure and the digestive function of the decapods Litopenaeus vannamei, Sesarma rectum and Callichirus major larvae and post larvae were examined. The protozoeal foregut of L. vannamei is simple, lacking a cardiopyloric valve and bearing a rudimentary filter press. In mysis, the filter press is more developed. In the juvenile stage, grooves and a small lateral tooth arise. In S. rectum, the foregut has a functional cardiopyloric valve and a filter press. The megalopal and juvenile stages of this species have a gastric mill similar to those in adult crabs. In C. major, the foregut of the zoeae is specialized, with the appearance of some rigid structures, but no gastric mill was found. Calcified structures are observed in the megalopae and they become more developed in the juvenile stage. The results support suppositions, previously reported in other studies, that feeding behavior of each larval and postlarval stage is directly related to the morphological characteristics of the foreguts.

scholarly journals How Does the Male Penisfilum Enter the Female Copulatory Pore in Hangingflies?

Insects ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 123
Author(s):  
Zheng Wei ◽  
Xin Tong ◽  
Bao-Zhen Hua
Keyword(s):  
Feeding Behavior ◽  
Mating Behavior ◽  
Functional Morphology ◽  
Nuptial Gift ◽  
Spermathecal Duct ◽  
Nuptial Feeding ◽  
Subgenital Plate ◽  
Female Abdomen

Hangingflies are characterized by the interesting nuptial feeding behavior and unusual belly-to-belly hanging mating position. However, the mating behavior and the copulatory mechanism remain poorly known for Bittacidae, especially how the elongated male penisfilum enters the copulatory pore of the female. In this study, the mating behavior and copulatory mechanism of Terrobittacus implicatus (Huang and Hua, 2006) were investigated to reveal the functional morphology of hangingfly genitalia. The results show that the male provides a prey as a nuptial gift to the female and twists his abdomen about 180° to form a belly-to-belly hanging mating position. During the penisfilum-entering process, the male epandrial lobes clamp the female subgenital plate with the aid of the female abdomen swelling. Then the male locates the female copulatory pore through his upper branch of the proctiger and inserts his penisfilum into the female spermathecal duct in cooperation with the short setae on the groove of the proctiger. The female subgenital plate where the epandrial lobes clamp is strongly sclerotized and melanized. The copulatory mechanism of Terrobittacus is briefly discussed.

Functional morphology and feeding behavior of Streblospio benedicti and S. shrubsolii (Polychaeta: Spionidae)

Hydrobiologia ◽  
2003 ◽  
Vol 496 (1-3) ◽  
pp. 207-213 ◽  
Author(s):  
Daniel M. Dauer ◽  
Heidi K. Mahon ◽  
Rafael Sardá
Keyword(s):  
Feeding Behavior ◽  
Functional Morphology ◽  
Streblospio Benedicti
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